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CONNECTOR PIN ASSIGNMENTS
The modem and auxiliary port connector pin assignments are listed below. The
RS-232 interface cables must not have any wires running to pins 9, 14, 18,24,
or 25 of the modem port. All other pins are ignored.
Modem
Pin
Signal
1 Shield Ground
2 Transmit Data
3 Receive Data
4 Request to Send (held high)
5 Clear to Send
7 Signal Ground
8 Data Carrier Detect
9
14
18
20
24
25
]
Leave disconnected
*
Data Terminal Ready (DTR)
]
Leave disconnected
*
Aux.
Pin
Signal
Shield ground
3 Transmit Data to Printer
6 Data Set Ready (held high)
7 Signal Ground
20 Printer Ready (DTR)
*
DO NOT USE. If connected, improper video
display will result.
Auxiliary pin 20 must be active high when the printer is ready to receive data.
46 Connector Pin Assignments
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