IDEC High Performance Series - Manual (Page 283)

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External Device Setup Manual
7.3 Connection Diagram
The connector types given in the Connection Diagrams are for the unit and not the cable. For details regarding wiring, refer
to Chapter 1 "3 Important Points Regarding Wiring" on page 19.
7.3.1 Connection Diagram 1: RS485 2-wire Link Unit to MICRO/I
Screw terminal block D-sub, 9P connector plug type
Screw terminal block Terminal
- We recommend that you switch on the termination resistor on the PLC Link Unit side for long-distance transmission con-
nection cable is available.
- There is no pin number corresponding to TERM on the HG2G-S/-5S/-5F, HG3G/4G. When inserting a termination resis-
tor, use a communication switch. For the setting of the switch, refer to Chapter 1 "3 Important Points Regarding Wiring"
on page 19.
- HG2G-5F, HG3G/4G Series uses only RDA and RDB when using RS422/485 2-wire, you don’t need to connect SDA or
SDB.
If connecting COM1 on the HG2G-5F, HG3G/4G to the external device, do not insert terminating resistor to the external
device. If terminating resistor can not be removed, use COM2 on the HG2G-5F, HG3G/4G instead of COM1.