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DeltaV – PLC/SLC Electrical Interface
The electrical interface between DeltaV and the PLC-3, PLC-5 and SLC 5/XX conforms to
the RS-232 protocol and RS-422/485 protocol. The cabling should not exceed 50 feet for
the RS-232 protocol or 4000 feet for the RS-422/485 protocol.
In 6.1 and 6.2 the pin assignments for the PSIC Serial Terminal Block are listed for the
RS-232 protocol and the RS-422/485 protocol. Pins 1 - 8 are for Port 1 connections and
Pins 9 - 16 are for Port 2 connections
6.1 RS-232 Pin Assignments for DeltaV PSIC
Terminal Number Signal Description
1
Port 1 - Isolated Ground (GND)
2
Unused
3
Port 1 - Transmit Data (TXD)
4
Unused
5
Port 1 - Receive Data (RXD)
6
Unused
7
Port 1 - Data Terminal Ready (DTR)
8
Port 1 - Dataset Ready (DSR)
9
Port 2 - Isolated Ground (GND)
10
Unused
11
Port 2 - Transmit Data (TXD)
12
Unused
13
Port 2 - Receive Data (RXD)
14
Unused
15
Port 2 - Data Terminal Ready (DTR)
16
Port 2 - Dataset Ready (DSR)
