TELEDYNE OLDHAM SIMTRONICS MX32 - RS485 Digital Output and Modbus Communication; RS485 Communication Card Description

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MX32v2

ANALOG AND DIGITAL CONTROLLER

USER MANUAL

NP32V2EN

Revision D.0

12 RS485 Digital Output

The

MX32v2

units using the

RS485 Modbus

option are equipped with a communication card

(code 6451680), which is affixed to the motherboard. This card generates a RS485 output in

Modbus RTU

format.

12.1 Card description

Figure 41: RS485 card

Rep.

Function

A. Operating LEDs. The

LED lights up when a data thread is received. The

LED

indicates that the card has power and turns off when data is being transmitted out.

B. Connection terminal:

A = Tx or +RS485

B = Rx or –RS485

C. End Of Line (EOL) resistance. Set the switch to the EOL position for the unit that is the

last module in the RS485 network. For other units, set the switch to NO EOL.

The RS485 output can be configured using the

COM 32

software, or using unit menu

2.4

Program >RS485 Port

(see page 45).