Installing the Gas Analyzer 87
Electrical Connections Modbus Module
RS232 Interface
Pin Signal
2 RxD
3 TxD
5 GND
Design: 9-pole male Sub-D plug
RS485 Interface
Pin Signal
2 RTxD–
3 RTxD+
5 GND
Design: 9-pole female Sub-D plug
NOTE
For detailed Information on "Modbus", refer to the Technical Information
"EL3000, EL3060, EL3010-C – Modbus".