Siemens Simatic S7-200 System Manual page 398

S7-200 Programmable Controller System Manual
S7-200 CPUs that Support Intelligent Modules
The EM 241 Modem module is an intelligent expansion module designed to work with the S7-200 CPUs
shown in Table A-45.
Table A-45
CPU 222 Rel. 1.10 or greater
CPU 224 Rel. 1.10 or greater
CPU 226 Rel. 1.00 or greater
CPU 226XM Rel. 1.00 or greater
Installing the EM 241
Follow these steps to install the EM 241:
1. Snap the EM 241 on the DIN rail and plug
in the ribbon cable.
2. Connect 24 VDC from the CPU sensor
supply or external source, and connect the
ground terminal to your system earth
ground.
3. Plug the phone line into the RJ11 jack.
4. Set the country code switches according to
Table A-46. You must set the switches
before power is applied to the CPU for the
correct country code to be read.
5. Power the CPU. The green MG (Module
Good) light should come on.
Your EM 241 is now ready to communicate.
RJ11 Jack
A
Figure A-27 shows the details of the RJ11 Jack.
You can use adaptors to other standard
telephone connectors. Refer to your adaptor
connector documentation for more information.
Caution
Lightning surges or other unexpected high voltages on the telephone line can damage your EM 241
Modem Module.
Use a commercially available telephone line surge protector, such as are commonly sold for protection
of personal computer modems. Surge protectors can be damaged as they protect your EM 241 Modem
Module. Choose a surge protector with a positive indicator that shows it is functional.
Check your surge protector regularly to ensure that your EM 241 Modem Module continues to be
protected.
386
EM 241 Modem Module Compatibility with S7-200 CPUs
CPU
CPU 222 DC/DC/DC and CPU 222 AC/DC/Relay
CPU 224 DC/DC/DC and CPU 224 AC/DC/Relay
CPU 226 DC/DC/DC and CPU 226 AC/DC/Relay
CPU 226XM DC/DC/DC and CPU 226XM AC/DC/Relay
Description
Table A-46 Country Codes Supported by the
EM 241
Code Country
01 Austria
02 Belgium
05 Canada
08 Denmark
09 Finland
10 France
11 Germany
12 Greece
16 Ireland
18 Italy
22 Luxembourg
25 Netherlands
27 Norway
30 Portugal
34 Spain
35 Sweden
36 Switzerland
38 U.K.
39 U.S.A.
1 2 3 4 5 6
Figure A-27 View of RJ11 Jack
Telecom Standard
CTR21
CTR21
IC CS03
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
FCC Part 68
Pin Description
3 Ring
4 Tip
Reverse connection is allowed.