3.17 2-channel MODBUS Master Communication Module KM621S/E
KM621S/E is 2-channel redundant master communication Module, it communicates with a variety of slave
devices by MODBUS.
3.17.1 Functions
Support standard MODBUS bus protocol
Support 2-channel redundant configuration and communication
Each channel can be connected with eight MODBUS slave devices with redundant communication
interfaces
3.17.2. Panel
Running indicator
Green: In working
Dark: Abnormal
Slave communication indicator
Green: The communication of
MODBUS slaves are working nomally.
Slow flash: The communication of
MODBUS slaves are all in fault.
Dark: Slaves are not configured.
Communication indicator
Green: Redundant IO network is working
normally.
Flash: One of IO networks is in fault
Dark: Two IO networks are all in fault
Fault indicator
Dark: Module is working normally
Flash: Modules occur faults
3.17.3. Technical specifications
CPU is isolated with MODBUS communication interface, isolated voltage>1500V
physical layer interface:RS485
Communication Baud rate:2400bps～115200bps
Max power consumption: 5W
Operating environment temperature: -25℃～65℃
Storage temperature: -40℃～+85℃ Relative humidity: 5%～95% (non-condensing)
