Rs485 Communication Module; Communication Module Modbus Rtu - meibes Rossweiner heatsonic Manual Del Usuario

7. Expansion modules
7.2.4

RS485 Communication module

The RS485 communication module is a serial interface for communication with external devices, e.g. PC; 2400
bauds.
The module contains a 4-pole
terminal strip with terminals
marked D+, D-, +12 V and
GND. The module requires
an external supply voltage of
12 VDC ±5 V.
7.2.5

Communication module Modbus RTU

• Polarity independent:
Connections 60 and 61
• External power supply:
12-24 V AC/DC
• Energy consumption: max. 150 mW
• Connection 90 (not inverted, +)
• Connection 91 (inverted,+)
• Communications protocol:
Modbus RTU
• Channel EIA-485 (electrically isolated)
• Flexible data format:
Standard 9600 bits/s, 8N1,
Modbus Slave ID-1
40