DayTronic 3500 Series User manual

3500

INSTRUMENT SERIES

SB.3

INSTRUCTION MANUAL

No part of this document may be reprinted, reproduced, or used in any form or by

any electronic, mechanical, or other means, including photocopying and recording,

or in any information storage and retrieval system, without permission in writing from

Daytronic Corporation. All specifications are subject to change without notice.

3500

INSTRUMENT

SERIES

INSTRUCTION MANUAL

3500 Series Instruction Manual, v. SB.3

Pub. No. 3500M.3, Issued 1/97

Part No. 91668

Daytronic Corporation

2211 Arbor Blvd. • Dayton, OH 45439-1521 • Tel (937) 293-2566 • Fax (937) 293-2586

www.daytronic.com

1INTRODUCTION

a. Using This Manual ........................................................................................................ 1.1

b. General Instrument Descriptions

1. Introduction ....................................................................................................................... 1.1

2. The Model 3510 Thermocouple Conditioner ....................................................... 1.2

3. The Model 3530 LVDT Conditioner .......................................................................... 1.2

4. The Model 3540 Frequency Input Conditioner .................................................... 1.2

5. The Model 3560 Voltage Conditioner ..................................................................... 1.3

6. The Model 3570 DC Strain Gage Conditioner ...................................................... 1.3

7. The Model 3578 AC Strain Gage Conditioner ...................................................... 1.3

c. Physical Layout .............................................................................................................. 1.4

d. Panel Mounting ............................................................................................................... 1.6

e. Summary of Setup Button Functions ............................................................1.7

f. Summary of Logic I/O Functions ..................................................................... 1.8

g. Mnemonic Commands ............................................................................................. 1.9

2SETUP: CONNECTIONS AND POWER

a. Transducer Connections

1. The “Standard” Analog Input Connector ............................................................... 2.1

2. Connecting a Thermocouple to the Model 3510 ................................................ 2.1

3. Connecting an LVDT or Variable Reluctance Transducer

to the Model 3530 .......................................................................................................... 2.2

4. Connecting a Frequency Source to the Model 3540 ........................................ 2.4

5. Connecting a Voltage Source to the Model 3560 .............................................. 2.6

6. Connecting a DC Strain Gage Transducer to the Model 3570 ...................... 2.7

7. Connecting an AC Strain Gage Transducer to the Model 3578 .................... 2.8

b. RS-232 (“Single-Node”) Connections .......................................................... 2.10

c. RS-485 (“Multinode Network”) Connections ......................................... 2.12

d. Analog Output Connections .............................................................................. 2.15

e. Logic Input/Output Connections ................................................................... 2.16

f. Powerup ............................................................................................................................ 2.18

3SETUP: INSTRUMENT CONFIGURATION

a. Configuring Through the Front Panel

1. Entering and Exiting SETUP MODE .......................................................................... 3.1

2. Security Code .................................................................................................................. 3.2

3. RS-232 Communications Parameters: COM Key .............................................. 3.3

4. RS-485 Communications Parameters: COM Key .............................................. 3.7

5. Input Range: RANGE Key ........................................................................................... 3.8

a. Setting the Model 3510’s TC Type and Scale ................................................ 3.8

b. Setting the Model 3530’s LVDT Input Range .................................................. 3.9

c. Setting the Model 3540’s Frequency Input Range and Sensitivity ...... 3.10

d. Setting the Model 3560’s Voltage Input Range .......................................... 3.10

e. Setting the Model 3570’s DC Strain Gage Input Range

and Excitation .......................................................................................................... 3.11

f. Setting the Model 3578’s AC Strain Gage Input Range ........................... 3.11

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6. Filter: FILTER Key ......................................................................................................... 3.12

7. Analog Output: ANO Key .......................................................................................... 3.13

8. Limits: LIMIT Key .......................................................................................................... 3.14

9. Tare Offset: TARE Key ................................................................................................ 3.17

10. Print and Output Parameters: PRINT Key ........................................................... 3.18

b. Configuring Through the RS-232/485 Interface .................................. 3.20

1. Security Code ............................................................................................................... 3.20

2. Communications Parameters ................................................................................. 3.20

3. Thermocouple Type (Model 3510 ONLY) ........................................................... 3.21

4. Input Range or Scale .................................................................................................. 3.21

5. Excitation (Models 3570 and 3578 ONLY) .......................................................... 3.22

6. Sensitivity (Model 3540 ONLY) ............................................................................... 3.22

7. Filter .................................................................................................................................. 3.22

8. Analog Output .............................................................................................................. 3.23

9. Limits ................................................................................................................................ 3.23

10. Tare Offset ...................................................................................................................... 3.23

11. Print and Output Parameters ................................................................................... 3.23

4SETUP: INSTRUMENT CALIBRATION

a. Introduction: Calibration Techniques ............................................................ 4.1

1. Absolute Calibration ...................................................................................................... 4.1

2. “Actual” Two-Point (Deadweight) Calibration ....................................................... 4.2

3. “Simulated” Two-Point (Deadweight) Calibration ............................................... 4.2

4. Internal 15-Segment Linearization ........................................................................... 4.3

5. Calculated Calibration .................................................................................................. 4.3

6. Calculated Calibration Via Mnemonic Command .............................................. 4.3

b. Phase and Symmetry Adjustment of the

Model 3578 AC Strain Gage Conditioner .................................................... 4.4

c. Calibrating Through the Front Panel

1. Using the CAL Key ......................................................................................................... 4.8

2. “Actual” Two-Point (Deadweight) Calibration ....................................................... 4.8

3. “Simulated” (Shunt) Calibration for a Strain Gage Conditioner

(Model 3570 or 3578) ................................................................................................. 4.10

4. 15-Segment Linearization

a. Introduction .............................................................................................................. 4.12

b. By “TABLE” ............................................................................................................... 4.13

c. By “FORCE” .............................................................................................................. 4.15

5. “Calculated” Calibration

a. For the Models 3510, 3530, 3540, and 3560 ............................................... 4.16

b. For the Model 3570 (ONLY) ............................................................................... 4.17

d. Calibrating Through the RS-232/485 Interface .................................... 4.18

1. Setting the Active Calibration Method .................................................................. 4.18

2. “Two-Point” Calibration .............................................................................................. 4.19

3. 15-Segment Linearization ........................................................................................ 4.19

4. “Calculated” Calibration ............................................................................................ 4.20

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5RUN-TIME OPERATION

a. RS-232/485 Communications

1. RS-232/485 Outputs: CHN and DMP Commands ............................................ 5.1

2. Data-Transmission Format ......................................................................................... 5.1

3. “Opening” a Node to Receive Commands from the Computer ................... 5.2

b. Peak Capture ................................................................................................................... 5.3

c. Tare and Reset ................................................................................................................ 5.5

d. Initiating Hard-Copy Printouts ............................................................................. 5.6

e. Track/Hold Function .................................................................................................. 5.7

Appendix A 3500 SERIES SPECIFICATIONS

1. General Specifications ........................................................................................... A.1

2. Individual Conditioner Specifications

a. Model 3510 Thermocouple Conditioner .............................................................. A.2

b. Model 3530 LVDT Conditioner ................................................................................. A.3

c. Model 3540 Frequency Input Conditioner ........................................................... A.4

d. Model 3560 Voltage Conditioner ............................................................................. A.5

e. Model 3570 DC Strain Gage Conditioner ............................................................. A.6

f. Model 3578 AC Strain Gage Conditioner ............................................................. A.7

Appendix B COMMAND AND RESPONSE SYNTAX

1. Introduction: RS-232 and RS-485 Modes .................................................... B.1

2. The OPEN (OPN) Command ................................................................................ B.1

3. Response to “Invalid” Commands ................................................................. B.1

4. Setup Commands ....................................................................................................... B.2

5. Interrogation Commands ...................................................................................... B.2

6. Imperative Commands ............................................................................................ B.2

7. Commands That Initiate Data Transmissions ....................................... B.3

8. Table of Mnemonic Commands ....................................................................... B.3

Appendix C TABLE OF ERROR NUMBERS ...................................... C.1

Appendix D NETWORKING GUIDELINES ........................................... D.1

Appendix E RUN-TIME BUTTON FUNCTIONS ............................. E.1

Appendix F STANDARD LOGIC CONFIGURATION ................... F.1

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Illustrations

1(a) Typical “Run-Time” Display ........................................................................................... 1.4

1(b) Typical “Setup” Display .................................................................................................. 1.4

2(a) Rear Panel for the Model 3510 Thermocouple Conditioner

and the Model 3578 AC Strain Gage Conditioner ................................................ 1.5

2(b) Rear Panel for All Other 3500 Models ...................................................................... 1.6

3 Panel Mounting ................................................................................................................. 1.6

4 Use of NUMERIC BUTTONS in SETUP MODE ...................................................... 1.8

5(a) Standard Logic INputs and Outputs ......................................................................... 1.8

5(b) Shunt-Control Logic Inputs for the Model 3570 DC Strain Gage

Conditioner (ONLY) ..........................................................................................................1.9

6 Model 3510 Transducer Cabling ............................................................................... 2.2

7(a) Model 3530 Transducer Cabling: 5-Wire LVDT Cabling

(under 20 ft. in length) .................................................................................................... 2.3

7(b) Model 3530 Transducer Cabling: 7-Wire LVDT Cabling (20 ft. or longer) ... 2.3

7(c) Model 3530 Transducer Cabling: 3-Wire Variable Reluctance Cabling

(under 20 ft. in length) .................................................................................................... 2.3

7(d) Model 3530 Transducer Cabling: 5-Wire Variable Reluctance Cabling

(20 ft. or longer) ................................................................................................................ 2.4

8(a) Model 3540 Transducer Cabling: Differential (Floating) Frequency Input .. 2.5

8(b) Model 3540 Transducer Cabling: Single-Ended (Grounded) Frequency

Input ...................................................................................................................................... 2.5

8(c) Model 3540 Transducer Cabling: Input from a Zero-Velocity Sensor .......... 2.5

8(d) Model 3540 Transducer Cabling for Elimination of DC Offset ........................ 2.5

8(e) Model 3540 Transducer Cabling for Suppression of High-Frequency

Noise .................................................................................................................................... 2.5

9(a) Model 3560 Transducer Cabling: General Voltage Source ............................. 2.6

9(b) Model 3560 Transducer Cabling: External Potentiometer ............................... 2.6

9(c) Model 3560 Transducer Cabling: External DC-to-DC LVDT ............................. 2.6

10(a) Model 3570 Transducer Cabling: 4-Wire Cabling (under 20 ft. in length) ... 2.7

10(b) Model 3570 Transducer Cabling: 8-Wire Cabling (20 ft. or longer) .............. 2.7

11(a) Model 3578 Transducer Cabling: 4-Wire Cabling (under 20 ft. in length) ... 2.8

11(b) Model 3578 Transducer Cabling: 8-Wire Cabling (20 ft. or longer) .............. 2.8

11(c) Model 3578 Transducer Cabling: Installation of User’s External Shunt

Calibration Resistor ......................................................................................................... 2.9

11(d) Model 3578 Transducer Cabling: 8-Wire Cabling to LEBOW 1600

SERIES TRANSDUCER (ONLY) ................................................................................... 2.9

12 Suggested RS-232-C Interface Connections (to 25-Pin RS-232-C

Connector) ....................................................................................................................... 2.11

13 Suggested RS-232-C Interface Connections (to 9-Pin RS-232-C

Connector) ....................................................................................................................... 2.12

14(a) Connections for a Network of Three Instrument Nodes

(where the first is a 3500 Series Instrument) ...................................................... 2.13

14(b) RS-485 Cabling Between the Model 5E485 and the FIRST Network

Node (if it is a 3500 Series Instrument) ................................................................. 2.14

14(c) RS-485 Cabling Between Successive 3500 or 4000 Instrument Nodes .. 2.14

14(d) RS-485 Cabling Between a 3500 or 4000 Instrument Node and a

5000 Instrument Node ................................................................................................ 2.14

15 Analog Output Programming Pins .......................................................................... 2.15

16 Analog Output Connections (ALL Conditioners) ............................................... 2.16

(cont’d)

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viii

17(a) Logic I/O Connections: Input from External Switch .......................................... 2.17

17(b) Logic I/O Connections: External TTL Logic ......................................................... 2.17

17(c) Logic I/O Connections: External Controller ......................................................... 2.17

17(d) Logic I/O Connections: Output to External Relay .............................................. 2.18

18 Limit Zones ...................................................................................................................... 3.15

19 High and Low Hysteresis Windows ........................................................................ 3.16

20 Symmetry and Phase Adjustment Controls for the Model 3578 ................... 4.4

21 Typical Linearization Curve with Seven Segments .......................................... 4.12

22 Capture and Hold of Successively Higher-Valued Maxima ............................ 5.4

23 Capture and Hold of Successively Lower-Valued Maxima Using

Peak Reset ......................................................................................................................... 5.4

24 Tare Offset Operation .................................................................................................... 5.5

25 3500 Physical Dimensions .......................................................................................... A.1

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ONTENTS

1.a USING THIS MANUAL

THIS MANUAL TREATS ALL SIX STANDARD MODELS BELONGING TO THE

DAYTRONIC 3500 INSTRUMENT SERIES. THESE MODELS ARE AS FOLLOWS:

• the Model 3510 Thermocouple Conditioner

• the Model 3530 AC LVDT Conditioner

• the Model 3540 Frequency Input Conditioner

• the Model 3560 Voltage Conditioner

• the Model 3570 DC Strain Gage Conditioner

• the Model 3578 AC Strain Gage Conditioner

EXCEPT WHERE OTHERWISE STATED, THE INFORMATION IN THIS MANUAL

APPLIES EQUALLY TO ALL SIX MODELS.

DESCRIPTIONS, PROCEDURES, AND OPERATIONS SPECIFIC TO A GIVEN

MODEL OR MODELS WILL BE CLEARLY IDENTIFIED AS SUCH.

1.b GENERAL INSTRUMENT DESCRIPTIONS

1.b.1 INTRODUCTION

Every 3500 Series instrument can be completely set up and operated either

through the front-panel keypad or via simple mnemonic commands received

from an external computer or terminal through its RS-232/485 Interface Port.

The instrument can transmit data from this port in response to an interrogation

from an external computer, or can send it to an RS-232 serial printer when the

PRINT button is pressed (assuming that it is set to RS-232 mode). When in RS-

485 mode, a given 3500 instrument can represent one of up to 99 data-collection

"nodes" of a high-speed multidrop network.

Features common to all models include

• continuous dual-limit monitoring with front-panel annunciation, programmable

hysteresis windows, and TTL-level logic control outputs

• front-panel security code

• real-time positive peak capture or track/hold operation

• user-settable automatic tare offset

• internal 15-segment linearization for calibration of nonlinear inputs (except for

the Model 3510 Thermocouple Conditioner)

• selectable digital filtering

• selectable analog filtering (except for the Model 3510 Thermocouple Condi-

tioner)

• scalable analog output to drive strip-chart recorders or other devices (it may

also be used as feedback for a PID control loop)

• data-transmission formatting options, including "header" and "tailer" character

strings, node-number "echo," and limit-status indication

1.1

INTRODUCTION

1

1.a USING THIS MANUAL 1.b GENERAL INSTRUMENT DESCRIPTIONS

• logic-input control of peak capture, unlatching of latched limit conditions,

application of tare offset, and initiation of hard-copy printout

For complete specifications, see Appendix A.

1.b.2 THE MODEL 3510 THERMOCOUPLE CONDITIONER

This instrument accepts a temperature signal from a Type B, E, J, K, R, S, or T

Thermocouple. The sensor may be grounded or ungrounded. The conditioner

employs "absolute" calibration, which means that no calibration is required by the

user, once the proper "TC Type" is entered. During operation, appropriate refer-

ence-junction compensation, digital linearization, and engineering-unit scaling are

automatically applied. Detection of "open" thermocouples is also provided.

The 3510’s special rear connector assembly contains a thermistor for precise

measurement of the reference-junction temperature. Therefore, no external cold

junction is required—although the user may supply his own Controlled Ambient

Temperature Zone for reference-junction purposes, if desired.

1.b.3 THE MODEL 3530 LVDT CONDITIONER

This instrument measures displacement, force, pressure, and other parameters

obtained with a 5- or 7-wire linear variable differential transformer (LVDT)

capable of 3280-Hz operation and having primary impedance of 80 Ωor greater.

It can also be used with a 3- or 5-wire variable reluctance transducer. The

"normal" input range can be 0-150, 0-300, or 0-600 mV/V, full scale. Input provi-

sions also exist for "long-stroke" LVDT's (0-1, 0-2, or 0-4 V/V, full scale). Nominal 3

V-AC (rms) excitation is supplied.

1.b.4 THE MODEL 3540 FREQUENCY INPUT CONDITIONER

This instrument is used for measurement of flow, rpm, and other phenomena that

can be sensed by pulse transformer transducers with two-wire isolated windings

(tachometer pickups, turbine flowmeters, etc.), transistor or logic-circuit drivers,

"zero-velocity" (true digital output) sensors, and similar frequency-generating

transducers. It will accept any AC or unipolar pulse signal, floating or grounded,

irrespective of waveform. Input range is from 10% to 100% of 250, 500, 1000,

2000, 4000, 8000, 16000, or 32000 Hz.

The 3540’s analog-input threshold level is selectable to accommodate signals

from 100 mV to 100 V, thus guaranteeing reliable triggering when the input is at

the low end of the frequency range. Capacitive coupling of 0.1 µF is provided for

low-frequency inputs, to eliminate false triggering by signal noise or any DC offset

that exists for the frequency signal. For "zero-velocity" sensors, an excitation of

nominal ±5 V-DC ± 5% is supplied.

When you know the manufacturer-supplied full-scale rating of the frequency

source (or the highest frequency expected to be measured), the Model 3540’s

measurement channel can be quickly calibrated by issuing an "FRQ" command

through the RS-232/485 Interface Port.

1.2

1

INTRODUCTION

1.b GENERAL INSTRUMENT DESCRIPTIONS

1.b.5 THE MODEL 3560 VOLTAGE CONDITIONER

This is a general-purpose instrument for conditioning, displaying, and monitoring

the signal received from a DC-to-DC LVDT, potentiometer-type sensor, or other

external two-wire voltage source, either floating (differential) or grounded (sin-

gle-ended). The input signal may also represent output from some other instru-

ment system. Allowable full-scale voltage ranges are ±0.5, ±1.0, ±2.0, ±5.0, ±10.0,

and ±20.0 V-DC (up to ±100 V without damage). A ±12-V excitation is supplied for

sources that require it.

1.b.6 THE MODEL 3570 DC STRAIN GAGE CONDITIONER

This is a general-purpose instrument for input of pressure, force, torque, weight,

and other variables measured by conventional DC-excited strain gage trans-

ducers. It accepts a single input from any conventional 4-arm strain gage bridge,

nominal 120 ohms or higher, with a full-scale range of 0.75, 1.5, or 3.0 mV/V.

(User-supplied bridge-completion circuitry allows input from a 2-wire 1/4-bridge,

3-wire 1/4-bridge, or 1/2-bridge gage configuration.) The user may select a nomi-

nal excitation level of 2, 5, or 10 V-DC. Remote sensing of bridge voltage yields

consistently stable ratiometric measurement, unaffected by possible power-sup-

ply drift.

Simple two-point "zero and span" calibration is provided for the 3570’s input

channel. In addition, a 100-kΩ, 0.1% shunt resistor is supplied. You can use this

resistor—or one of your own—to apply an "equivalent input" for calibration purpos-

es, when the transducer's full-scale mV/V sensitivity is accurately known. The cal-

ibration shunt may be switched in and out for either a positive or negative

up-scale reading via simple commands issued to the RS-232/485 port or by

means of logic-level command signals through the rear Analog Input Connector.

A third calibration technique for the Model 3570 involves application of an "MVV"

command through the RS-232/485 Interface Port when both "mV/V" sensitivity

and corresponding full-scale rating of the transducer are known.

1.b.7 THE MODEL 3578 AC STRAIN GAGE CONDITIONER

This instrument is similar to the Model 3570 DC Strain Gage Conditioner, above,

but is of phase-sensitive carrier-amplifier design. Intended for applications involv-

ing transformer-coupling to the transducer bridge (as with rotary-transformer

torque sensors), it can also be used when high sensitivity is required or where

the electrical environment is especially noisy. Responding only to the modulated

carrier frequency, the 3578 rejects extraneous voltages that can cause errors in

DC systems, particularly when there is a need to "blow up" a portion of the trans-

ducer range.

The Model 3578 accepts input from a 4-arm bridge of nominal 90 ohms or higher,

and a full-scale range of 0.75, 1.50, or 3.00 mV/V. Excitation is fixed at 3 V-AC

(rms) at 3280 Hz. There are user-settable phase and symmetry controls. This

conditioner also offers the same shunt calibration provisions as the 3570, except

that shunt calibration of the AC Strain Gage Conditioner cannot be controlled via

logic-input commands.

1.3

INTRODUCTION

1

1.b GENERAL INSTRUMENT DESCRIPTIONS

1.c PHYSICAL LAYOUT

Study the following diagrams to acquaint yourself with the most important front

and rear elements.

Fig. 1(a) shows a typical "RUN-TIME" display, with "live" data and limit-status

annunciation. Note the four front-panel buttons that are active (but not necessari-

ly lit) during normal run-time operation. For a full description of run-time button

functions, see Appendix E.

Fig. 1(b) shows a typical SETUP display—specifically, the display that appears

after the security code has been entered and the unit is ready for any of the front-

panel setup procedures given in Sections 3.a and 4.a.

1.4

1

INTRODUCTION

ENTER

HI

OK

LO

COM RANGE CAL FILTER ANO DEC LIMIT

"Live" Limit

Status Indicators

"Live" Data

Display

Active Run-Time Buttons

Fig. 1(a) Typical “Run-Time” Display

SET UP PEAK

TRACK

TARE

RESET PRINT ENTER

HI

OK

LO

COM RANGE CAL FILTER ANO DEC LIMIT

"DEC" button lights when

decimal-point location of

setup parameter can be

changed

Limit Status Indicators

updated with every change

of the display

Setup message or

parameter value

Active Setup

Buttons are lit

1.c PHYSICAL LAYOUT

Fig. 1(b) Typical “Setup” Display

NOTE: Your instrument is supplied with a large assortment of standard engineer-

ing unit legends on a 4" x 5 1/2" dry transfer sheet. The selected legend may be

rubbed directly onto the instrument's front-panel frame using the tip of a ball-point

pen or the blunt end of a stylus or other burnishing tool. DO NOT PRESS TOO

HARD. You can easily make up your own legends, since the sheet includes indi-

vidual numerals, upper- and lower-case letters, ampersand ("&"), and Greek "∆,"

"ø," "µ," and "π."

The two rear panel types are shown below. The Model 3510 Thermocouple

Conditioner and the Model 3578 AC Strain Gage Conditioner have the rear

panel illustrated in Fig. 2(a). Each of these instruments employs a special CONDI-

TIONER CONNECTOR that attaches directly to the rear edge of the unit's internal

Analog Input Board. In addition, the 3578 (only) has rear-panel Symmetry and

Phase Controls. All other models use a standard "clip-on" Analog Input Connec-

tor like that shown in Fig. 2(b).

1.5

INTRODUCTION

1

1.c PHYSICAL LAYOUT

Analog Output

Connector

(see Fig. 16)

Conditioner Connector

—attaches to Analog

Input Board

(see Fig. 6 or 11)

Logic I/O

Connector

(see Figs. 5, 17)

Fuse

(0.5-amp SLO-

BLO)

ON-OFF

Switch AC Power

Connector

RS-232/485 Inter-

face Connector

(see Figs. 12 - 14)

Panel-

Mount

Clamp

Screw

ON

OFF

+

Analog Output

Programming Pins*

(behind cover plate—see Fig. 15)

Symmetry and

Phase Controls*

(see Fig. 20)

* Not present on the Thermocouple Conditioner.

Fig. 2(a) Rear Panel for the Model 3510 Thermocouple

Conditioner and the Model 3578 AC Strain Gage Conditioner

1.d PANEL MOUNTING

You can easily mount the instrument in your own precut panel. Cutout dimen-

sions for a panel-mounted unit are standard DIN (see Fig. 3); panel thickness

should not exceed 6 mm (0.24 in).

Simply unscrew the two rear-panel CLAMP SCREWS and slide the CLAMP

SLIDES rearwards out of their grooves (THE FRONT BEZEL NEED NOT BE

REMOVED). Insert the unit through the panel cutout, from the front of the panel (if

the unit has rubber feet, these will have to be removed). Then reinstall the

CLAMP SLIDES, and tighten the CLAMP SCREWS until the instrument is securely

mounted.

1.6

1

INTRODUCTION

1.d PANEL MOUNTING

Analog Output

Connector

(see Fig. 16)

Analog Input

Connector**

(see Fig. 7, 8, 9,

or 10)

Logic I/O

Connector

(see Figs. 5, 17)

Fuse

(0.5-amp SLO-

BLO)

ON-OFF

Switch AC Power

Connector

RS-232/485 Inter-

face Connector

(see Figs. 12 - 14)

Panel-

Mount

Clamp

Screw

ON

OFF

+

Analog Output

Programming Pins*

(behind cover plate—see Fig. 15)

+

Not present on the Frequency Conditioner.

The number of connector terminals will vary with the conditioner type.

*

**

Fig. 2(b) Rear Panel for All

Other 3500 Series Models

Fig. 3 Panel Mounting

138 ± 1.0 mm

(5.43 ± 0.04 in)

68 ± 0.7 mm

(2.68 ± 0.03 in)

CLAMP SLIDE

CLAMP

SCREW

1.e SUMMARY OF SETUP BUTTON FUNCTIONS

The use of the SETUP buttons is explained in detail in Sections 3.a and 4.a. The

following table summarizes the relevant functions:

Button Button Function (in SETUP MODE):

Used to exit current setup procedure ("COM," "RANGE," "CAL,"

etc.) or to exit SETUP MODE.

Used to enter a value into the TARE REGISTER.

Used to enter desired PRINT AND OUTPUT PARAMETERS:

printing interval; node-number "echo" (ON/OFF); and limit-sta-

tus indication (ON/OFF).

Used to enter desired COMMUNICATIONS PARAMETERS:

baud rate; number of data bits; number of stop bits; parity;

node number; INPUT TERMINATOR character; and OUTPUT

TERMINATOR character(s).

Used to enter desired INPUT RANGE or SCALE, plus other

parameters, where applicable (EXCITATION, SENSITIVITY, etc.)

Used for CALIBRATION of the analog input ("Two-Point," "Lin-

earization," or "Calculated").

Used to set the ANALOG and DIGITAL FILTERS.

Used to scale the ANALOG OUTPUT.

Used to change DECIMAL-POINT LOCATION for certain setup

values.

Used to enter LIMIT PARAMETERS: high limit; high hysteresis;

high latch (ON/OFF); low limit; low hysteresis; low latch

(ON/OFF).

Used to display the "existing value" of a setup parameter and

to finalize entry of a modified value.

In addition to the above SETUP buttons, the instrument provides two NUMERIC

BUTTONS for each displayed character of the LCD display, plus a polarity "sign"

button. These buttons let you change the value of a displayed number or step

forwards or backwards through a displayed series of allowed setup values. In

general, to increase by "1" the numeric value of a displayed digit (up to a maxi-

mum of "9"), press the TOP LCD SEGMENT of that digit, whether or not it is lit. To

decrease by "1" the numeric value of a displayed digit (down to a minimum of "0"),

press the BOTTOM LCD SEGMENT of that digit, whether or not it is lit. To change

the polarity of the displayed number, press the "minus-sign" segment at the

extreme left of the display (whether or not it is lit). The NUMERIC BUTTONS are

only active when the instrument is in SETUP MODE.

1.7

INTRODUCTION

1

1.e SUMMARY OF SETUP BUTTON FUNCTIONS

COM

RANGE

CAL

FILTER

ANO

TARE

RESET

PRINT

SET UP

DEC

LIMIT

ENTER

1.8

1

INTRODUCTION

1.f SUMMARY OF LOGIC I/O FUNCTIONS

The rear-panel LOGIC I/O CONNECTOR provides seven active logic input/output

bits in open-collector, negative-true form, where the "Logic 1" state is defined as

nominal 0 V-DC and "Logic 0" as nominal +5 V-DC. The standard logic I/O config-

uration is shown in Fig. 5(a), below, with reference to the 10-terminal Logic I/O

Connector on the rear of the unit. For recommended logic interconnections, see

Section 2.e. Each I/O function is fully described in Appendix F.

PLEASE NOTE: THE MINIMUM TIME ALLOWED BETWEEN ACTIVATION AND

REACTIVATION OF ANY OF THE FOUR LOGIC CONTROL INPUTS IS 100 MIL-

LISECONDS.

1.f SUMMARY OF LOGIC I/O FUNCTIONS

SET UP TARE

RESET PRINT ENTER

HI

OK

LO

COM RAN FILTER ANO DEC LIMIT

Press top segment to

increment digit (up to "9")

Press bottom segment to

decrement digit (down to "0")

Press "–"

segment to

change polarity

Fig. 4 Use of

NUMERIC

BUTTONS in

SETUP MODE

LOGIC LOW

TO ENABLE

Logic Inputs:

Logic Outputs:

"LIVE" DATA IN

"LESS THAN" ZONE

"LIVE" DATA IN

"OK" ZONE

"LIVE" DATA IN

"GREATER THAN" ZONE

UNLATCH

PEAK

TARE

PRINT

*

Ground connections to

be provided by user.

See also Fig. 17(a).

*

+

Fig. 5(a)

Standard Logic

Inputs and Outputs

You can use the three logic control outputs to actuate solenoid valves, illuminate

panel displays, sound alarms, start and stop motors or pumps, initiate and control

safety shut-down sequences, and perform many other automation tasks that

require "intelligent" switching, even of substantial amounts of power.

In addition to the standard logic inputs and outputs provided by the LOGIC I/O

CONNECTOR, the Model 3570 DC Strain Gage Conditioner (ONLY) also

accepts two negative-true logic inputs at its rear-panel ANALOG INPUT CONNEC-

TOR. These two inputs, shown in Fig. 5(b), let the operator directly control the

SHUNT CALIBRATION process, which is explained in detail in Section 4. Again,

see Appendix F for a full description of these logic functions.

1.g MNEMONIC COMMANDS

There are two ways to issue commands to a 3500 Series instrument. One way is

through the front-panel push buttons. These buttons allow you

• to enter all necessary SETUP COMMANDS, as explained in Sections 3.a and

4.a*; and also

• to enter RUN-TIME COMMANDS for control of positive peak capture, appli-

cation of tare offset, and initiation and halting of hard-copy transmissions (see

Sections 5.b, 5.c, and 5.d).

The second way to issue commands to the instrument is via the RS-232/485

Computer/Network Communications Interface. When set to the RS-232 (SINGLE-

NODE) mode, this interface will accept commands from a connected computer,

terminal, or other RS-232-C device. When the unit is used in the RS-485 (MULTIN-

ODE) mode, commands will normally originate from an application program in the

network's supervisory computer.

In either RS-232 or RS-485 mode, commands to the instrument must be transmit-

ted in a standard ASCII Command Syntax. This syntax uses simple three-letter

1.9

INTRODUCTION

1

ANALOG INPUT CONNECTOR

–

SHLD

SHUNT CAL

CONTROL

COM

SIG

+–

SIGCOM

PWR

*

Ground

connections to

be provided by

user. See also

Fig. 17(a).

*

LOGIC LOW

TO ENABLE

Logic Inputs:

+ CALIBRATE

– CALIBRATE

Fig. 5(b)

Shunt-Control Logic

Inputs for the Model

3570 DC Strain Gage

Conditioner (ONLY)

* As explained in Section 3.a.2, if a nonzero SECURITY CODE has been specified, the operator will

have to enter that code before any SETUP COMMANDS can be applied via the front-panel but-

tons.

1.g MNEMONIC COMMANDS

English mnemonics, and includes SETUP ("WRITE"), INTERROGATION ("READ"),

and TRANSMISSION-INITIATING commands. In RS-485 (MULTINODE) operation,

every command received at the RS-232/485 Interface Port will evoke a response

from that port (either "ACKNOWLEDGED," "NOT ACKNOWLEDGED," or the re-

quested PARAMETER or DATA VALUE(S)). For a complete listing of mnemonic

commands and responses, see Appendix B.

1.10

1

INTRODUCTION

1.g MNEMONIC COMMANDS

2.a TRANSDUCER CONNECTIONS

2.a.1 THE “STANDARD” ANALOG INPUT CONNECTOR

All 3500 Series instruments except the Model 3510 Thermocouple Conditioner

and the Model 3578 AC Strain Gage Conditioner use the "standard" Analog

Input Connector. Shown in Fig. 2(b), this connector is located on the rear of the

unit. The number of terminals and the specific terminal assignments will depend

on the model itself.

Referring to the appropriate cabling diagram below, connect the wires of your

transducer cable to the corresponding screw terminals of the Analog Input Con-

nector. To facilitate cable connection, the front (screw-terminal) portion of the

connector may be removed from the rear (pin) portion, which is mounted on the

internal Analog Input Board. Press hard when reinserting the front portion, to

make sure it is fully engaged (the small clips should snap into place on the rear

portion).

The special CONDITIONER CONNECTORS used by the Model 3510 Thermocou-

ple Conditioner and the Model 3578 AC Strain Gage Conditioner are described in

the respective sections below.

PLEASE NOTE: CABLE SIGNAL WIRES OR TWISTED WIRE PAIRS SHOULD

ALWAYS BE PROPERLY SHIELDED, AS INDICATED IN THE CABLING DIAGRAMS.

THIS WILL MINIMIZE THE PRODUCTION OF UNWANTED ELECTRICAL NOISE

FROM CAPACITIVE AND INDUCTIVE EFFECTS.

2.a.2 CONNECTING A THERMOCOUPLE TO THE MODEL 3510

The Model 3510 Thermocouple Conditioner's rear Analog Input Board mates

with a special CONDITIONER CONNECTOR (shown in Fig. 2(a) and in Fig. 6,

below), which provides a precision thermistor for reference-junction compensa-

tion. This connector contains a screw-terminal pair labelled "+" and "–." The other

two terminals are not used.

Each TC lead should be directly attached to its corresponding screw terminal (it

should never be soldered). The connector itself is "keyed" by a small plastic

insert embedded between a certain terminal-pin pair, which matches a slot in the

rear Analog Input Board. This prevents the connector from being inadvertently

attached upside-down.

Open the connector housing by removing the four screws that hold it together

(two on each side). Be sure to put back the insulating foam block before

reassembling the connector. It's also a good idea to wrap each cable wire

around the respective strain-relief post.

The "shield" wire of the transducer cable should be soldered to the exposed ter-

minal of the L-shaped GROUND LUG located under the head of one of the con-

nector's two captive screws. This will ensure direct shield contact with the 3510’s

metal case.

Open Thermocouple Detection—In the event of a broken thermocouple wire or

other "open TC" condition, the 3510 will automatically report an indeterminate off-

scale reading—that is, a value well outside the normal range of the TC type for

which it has been set.

2.1

SETUP: CONNECTIONS AND POWERUP

2

2.a TRANSDUCER CONNECTIONS: MODEL 3510

The Model 3510 is normally preset at the factory for positive off-scale "open TC"

indication. However, you may easily reset it for negative indication. Open the

connector housing and locate the "Open TC Detection Programming Jumpers"

(see Fig. 6). You will have to remove the solder drop connecting the middle termi-

nal pad to the "HI" (positive) pad, and to place a solder drop between the middle

pad and the "LOW" (negative) pad. Use a fine-point solder gun to heat the solder

drop to be removed, until it has melted sufficiently for you to wipe it off with a

clean rag. Make sure you remove all traces of solder from the jumper pads you

wish to disconnect.

2.a.3 CONNECTING AN LVDT OR VARIABLE

RELUCTANCE TRANSDUCER TO THE MODEL 3530

With regard to transducer cabling for the Model 3530 LVDT Conditioner, please

note the following:

a. 5-wire LVDT cabling (Fig. 7(a)) or 3-wire variable reluctance transducer

cabling (Fig. 7(c)) is to be used when the cable is under 20 feet in length. In

this case, the +SENSE and –SENSE lines are tied to the corresponding EXCI-

TATION lines at the CONDITIONER CONNECTOR.

7-wire LVDT cabling (Fig. 7(b)) or 5-wire variable reluctance transducer

cabling (Fig. 7(d)) is to be used when the cable is 20 feet or longer. In this

case, the +SENSE and –SENSE lines are tied to the corresponding EXCITA-

TION lines at the transducer.

b. When wiring an LVDT transducer to the 3530, you should connect both series-

opposed secondary coils to the terminal labelled "CENTER WIRE," as shown

in Figs. 7(a) and 7(b).

c. NOTE THAT THERE ARE SPECIAL +SIGNAL AND –SIGNAL CONNECTIONS

FOR USE WITH LONG-STROKE LVDT'S (FULL-SCALE INPUT OF 0-1, 0-2, OR

0-4 VOLTS/VOLT).

Thus, to allow for the larger input voltages produced by such a sensor, you

would connect its +SIGNAL line to the terminal labelled "HI +SIG," instead of to

the "+SIG" terminal. Similarly, you would connect the –SIGNAL line to the ter-

minal labelled "HI –SIG" instead of to the "–SIG" terminal.

2.2

2

SETUP: CONNECTIONS AND POWERUP

2.a TRANSDUCER CONNECTIONS: MODEL 3530

+–

To

Thermocouple

Conditioner

Analog Input

Board

– SIGNAL

+ SIGNAL

SHIELD Ground

Lug

LOW HI

Strain

Relief

Post

Open TC Detection

Programming Jumpers

This terminal

NOT USED

This terminal

NOT USED

+ +

Fig. 6 Model 3510

Transducer Cabling

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DayTronic 3500 Series User manual

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