HARDWARE MANUAL Document reference MAMPS-HW/E
VM600 machinery protection system (MPS) Edition 18 - March 2022
13 - 16
Connectors on the IOCN card
CONFIGURATION OF CPUM / IOCN CARDS
13.6.3 RS, A and B connectors
The 6-pin 6P6C (RJ12/RJ25) RS connector supports RS-232 or RS-485 communication with
the rack.
The 6-pin 6P6C (RJ12/RJ25) group A and group B connectors support RS-485
communication with the rack. (Alternatively, the group A connectors only can be used to
support RS-232 communication with the rack (see 13.5.1 Linking the RS and A serial
communications connectors)).
The pin connections (pinouts) for the 6-pin 6P6C (RJ12/RJ25) connectors are shown in
Figure 13-15.
The pin connections (pinouts) depend on how the serial communications are configured:
RS-232, half-duplex RS-485 or full-duplex RS-485 (see 13.2 Configuring RS serial
communications and 13.3 Configuring A and B serial communications).
Figure 13-15: Pin definitions for the serial communications connectors on the IOCN card
(RS, A and B connectors)
6P6C (RJ12/RJ25)
connector on the IOCN card
(female)
6
1
Pin Signal
1 Not connected
2 Not connected
3Rx
4Tx
5 Not connected
60VD
Pin Signal
1A
2B
3 Not connected
4 Not connected
5RGND
6 Not connected
Pin Signal
1TxA
2TxB
3RxA
4RxB
5RGND
6 Not connected
(a) RS-232 configured
(b) Half-duplex RS-485 configured
(c) Full-duplex RS-485 configured
Pin
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