Acromag 4683-TTM-1F User manual

Brand: Acromag

Model: 4683-TTM-1F

Type: User manual

INSTRUCTIONS: Model 4683-TTM-xF

AC-Powered RS-485 Network Repeaters

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯

Acromag Incorporated, 30765 South Wixom Road • P.O. Box 437 • Wixom, MI • 48393-7037, USA

Phone: (248) 295-0880 • Fax: (248) 624-9234 • E-mail: [email protected] • On-Line: http://www.acromag.com

MODEL DESCRIPTION

Model Power

4683-TTM-1F 115V AC ±10%

4683-TTM-2F 230V AC ±10%

4683-TTM-3F 24VAC ±10%

These devices are “rugged” RS-485 network repeaters used for

isolating network signals and extending communication

distances. Model 4683-TTM-xF units are similar to the

Acromag Model 4SCR-TTM-x models, but add field-selectable,

End-Of-Line (EOL) network terminations on board for both the

A and B sides, are UL/cUL approved, and work at higher baud

rates.

Operation is transparent to all other network devices and no

handshaking is required. Up to 32 RS-485 devices can be

driven. These repeaters are enclosed in a rugged aluminum

enclosure and come ready to mount on any base plate, or can

be installed into a NEMA enclosure for harsh environments.

Installation is as simple as mounting, setting the baud rate,

connecting and terminating the network, and connecting power.

FEATURES

● Designed for use with Johnson Controls N2 or BACnet

MS/TP bus.

● No handshaking & No extra control lines required.

● Full I/O signal isolation.

● Supports baud rates of 600, 1200, 2400, 4800, 9600,

19.2K, 38.4K, and 76.8K, switch-selectable.

● Field-selectable, End-of-Line (EOL) network terminators on

both the A (input) and B (output) sides.

● Transient protection installed to help protect connected

devices from destructive noise spikes and line transients.

● Status LED’s indicate transmission direction, RS-485 bus

fault conditions, and power.

● 115VAC, 230VAC, and 24VAC models supported (no

separate transformers are required for 24VAC models).

OPERATION

The Model 4683-TTM-xF network repeaters are used to isolate

and boost RS485 signals and extend network distance. Each

repeater will permit the addition of up to another 32 devices to a

network, and extend the communication distance another 4000

feet.

The repeater has two “sides” referred to as side A and side B.

Side A typically connects to the network towards the host (input

side). Side B connects to the extended network (output side).

Functionally, sides A and B are equivalent. Transient signal

protection is provided on both RS-485 sides. When both RS-

485 lines are idle, each side is in the receive mode. When a

one to zero transition is detected (signifying a start bit) on either

side, the opposite side’s transmitter is enabled (half-duplex).

The transmitter stays enabled for one character’s time (based

on the baud rate switch setting). The character received is then

passed through.

The repeater receives AC power through a three-screw terminal

strip. Input power is fused and isolated. Model 4683-TTM-1F

units require 115VAC, 4683-TTM-2F units require 230VAC, and

4683-TTM-3F units require 24VAC.

COMMUNICATION SPECIFICATIONS

Baud Rates: DIP switch settings on unit for 600, 1200, 2400,

4800, 9600, 19.2K, 38.4K, & 76.8K baud rates. Only one

switch must be closed according to baud rate required for

proper operation.

RS-485 Bus Loading: One unit load equivalent.

RS-485 Bus Drive: Complete RS-485 compliance for up to 32

unit loads (31 unit loads if a repeater is used).

End-of-Line Termination Network: Refer to Figure 1. The

EOL termination network is individually selected for both

the A and B sides by a pair of shorting clips. The A side

(input) is controlled by jumpers J1 & J2. The B side

(output) is controlled by jumpers J3 & J4.

The EOL network termination is enabled

for the A side or

the B side when the associated pair of jumpers are

positioned over pins 1 and 2. The EOL termination is

disabled (removed from circuit) when the pair of jumpers

are positioned over pins 2 and 3.

Duplex: Half duplex only.

Data Format: Ten bits typical (1 start bit, 8 data bits, and 1

stop bit). Other formats are supported.

Status Indicators: Red power LED; red RS-485 bus fault

LED’s, side A & B; green transmit LED’s, A-to-B & B-to-A.

PHYSICAL SPECIFICATIONS

Operating Temperature: -25°C to 70°C (-13°F to 158°F).

Relative Humidity (RH): 10 to 95% RH (non-condensing), up

to 40° C (104° F).

Power: 115VAC ±10%, 50/60Hz, 0.05A (Model 4683-TTM-1F);

230VAC ±10%, 50/60Hz, 0.03A (Model 4683-TTM-2F);

24VAC ±10%, 50/60Hz, 0.18A (Model 4683-TTM-3F).

Power Line Fuse: 0.5A, 250V, 3AG type. Refer to Figure 1

for fuse location.

Isolation: Unit includes galvanic and optical isolation between

RS-485 side A, RS-485 side B, AC power, and chassis

ground. Common mode voltages of up to 250Vrms, or

354V DC (withstands a 1500V AC dielectric strength test

for 1 minute without breakdown), are permitted on a

continuous basis. This complies with test requirements

outlined in ANSI C39.5-1974 for voltage ratings specified.

RFI Resistance: Withstands RFI field strengths of up to 10V

per meter at 27MHz, 151MHz, and 467MHz with no digital

effect, per SAMA PMC 33.1 test procedures.

Line Noise Effects: Field and power line terminals withstand

ANSI/IEEE C37.90-1978 Surge Withstanding Capability

(SWC) Test with no component failures. Unit is tested to

a standardized test waveform that is representative of

surges (high-freq. transient electrical interference),

observed in actual installations.

Communication Connections: Network repeater – both RS-

485 connections use modular terminal blocks with screw

clamps. Wire range is 14 to 26 AWG.

Power Wire Connections: Network repeater terminal block.

See label on unit for power to be applied to unit.

Approvals: UL/cUL Listed, US & Canada, Energy

Management Equipment.

Shipping Weight: 3.0 pounds (1.4 kg) packed per unit.

Acromag, Inc. Phone: (248) 295-0880 • Fax: (248) 624-9234 - 2 - • E-mail: sales@acromag.com • On-Line: http://www.acromag.com

REPEATER INSTALLATION

Mounting

Refer to Figure 1 below for mounting and clearance

dimensions.

This device is packaged in a rugged aluminum enclosure and

no auxiliary enclosure is required for most applications.

Mounting holes are provided for surface mounting the unit. You

may use an auxiliary enclosure to protect the unit in

unfavorable environments or vulnerable locations.

Termination Jumpers

Any RS-485 network will require that the network be properly

terminated at the ends of a network, or network segment.

Termination is usually found at the first and last node of a

network segment. Since a repeater is used to segment a

network, two sets of termination resistors will be required. One

at the input side and one at the output side.

Model 4683-TTM-XF units include selectable End-Of-Line

(EOL) termination resistors that can be enabled or disabled by

positioning jumper blocks on headers installed on the circuit

board (see Figure 2). You will have to remove the top cover to

gain access to these jumpers. Be sure to turn power OFF

before removing the cover or setting these jumpers. Simply

remove the single screw on each side of the enclosure and

slide the top cover off. Refer to Figure 2 of the following page

to locate and set these jumpers as required for your installation.

Optionally, you may leave these jumpers in their disabled

position and attach 120Ω termination resistors externally,

between the RT terminals adjacent to the network connections,

but this can only be used if the trunk bias is applied somewhere

else on the network (Reference Section 4.4.1 “Idle-line Fail-

safe” of the TIA Telecommunications systems bulletin

application guideline for TIA/EIA-485A).

Setting The Baud Rate

The unit includes an 8-position DIP switch (S1) along the

bottom edge. This switch is used to set the baud rate of the

repeater. Only the switch that corresponds to the required

baud rate should be closed (refer to label information next to

S1)—all other switches must be left in the OPEN position.

Electrical Connections (Refer To Figures 1-4)

Terminals can accommodate wire from 14-26 AWG, solid or

stranded.

1. Network - Input (Side A) & Output (Side B): Connect unit

as shown in Figures 3 and 4. Be sure to enable EOL

termination as required at the ends of the network. Make

sure the baud rate DIP switches are set to match the data

rate of the network.

2. Power: Connect AC power as shown in Figure 4 according

to model number. Input power is fused (3AG type, 0.5A,

250V). Refer to Figure 2 to locate this fuse if the red power

LED fails to light with power applied.

3. Ground: Ground unit at AC input ground (G) terminal. The

chassis is common to this earth ground connection.

543 876

COM

RTN

24VDC

4.30

2.10

TYP

0.30

3.70

BAUD

RATE

(53.34)

(7.62)

(93.98)

acromag

FAULT

6.40

7.0

RS-485

SIDE A

B - A

COM

RS-485

SIDE B

FAULT

A - B

24VDC

(177.80)

TYP

0.30

POWER

(109.22)

(162.56)

1 - 600 5 - 9600

2 - 1200 6 - 19.2K

3 - 2400 7 - 38.4K

4 - 4800 8 - 76.8K

FIGURE 1

(7.62)

MODEL 4683-TTM-XF REPEATER

MECHANICAL DIMENSIONS

Acromag, Inc. Phone: (248) 295-0880 • Fax: (248) 624-9234 - 3 - • E-mail: sales@acromag.com • On-Line: http://www.acromag.com

3 2 1

2 2

RTN

COM

3 2 1

24VDC

867

J2J1

534 2 1

J4 J3

COM D

COM

COMG

Vcc

EOL

DISABLED

EOL

DISABLED

RS-485

SIDE B

24VDC

A - B

FAULT

RS-485

SIDE B

B - A

RS-485

SIDE A

BAUD

RATE

FAULT

FUSE 3AG

0.5A, 250V

Status

LED's

Status

LED's

AC (HI)

1200 OHMS

HOT

POWER

220 OHMS

1200 OHMS

JUMPER PAIR

(ONE SIDE)

EOL

ENABLED

EOL Jumpers

Side B (OUT)

EOL

ENABLED

EOL Jumpers

Side A (IN)

GROUND

AC (LO)

RS-485

SIDE A

1 - 600 5 - 9600

2 - 1200 6 - 19.2K

3 - 2400 7 - 38.4K

4 - 4800 8 - 76.8K

FIGURE 2

EOL JUMPERS

EQUIVALENT CIRCUIT

(4683 UNITS ONLY)

NETWORK CONNECTIONS

4683-TTM-3F (24VAC)

4683-TTM-1F (115VAC)

4683-TTM-2F (230VAC)

REMOVE THIS SCREW ON EACH

SIDE TO REMOVE COVER

MODEL 4683-TTM-XF REPEATERS

End-of-Line (EOL) Termination Jumper Locations.

Input Power Fuse Location.

NOTE: 4683-TTM-3F UNITS ARE 24VAC POWERED

DIRECTLY AND DO NOT REQUIRE A SEPARATE

TRANSFORMER. THESE UNITS CAN SHARE THE

24VAC POWER BUS OR TRANSFORMER THAT IS

POWERING YOUR OTHER RS485 DEVICES.

Baud Rate

Switches

COM

1 1

COM

21 543 768

24VDC

1 243 5768

24VDC

DFT DFT DFT

POWER

RTN

RUN

acromag

RTN

RUN

BAUD

RATE

COM

DFT

Acromag

A-N3

DFT

Acromag

A-N5

BAUD

RATE

B-N1

Acromag

B-N3

DFT

Acromag

B-N5

DFT

Acromag

1 - 300 5 - 4800

2 - 600 6 - 9600

3 - 600 7 - 19.2K

4 - 2400 8 - 38.4K

AC INPUT

TB 1

RS-232C

232 >

485

RS485

FAULT

TB 2

RS-485

FAULT

B - A

RS-485

SIDE B

FAULT

acromag

POWER

HOST PC

A-N1

RS-485

DFT

Acromag

A-N4

DFT

Acromag

UP TO 4000 FEET

SIGNAL REPEATER

RS-485

OUTPUT

(SIDE B)

Acromag

ANY RS-485 DEVICE

Acromag

B-N4

B-N32

485 >

232

120

A-N2

1 - 600 5 - 9600

2 - 1200 6 - 19.2K

3 - 2400 7 - 38.4K

4 - 4800 8 - 76.8K

RS-485

SIDE A

A - B

B-N2

ANY RS-485 DEVICE

MODEL 4SCC-TTM-1

MODEL 4SCC-TTM-2

MODEL 4683-TTM-XF

A-N32

INPUT

(SIDE A)

RS-485

UP TO 4000 FEET

NETWORK SEGMENT 2

NO TERMINATION RESISTOR

UP TO 32

NODES PER

NETWORK

SEGMENT

NETWORK SEGMENT 1RS-232

FIGURE 3

SIDE-B EOL TERMINATION

JUMPERS ENABLED

UP TO 32

NODES PER

NETWORK

SEGMENT

(EXTENDED NETWORK)

MODEL 4683-TTM-X REPEATER

STATION CONFIGURATION

RS232-TO-RS485 SIGNAL CONVERTER

SIDE-A EOL TERMINATION

JUMPERS ENABLED

120 OHM TERMINATION

RESISTOR REQUIRED

AT END OF NETWORK

OR LAST DEVICE ONLY

OPTIONALLY, YOU MAY CONNECT TERMINATION RESISTORS EXTERNALLY

BETWEEN THE RT TERMINALS ADJACENT TO THE NETWORK CONNECTIONS

FOR SIDE A AND SIDE B, BUT THE INTERNAL JUMPERS MUST BE SET TO

DISABLED WHEN USING EXTERNAL TERMINATION.

120 OHM TERMINATION

RESISTOR REQUIRED

THIS END

The station configuration drawing of Figure 3 is for general illustration purposes only. Johnson

Controls systems customers should instead refer to the Metasys® Network Technical Manual for N2

Bus Communication, or the MS/TP Communication Bus Technical Bulletin for wiring connections

using the 4683-TTM-xF repeater.

Acromag, Inc. Phone: (248) 295-0880 • Fax: (248) 624-9234 - 4 - • E-mail: sales@acromag.com • On-Line: http://www.acromag.com

R R R R

RTN

D D

D Tx

R R R R

32 5 2345 78 10 11 12 13

6789 14 15 17 18 20 22 23 25

R 24VDC

COM

B - A

765432

COM COM

24VDC

AC INPUT

14 1 69

16 19 21 24

COM

1 4 7

POWER

W L2

POWER

FAULT

BAUD

RATE

RS-485

SIDE A

A-N3

24VDC

485 >

232

RS-485

SIDE B

TB 2

RS-485

232 >

485

RS485

FAULT

A - B

FAULT

RTN

TB 1

RS-232C

BAUD

RATE

1 - 600 5 - 9600

2 - 1200 6 - 19.2K

3 - 2400 7 - 38.4K

4 - 4800 8 - 76.8K

COM

5 COM

DSR

RTS

A-N1

A-N2

A B C

G G

CTS

acromag

AC (LO)

-1 OPTION

115VAC

RED POWER LED

AC (LO) COM AC (LO)

-3 OPTION

24VAC

4 - 2400 8 - 38.4K

1 - 300 5 - 4800

6 - 96002 - 600

3 - 2400

4 - 4800

7 - 38.4K

8 - 76.8K

S1 - BAUD RATE

1 - 600 5 - 9600

2 - 1200 6 - 19.2K

3 - 2400 7 - 38.4K

4 - 4800 8 - 76.8K

B-N1

A-N32

A-N31

120 OHM

TERMINATION

REQUIRED

RS232

AC (HI)

AC (LO)

-2 OPTION

HOST

DE9

COM

DB25

Ground

AC (HI)

acromag

Ground

AC (HI)

Ground

HOT AC (HI)

ANY

RS485

DEVICES

S1 - SET BAUD RATE

TO MATCH BAUD

RATE OF NETWORK.

S1 - BAUD RATE

3 - 1200 7 - 19.2K

S1 - SET BAUD RATE

TO MATCH BAUD

RATE OF NETWORK.

2 - 1200 6 - 19.2K

RS485 REPEATER

MODEL 4683-TTM-X

RS485

A-N30

B-N2

B-N3

RS485

POWER

CONNECTION

RED POWER LED

B-N4

B-N5

Ground

230VAC

UP TO 32

NODES PER

NETWORK

SEGMENT

B-N32

COM

SIGNALS AT

CONVERTER

HOST

RED RS485 FAULT LED (SIDE A)

TRANSMIT DIRECTION

B-TO-A & A-TO-B

-2 OPTION

230VAC

GROUND

AC (HI)

AC (LO)

-1 OPTION

SET BAUD RATE AT S1

TRANSMIT DIRECTION

RS485-TO-RS232 AND RS232-TO-RS485

DE9

DB25

TO HOST

RS232 CONNECTIONS

TO HOST COMPUTER

HOST PC

RED RS485 FAULT LED (SIDE B)

NOTE: SIDE-A AND SIDE-B EOL

TERMINATION JUMPERS ENABLED

UP TO 32

NODES PER

NETWORK

SEGMENT

FIGURE 4

L1 W 115VAC

L1 L2 230VAC

115VAC

Ground

RS232 TO RS485 CONVERTER

MODEL 4SCC-TTM-X

RED RS485 FAULT LED

120 OHM TERMINATION

RESISTOR REQUIRED

AT END OF NETWORK

OR LAST DEVICE ONLY

IMPORTANT:

MODEL 4683-TTM-X UNITS

INCLUDE INTERNAL, FIELD

SELECTABLE END-OF-LINE

(EOL) TERMINATION

RESISTORS FOR THE A AND

B SIDES. THESE ARE

ENABLED VIA INTERNAL

JUMPERS. DO NOT USE

EXTERNAL TERMINATION

WITH INTERNAL EOL

JUMPERS ENABLED.

SEE UNIT LABEL

TO VERIFY POWER

REQUIREMENTS

NOTE: JUMPERED PINS ARE

NULL-MODEM CONNECTIONS

WHICH ALLOW COMMUNICATION

BETWEEN THE HOST AND

ACROMAG SERIES 4100/4200

I/O STATIONS.

EXTENDED NETWORK

ANY RS-485 DEVICE

MODEL 4SCC-TTM-X CONVERTER

MODEL 4683-TTM-XF REPEATER

SYSTEM CONNECTIONS

The station configuration drawing of Figure 4 is for general illustration purposes only. Johnson Controls

system customers should instead refer to the Metasys® Network Technical Manual for N2 Bus

Communication, or the MS/TP Communication Bus Technical Bulletin for wiring connections using the

4683-TTM-xF repeater.

Acromag 4683-TTM-1F User manual

Acromag 4683-TTM-1F User manual

Acromag 4683-TTM-1F User manual

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