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B8976111/02
2 Technical Description and Installation Guidelines
This chapter outlines the performance of the CP 142-2, explains how to install the module and
introduces you to its basic functions.
You will learn the following:
How to install the CP 142-2.
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Which modes are supported by the CP 142-2.
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When handling and installing the module, please keep to the general guidelines for
handling electrostatically sensitive devices and follow the instructions in the 'ET 200X
Distributed I/O System' manual /4/.
Insert or remove modules only when the power is turned off.
Noise immunity/grounding
To ensure the noise immunity of the CP 142-2, the ET 200X distributed I/O system and
the AS-i power supply unit must be correctly grounded.
The CP 142-2 cannot be operated with all variants of the basic modules of the ET 200X
distributed I/O system. Please read the accompanying Product Information.
The AS-i power supply unit used must provide a low voltage, safely isolated from the
network. This safe isolation can be implemented according to the following
requirements:
VDE 0100 Part 410 = HD 384-4-4 = IEC 364-4-41
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(as functional extra-low voltage with safe isolation) or
VDE 0805 = EN 60950 = IEC 950
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(as safety extra-low voltage - SELV) or
VDE 0106 Part 101
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2-1
AS-i Master Module CP 142-2
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