West Control Solutions CO 2/U User manual

Brand: West Control Solutions

Model: CO 2/U

Type: User manual

West Control Solutions CO 2/U is a power supply module for sensors, used for energizing transmitters, especially strain gauge or semi-conductor bridges for pressure sensors within the KS vario/vario system. Here is a brief summary of its capabilities:

Provides a supply voltage for pressure sensors, isolated from the remaining system
Offers two 10 V d.c. constant voltage outputs for energizing 1 or 2 strain gauge pressure sensors
Delivers an output current of 2 x 40 mA or 1 x 80 mA, with a maximum total of 80 mA
Features a typical accuracy of 0.6% and drift of 0.3%
Includes a short circuit protection for up to 1 hour

Provides a supply voltage for pressure sensors, isolated from the remaining system
Offers two 10 V d.c. constant voltage outputs for energizing 1 or 2 strain gauge pressure sensors
Delivers an output current of 2 x 40 mA or 1 x 80 mA, with a maximum total of 80 mA
Features a typical accuracy of 0.6% and drift of 0.3%
Includes a short circuit protection for up to 1 hour

©PMA Prozeß- und Maschinen-Automation GmbH 2004. Printed in Germany

reproduced or published in any form or by any means without prior written permission

by the copyright owner.

A publication of PMA Prozeß- und Maschinen-Automation GmbH

Subject to change without notice.

PMA Prozeß- und Maschinen-Automation GmbH

P.O. Box 31 02 29

D 34058 Kassel

Germany

Restriction of warranty:

No warranty is given for the complete correctness of this manual, since errors can never avoided

completely despite utmost care. Any hints are welcome and gratefully accepted.

Datasheet and Operating Instructions for VARIO Power supply Module for Sensors

9499 040 72811 3

1 General

GeneralGeneral

General

The vario power supply module for sensors is used for energizing transmitters, especially strain gauge or

semi-conductor bridges for pressure sensors within the KS vario/vario system.

The module provides a supply voltage for pressure sensors, which is isolated from the remaining system.

Power supply module for sensors, VARIO CO 2/U, order no. KSVC-103-02221

Power supply module for sensors, VARIO CO 2/U, order no. KSVC-103-02221Power supply module for sensors, VARIO CO 2/U, order no. KSVC-103-02221

Power supply module for sensors, VARIO CO 2/U, order no. KSVC-103-02221

2 Technical data

Technical dataTechnical data

Technical data

Supply voltage

Supply voltageSupply voltage

Supply voltage

: 24 V d.c. (from the analog voltage (U

ana

) of the vario station.

Current consumption

Current consumptionCurrent consumption

Current consumption

: approx. 120 mA

Output voltage

Output voltageOutput voltage

Output voltage

: 2 x 10 V d.c. constant voltage outputs for energization of 1 or 2

strain gauge pressure sensors

Output current

Output currentOutput current

Output current

: 2 x 40 mA or 1 x 80 mA. The sum must not exceed 80 mA.

Accuracy

AccuracyAccuracy

Accuracy

: typ. 0,6 %

Drift

DriftDrift

Drift

: typ. 0,3 %

Short circuit protection

Short circuit protectionShort circuit protection

Short circuit protection

:max. 1 h

Galvanic isolation

Galvanic isolationGalvanic isolation

Galvanic isolation

: isolated from the supply voltage (U

ana

), outputs galvanically

connected.

Display element

Display elementDisplay element

Display element

: 1 LED, yellow, for indication of the output voltage

Connection technique

Connection techniqueConnection technique

Connection technique

: cage clamp, 2-wire connection with screening

Dimensions

DimensionsDimensions

Dimensions

: 12,2 x 120 x 76 mm

Weight

WeightWeight

Weight

: approx. 70 g

Datasheet and Operating Instructions for VARIO Power supply Module for Sensors

9499 040 728114

Temperature range

Temperature rangeTemperature range

Temperature range

: operation: -25 °C to 55°C storage/transport: -25 °C to 85 °C

Humidity

HumidityHumidity

Humidity

: operation/storage/transport: average 75 %, 85 % occasional

Protection type

Protection typeProtection type

Protection type

: IP20 to IEC 60529

Bus interface

Bus interfaceBus interface

Bus interface

: not required, however, the internal bus is looped through the

module.

Accessories

AccessoriesAccessories

Accessories

: connector, inscription field (delivered with the unit)

3 Pin allocation and elementary circuit diagram

Pin allocation and elementary circuit diagram Pin allocation and elementary circuit diagram

Pin allocation and elementary circuit diagram

The screening earth connection must be made via the

function earth (FE).

function earth (FE).function earth (FE).

function earth (FE).

The screening is

connected to earth only with a non-interrupted connection up to the bus coupler module provided. (The

function earth is looped through all modules and connected to earth centrally at the bus coupler module.)

Datasheet and Operating Instructions for VARIO Power supply Module for Sensors

9499 040 72811 5

4 Pressure sensor connection

Pressure sensor connectionPressure sensor connection

Pressure sensor connection

Normally, pressure sensors consist of a full bridge circuit which must be energized by a voltage

galvanically isolated from the system. The diagonal voltage is applied to a controller module input (mV),

which is configured accordingly.

Sensor calibration is by means of a built-in resistor of a defined value in the pressure sensor. Without

pressure applied, the resistor changes the bridge resistance so that 80 % nominal output voltage are

available at its output. The relevant values are given in the pressure sensor data sheet. This resistance can

be connected in parallel to a bridge arm by an external relay, whereby a detuning of the bridge is caused.

The following relay modules are provided:

VARIO relay output module VARIO DO 1/230, order no. KSVC-102-01211 or VARIO relay output

module VARIO DO 4/230, order no. KSVC-102-01231.

These modules permit control of the relay, i.e. bridge resistance change, via the system bus.

When using these relay modules, the following information must be taken into account:

For using the module for switching the calibrating resistor, the only load must be the calibrating resistor.

The sparks generated by higher currents/voltages cause contact consumption and increase the contact

resistance, i.e. correct switching of a "dry circuit" is not ensured any more.

Datasheet and Operating Instructions for VARIO Power supply Module for Sensors

9499 040 728116

The relay modules should be always at the right end of a KS vario station. In these modules, the voltage

and U

(both 24V) are interrupted. Consequently, these voltage would have to be fed in again behind

the relay module.

The connector of a relay module (colour: median gray) must not be plugged into other modules, because

when using for purposes varying from the "calibrating relay", higher voltages (230 V AC) may also be

applied to the contacts. These can destroy the components of the contacted module components unless

plugged in correctly.

Although this connector is coded mechanically for protection against being inserted completely into other

modules by closing of contact holes 1.1 and 2.1, electrical connections can occur even with partial faulty

connection.

For extending the cable fitted to the pressure sensor, the same or a very similar cable type must be used

(6-wire, screened).

Datasheet and Operating Instructions for VARIO Power supply Module for Sensors

9499 040 72811 7

5 Maintenance and behaviour in case of fault

Maintenance and behaviour in case of faultMaintenance and behaviour in case of fault

Maintenance and behaviour in case of fault

The power supply module for sensors and the relay module do not need particular maintenance and no

components require any preventive maintenance or care.

5.1

5.15.1

5.1 Trouble shooting

Trouble shootingTrouble shooting

Trouble shooting

To start with, all possibilities of trouble sources due to connected instruments and cables (input leads,

wiring, equipment connected in the output circuit) should be checked. Unless the trouble was found after

these checkings, the instrument must be returned to the manufacturer:

PMA Prozeß- und Maschinen-Automation GmbH

PMA Prozeß- und Maschinen-Automation GmbHPMA Prozeß- und Maschinen-Automation GmbH

PMA Prozeß- und Maschinen-Automation GmbH

Service-Abteilung

Service-AbteilungService-Abteilung

Service-Abteilung

Miramstraße 87

Miramstraße 87Miramstraße 87

Miramstraße 87

D 34123 Kassel

D 34123 KasselD 34123 Kassel

D 34123 Kassel

If the trouble is found to be due to failure of a fuse, the cause must be determined and corrected. The

spare fuse must have the same rating as the original type.

Unless the LED is lit despite intact fuse and correctly connected supply voltage, the bus coupler is

defective and must be returned to the manufacturer for repair.

5.2

5.25.2

5.2 Shut-down

Shut-downShut-down

Shut-down

Before disconnecting the unit, disconnect the system

Before disconnecting the unit, disconnect the systemBefore disconnecting the unit, disconnect the system

Before disconnecting the unit, disconnect the system

completely

completelycompletely

completely

from the supply voltage and check that other

from the supply voltage and check that otherfrom the supply voltage and check that other

from the supply voltage and check that other

equipment connected in

equipment connected inequipment connected in

equipment connected in

the overall system is not effected.

the overall system is not effected.the overall system is not effected.

the overall system is not effected.

WARNING!

WARNING!WARNING!

WARNING! WARNING!

WARNING!WARNING!

WARNING!

When the instrument is suspected of being unsafe, it must be taken

When the instrument is suspected of being unsafe, it must be takenWhen the instrument is suspected of being unsafe, it must be taken

When the instrument is suspected of being unsafe, it must be taken

out of operation and protected against accidental switch-on.

out of operation and protected against accidental switch-on.out of operation and protected against accidental switch-on.

out of operation and protected against accidental switch-on.

5.3

5.35.3

5.3 Customer Support Hotline

Customer Support HotlineCustomer Support Hotline

Customer Support Hotline

For further questions beyond the scope of the KS 800 operating manual, please, contact one of the

following telephone numbers from Monday to Friday, between 8 a.m. and 16 p.m.

Tel. Custumer Support:

Tel. Custumer Support:Tel. Custumer Support:

Tel. Custumer Support: 49 561 505 3091

49 561 505 309149 561 505 3091

49 561 505 3091

Tel. Repair:

Tel. Repair:Tel. Repair:

Tel. Repair: 49 561 505 1257

49 561 505 125749 561 505 1257

49 561 505 1257

Tel. Sales Dept.:

Tel. Sales Dept.:Tel. Sales Dept.:

Tel. Sales Dept.: 49 561 505 1307

49 561 505 130749 561 505 1307

49 561 505 1307

e-mail:

e-mail:e-mail:

e-mail: [email protected]

mailbox@pma-online.demailbox@pma-online.de

mailbox@pma-online.de

Subject to change without notice

Postfach 31 02 29, D - 34058 Kassel

West Control Solutions CO 2/U User manual

Brand: West Control Solutions

Model: CO 2/U

Type: User manual

Provides a supply voltage for pressure sensors, isolated from the remaining system
Offers two 10 V d.c. constant voltage outputs for energizing 1 or 2 strain gauge pressure sensors
Delivers an output current of 2 x 40 mA or 1 x 80 mA, with a maximum total of 80 mA
Features a typical accuracy of 0.6% and drift of 0.3%
Includes a short circuit protection for up to 1 hour

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West Control Solutions CO 2/U User manual

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