Installing The Em - Siemens SIMATIC S7-200 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-49.
Table A-49 EM 241 Modem Module Compatibility with S7-200 CPUs
CPU
CPU 222 Rel. 1.10 or greater
CPU 224 Rel. 1.10 or greater
CPU 224XP Rel 2.0 or greater
CPU 226 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-50. 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
Figure A-33 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.
Technical Specifications
CPU 222 DC/DC/DC and CPU 222 AC/DC/Relay
CPU 224 DC/DC/DC and CPU 224 AC/DC/Relay
CPU 224XP DC/DC/DC and CPU 224XP DC/DC/Relay
CPU 226 DC/DC/DC and CPU 226 AC/DC/Relay
Table A-50
Country Codes Supported by EM 241
Code
00 Australia
01 Austria
02 Belgium
05 Canada
06 China
08 Denmark
09 Finland
10 France
11 Germany
12 Greece
16 Ireland
18 Italy
22 Luxembourg
25 Netherlands
26 New Zealand
27 Norway
30 Portugal
34 Spain
35 Sweden
36 Switzerland
38 U.K.
39 U.S.A.
1 2 3 4 5
Figure A-33 View of RJ11 Jack
Description
Country Telecom Standard
ACA TS- -002
CTR21
CTR21
IC CS03
GB3482
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
PTC 200
CTR21
CTR21
CTR21
CTR21
CTR21
CTR21
FCC Part 68
Pin Description
6
3 Ring
4 Tip
Reverse connection is allowed.
Appendix A
451