HEIDENHAIN SHB Data Interfaces for HEIDENHAIN - Manual (Page 13)

3 – 14 HEIDENHAIN Service Manual for Data Interfaces
3.2 Connector Designations and Layouts of TNC 122, TNC 2xx, TNC 3xx,
TNC 4xx, CNC xxx
3.2.1 RS-232-C/V.24 data interface, 25-pin, D-sub
Flange socket with female insert
Pin no. Assignment Designation
1 Shield Chassis Ground
2 RxD Receive Data
3 TxD Transmit Data
4 CTS Clear to Send
5 RTS Request to Send
6 DTR Data Terminal Ready
7 GND (0 V *2) Signal Ground
8 to 19 Not assigned
20 DSR Data Set Ready
21 to 25 Not assigned
Chassis External shield = Chassis
Control model RS-232-C/V.24 connector
X21 X25 X6 X26
TNC 122 x
TNC 246 x
TNC 2500/B/C x
TNC 306 x
TNC 335 x
TNC 351/355 x
TNC 360 x
TNC 406 x
TNC 407 x
TNC 410 x
TNC 415/B x
TNC 425 x
TNC 426 x
TNC 430 x
CNC 232B x
CNC 234.xxx x
CNC 332 x