References for openvms users, Rs-232c serial cable pin assignments, Rs-422 serial cable pin assignments – Oki RS-422 User Manual
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RS-232C/RS-422 Serial Interface Option
2-7
Serial
References for OpenVMS users
You can print to your laser printer via the serial interface option from an OpenVMS system, either
directly connected to the system or through a network device such as a terminal server.
It is recommended that DECprint Supervisor (DCPS) be used for printing. Please see the "Setting Up
Printers" chapter of the DCPS System Manager’s manual for information on creating a DCPS print
queue.
If DCPS will not be used, please see the "Setting Up and Maintaining Queues" chapter of the OpenVMS
System Manager’s manual for information on setting up print queues using the OpenVMS print sym-
biont.
RS-232C Serial Cable Pin Assignments
Eight pins of the 25-pin serial cable are utilized for the RS-232C standard:
RS-422 Serial Cable Pin Assignments
Five pins of the 25-pin serial cable are utilized for the RS-422 standard:
• • •
Pin No.
Signal
Direction
Description
1
GND
Frame Ground
2
TXD
Out
Transmit Data
3
RXD
In
Receive Data
4
RTS
Request To Send
5
CTS
In
Clear To Send
6
DSR
In
Data Set Ready
7
GND
Logic Ground
20
DTR
Out
Data Terminal Ready
Pin No.
Signal
Direction
Description
1
GND
Frame Ground
15
RXD -
In
Receive Data +
17
RXD +
In
Receive Data -
19
TXD -
Out
Transmit Data -
25
TXD +
Out
Transmit Data +