Dascom T2150 User Guide - Manual (Page 157)

User guide Interfaces
147
Serial interface
V.24/RS232C
Your printer’s serial interface supports the RS232C specification.
The signals are received and transmitted by a 9 pin connector.
Basically 3 lines are already enough for exchanging information bet-
ween computer and printer (one receive line, one send line, one line
for common grounding).
Connector assignment
Transmission length: max. 15 m
Type RS232C interface
Synchronization Asynchronous
Transmission rate 600 Baud to 19.200 Baud
Signal status OFF (log.1) –3 V to –15 V
ON (log. 0) +3 V to +15 V
Connection cable up to 15 m length
Interface connections ITT Cannon connector,
series DB-9 S
Transmission protocol XON/XOFF, ENQ/STX, READY/
BUSY, Robust XON/XOFF, ETX/
ACK
Capacity of data buffer 512 Byte min. 128 KB max.
Connector no.
Direction
Printer–PC
Signal
3 → TxD
4 → DTR
2 ← RxD
6 ← DSR
7 → RTS
8 ← CTS
5
⎯
Signal Ground SG
Shield ⎯ Frame Ground FG
5 1
9 6