Features Of The Modem Module - Siemens SIMATIC S7-200 System Manual

S7-200 Programmable Controller System Manual

Features of the Modem Module

The Modem module allows you to connect your S7-200 directly to an analog telephone line and
provides the following features:
Provides international telephone line
-
interface
Provides a modem interface to
-
STEP 7--Micro/WIN for programming
and troubleshooting (teleservice)
Supports the Modbus RTU protocol
-
Supports numeric and text paging
-
Supports SMS messaging
-
Allows CPU-to-CPU or CPU-to
-
Modbus data transfers
Provides password protection
-
Provides security callback Provides security callback
- -
The Modem module configuration is stored in the CPU
-
You can use the STEP 7--Micro/WIN Modem Expansion wizard to configure the Modem module.
Refer to Appendix A for the specifications of the Modem module.
International Telephone Line Interface
The Modem module is a standard V.34
(33.6 kBaud), 10-bit modem, and is
compatible with most internal and
external PC modems. The Modem
module does not communicate with module does not communicate with
11-bit modems.
You connect the Modem module to the
telephone line with the six-position four-wire
RJ11 connector mounted on the front of the
module. See Figure 10-2.
An adapter may be required to convert the
RJ11 connector for connection to the
standard telephone line termination in the
various countries. Refer to the
documentation for your adapter connector
for more information.
The modem and telephone line interface is
powered from an external 24 VDC supply.
This can be connected to the CPU sensor
supply or to an external source. Connect
the ground terminal on the Modem module
to the system earth ground.
The Modem module automatically
configures the telephone interface for
country-specific operation when power is
applied to the module. The two rotary
switches on the front of the module select
the country code. You must set the
switches to the desired country selection
before the Modem module is powered up.
Refer to Table 10-1 for switch settings for
the countries supported.
308
Country Code
Switches
Figure 10-1 EM 241 Modem Module
Pin Description
123456
3 Ring
4 Tip
Figure 10-2 View of RJ11 Jack
Table 10-1 Countries Supported by the EM 241
Switch Setting
00
01
02
05
06
08
09
10
11
12
16
18
22
25
26
27
30
34
35
36
38
39
Reverse connection
is allowed.
Country
Australia
Austria
Belgium
Canada
China
Denmark
Finland
France
Germany
Greece
Ireland
Italy
Luxembourg
Netherlands
New Zealand
Norway
Portugal
Spain
Sweden
Switzerland
U.K.
U.S.A.