Supplementary Components; Mounting Guidelines And Noise Immunity - Siemens SIMADYN D Hardware Manual

Communications support modules

6.8.3 Supplementary components

6.8.4 Mounting guidelines and noise immunity

Front panel
grounding with
CS7
Cable
screen
Other information
6-36
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• SM8 connector parts set (26 pin, high-density plug connector)
• interface module:
A 40-pin dual inline socket X51 is provided in the communications
module. An interface module can be inserted in this socket in order to
implement an RS 485 (for USS) or 20mA interface instead of the existing
RS 232.
− interface module SS1 (20 mA)
− interface module SS2 (RS 232)
− interface module SS31 (RS 485)
When inserting the interface module, the mounting position must be
observed:
The recesses of the socket of the interface module (and pin 1, marked by
the point) and that of the socket on the SS4 (X51) must coincide.
The front panel of the communications module must be connected to the
front panel of the CS7 using the cables provided with the CS7.
The data transfer cable screen (bus cable) must be grounded to a grounding
rail through the largest possible surface area where the cable enters the
equipment. In addition, the screen must be connected to the housing in the
connector housing. The connector must be screwed to the communications
module.
Further information on EMC and ambient conditions, refer to Section
„General technical data"
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Industry Automation
Hardware - SIMADYN D
Edition 12.2004
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