IBM 6400-D Generation II Series, Setup Manual

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Chapter 5
RS-232 And RS-422 Serial Interfaces
Table 1. RS-232 Serial Interface Connector Pin Assignments
Table 2. RS-422 Serial Interface Connector Pin Assignments
RS-232 And RS-422 Serial Interface Signals
The RS-232 connector mounted on the printer is a 25-pin DB-25S type. The
mating connector is a DB-25P. RS-232 and RS-422 compatible serial
interface signals are defined as follows:
RS-232:
Received Data (RD) — Serial data stream to the printer.
Transmitted Data (TD) — Serial data stream from the printer for transmitting
status and control information to the host. Subject to protocol selection.
Request To Send (RTS) — Control signal from the printer. Subject to
configuration.
Clear To Send (CTS) — Status signal to the printer indicating the host is
ready to receive data/status signals from the printer.
Data Set Ready (DSR) — Status signal to the printer indicating the host is in
a ready condition.
Data Carrier Detect (DCD) — Status signal to the printer. The ON condition
is required for the printer to receive data.
Data Terminal Ready (DTR) — Control signal from the printer. Subject to
configuration.
RS-422:
+RD, -RD — Serial data stream deferentially received by printer.
+TD, -TD — Deferentially driven serial data stream for transmitting status and
control information.
NOTE: ±RD and ±TD form signal and return paths of a differential line signal.
Input Signals
Signal Pin
Output Signals
Signal Pin
Miscellaneous
Signal Pin
Received Data (RD) 3 Transmit Data (TD) 2 Chassis Ground 1
Clear To Send (CTS) 5 Request To Send (RTS) 4 Signal Ground 7
Data Set Ready (DSR) 6 Data Terminal Ready (DTR)20
Data Carrier Detect (DCD) 8
Input Signals
Signal Pin
Output Signals
Signal Pin
Miscellaneous
Signal Pin
- Receive Data (-RD) 15 - Transmit Data (-TD) 19 Chassis Ground 1
+ Receive Data (+RD) 17 + Transmit Data (+TD) 25 Signal Ground 7