Chapter 3 Installation and Wiring 3.2 Communication Please wire a load cell module according to the definitions of the pins in a communication connector. 8 PIN MINI DIN 9 PIN D-SUB female PC COM Port DVP211LC COM Port Rx 2 4 3 GND Tx Tx 5 Rx 3 4 5 1 2 5 7 8 8 1,2 GND 5V 6 7 8 1 4 6 There are 2 communication interfaces in a load cell module which can communicate with a PC or other devices. COM1 is an RS-232 port, and COM2 is an RS-485 port. Both ports meet the standard MODBUS protocol. A PC can directly communicate with a load cell module through COM1. Delta power supply modules are highly recommended. RS232 RS-232 3-3