Siemens CP 1243-8 IRC Operating Instructions Manual page 125

Due to the design, the modems can be installed on an S7-300 standard rail. As an
alternative, the modems can also be installed on a 35 mm standard mounting rail. In this
case, the adapter is required that can be ordered separately.
The following figure shows the modem modules with further details (schematic
representation with the covers removed).
Figure C-4
The modems are supplied along with the listed WAN connecting cable.
Table C- 1
Short name
MD2
MD3
MD4
R-ADAPT
* You will find the description of the plug-in cables in the section Cables for the WAN
connection of the modems (Page 133).
CP 1243-8 IRC
Operating Instructions, 06/2015, C79000-G8976-C385-01
Connectors of the modems
Overview of the classic modem variants
Article number
6NH7810-0AA20
6NH7810-0AA30
6NH7810-0AA40
6NH7760-0AA
Description
Dedicated line modem, with RS-232/RS-485 interface, for
multipoint connection, can be tapped, can also be used as
a repeater, max 19200 bps
Including plug-in cable 6NH7700-2AR60 (RJ-12-RJ-12),
length 6 m, for connecting MD2 with LTOP. *
Modem for the analog telephone network, with RS-232/RS-
485 interface, max. 33600 bps.
Can also be used as a dedicated line modem for a point-to-
point link, max. 33600 bps in the voice band.
Including plug-in cable 6NH7700-3BR60 (RJ-12-RJ-
12/TAE6), length 6 m, for connecting MD3 with a telephone
socket (TAE6 or RJ-12) or LTOP (in standard operation). *
Modem for the digital ISDN network, with RS-232/RS-485
interface, max. 64000 bps.
Including plug-in cable 6NH7700-4AR60 (RJ-12-RJ-45),
length 6 m, for connecting MD2 (RJ-12) with an ISDN-S
socket (RJ-45). *
Adapter for mounting the modems MD2/MD3/M4 on a 35
mm DIN standard rail
Accessories
C.2 Modems
0
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