Siemens SIMATIC S7-1200 CP 1243-8 IRC Operating Instructions Manual page 211

The following standard connecting cables are available for connection to this D-sub
connector.
Table C- 1 Connectable standard cables for the RS-232 interface of the TS Module RS232
Order no. Description
6NH7701-4AL Cable for connecting the TS module with one of the SINAUT
ST7 modems MD2, MD3 or MD4 (RS-232)
Cable length 1.5 m
6NH7701-5AN Cable for connecting the TS module to the GSM modem
MD720 (RS-232). Also suitable for third-party modems or
wireless devices with a standard RS-232 interface.
Cable length 2.5 m
6NH7701-4BN Cable with one end without connector for connecting the TS
module (RS-232) to a third-party modem or wireless device
(RS-232)
Cable length 2.5 m
The following figures show the assembly of the connecting cables.
Figure C-7
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
Assembly of the standard connecting cable 6NH7701-4AL
C.4 Connecting cables
Illustration
Accessories
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