ABB RER620 - Page 567

1MAC309294-MB F Section 12
Relay physical connections
RER620 561
Technical Manual
Table 440: EIA-232 connections (X6)
Table 441: EIA-485 connections (X6)
Table 442: EIA-485 connections (X5)
Pin EIA-232
1 DCD
2RxD
3TxD
4DTR
5AGND
6-
7RTS
8CTS
Pin 2-wire mode 4-wire mode
1- Rx/+
6- Rx/-
7 B/- Tx/-
8 A/+ Tx/+
Pin 2-wire mode 4-wire mode
9- Rx/+
8- Rx/-
7 A/+ Tx/+
6 B/- Tx/-
5 AGND (isolated ground)
4IRIG-B +
3IRIG-B -
2-
1GND (case)