B&B Electronics 232CLDR Quick Start Guide

Documentation Number –p/n 8677R1 232CLDR-3512qsg

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Underwriters Laboratories Conditions of Acceptability – When installed in the end-use equipment, consideration should be given to the following:

1. The wiring terminals are suitable for factory wiring only.

2. This device is to be mounted in a suitable enclosure in

the end-product.

3. This device is suitable for operation at a maximum

surrounding air temperature as described in the documentation.

4. These devices are intended for use in a pollution

degree 2 environment.

 Input Voltage: 10 – 30 VDC  Input Power: 2.5 Watts  Wire Range: 12 – 24 AWG  Tightening Torque: 4 kgf-cm  Temperature rating of field installed conductors is 105 C

minimum, sized for 60 C ampacity.

 Use copper wire only  Maximum surrounding ambient air temperature 80 C.

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 232CLDR Optically Isolated RS-232 to Current Loop

Converter

 This Quick Start Guide  Additional Items Required but not included

o Power Supply (10 to 30 VDC, 2.5 W) o Cabling

Quick Start Guide

232CLDR

Optically Isolated RS-232 to

Current Loop Converter

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Terminal Block

Signal A

RS-232 RD (Output)

Not Used

Ground

RS-232 TD (Input)

Not Used

+10 to 30 VDC

T(-) H T(+) J Current Ground

R(-)

R(+)

Current Ground

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Put

Documentation Number –p/n 8677R1 232CLDR-3512qsg

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 Connect your PC to the RS-232 side.  Place a jumper between Terminal G & L and

Terminal H & J.

 Using hyper terminal or similar program, connect

to the appropriate COM port. Turn off hyper terminal local echo.

 Transmit data. The same data should be returned.

Data LED will indicate data being transmitted.

3. To determine if your current loop device is

“active” or “passive” a multi-meter is required. Set the meter to DC Volts and put the positive (red) lead on the T+ line and the negative (black) lead on the T- line of the current loop device. If a voltage is displayed on the meter, your device is active.

4. The following is an example of how to extend

RS-232 using two 232CLDR Current Loop Converters. The converter on the left is

configured as “active” the converter on the right is configured as “passive.”

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1. The 232CLDR has one optically isolated 20 mA

transmit loop and one optically isolated 20 mA receive loop. Each loop can be set to either “Active” or

“Passive. When set to “Active” an isolated 20 mA

current is supplied for each loop (transmit and receive). The same power supply provides power to the converter and both current loops.

2. The 232CLDR can communicate at baud rates up to

19.2 kbps and distances up to 2000 ft (600 m).