Serial Communication Module
The rack-slot based serial communication module is used to
communicate to serial based controllers. The module can be used to
communicate to Modbus RTU Slave, Modbus RTU Master, Modbus
ASCII Slave, Modbus ASCII Master and user defined protocol type
devices. It contains one Multi-SPI at 4MBps of maximum
communication code rate. Also it supports short circuit protection
and over voltage protection. The galvanic isolation is 2000 VDC.
There are two DB9 connectors for RS232 and a dual-row terminal
connector for RS485 shown in the following figure.
As indicated in this figure, Serial Communication Module includes:
Table 5-10: Serial Communication Module Components
Item Description
1 Module Status LED indicator for the Serial Communication Module. See
"Serial Communication Module Indicators" on page1 for more information.
2 RS232 LED indicator for the Serial Communication Module. See "Serial
Communication Module Indicators" on page171 for more information.
3 RS232 Ports (two)
4 RS485 LED indicators for the Serial Communication Module. See "Serial
84
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