User guide

Communication Capabiliites
890 USE 108 00 August 2001 75
Connector
Pinouts
(RJ45 to 25-Pin)
The following table describes the connector pinouts of the RJ45 to 25-pin.
Signal Name Pinout Pinout Connected To ... Pinout Signal
Name
+5VDC
(150ma Limit)
11
RXD 4 Yes 2 TXD
TXD 3 Yes 3 RXD
*CTS 7 Jumpered 4 Jumpered DTS
*RTS 6 Jumpered 5 Jumpered CTS
6 Connected to
pins 2 and 20
DSR
GND 5 Yes 7 GND
8DCD
DSR 2 Yes 20 DTR
Chassis
Ground
8 Yes 1 Chassis
Ground
Note: *The Modbus 2 port supports neither CTS nor RTS.
Note: If Pin 1 of either Modbus port 1 or port 2 of the E984-258 or -258C PLC is
shorted to GND, excessive current draw above 150 ma can cause the power
supply and PLC to shut down.