Connector Pin-Outs; Communication Connectors; Power Connector - NCR 7158 Owner's Manual

6-8 Chapter 6: Communication Interface

Connector Pin-outs

This section describes the pin settings for the connectors on the back of
the printer.

Communication Connectors

The following illustrations show the RS-232C communication
connectors and pin assignments. The connectors are located at the rear
of the printer, and are specified as: male DB9, 9-pin or female DB-25, 25
pin D-shell, with RTS and CTS pins connected.
DSR 6
RTS 7
CTS 8
Not Used 9
Shell-Frame Ground

Power Connector

With RS-232C, the printer is always remotely powered. The following
illustration shows the power cable connector and pin assignments. The
power cable connector is a 3-pin plug and is located at the rear of the
printer.
Function Pin Numbers Function
+24 Volt 2
Shell - Shield
9-pin DB-9 Connector
1 Not Used
2 RXD
3 TXD
4 DTR
5 Logic Ground
3 Not Used
1 Ground