Siemens ET 200S Manual page 409

12.2.3 Notes on and Circuits of Unused Channels of the Analog Input
Modules
S Deactivate unused input channels during parameter assignment.
S A deactivated channel always returns a value of 7FFF
S In the case of the standard modules 2AI U, 2AI I 2WIRE, 2AI I 4WIRE,
2AI RTD Standard, 2AI RTD High Feature, 2AI TC Standard, and 2AI TC High
Feature, the cycle time of the module is halved.
S In the case of the high-speed modules 2AI U, 2AI I 2WIRE, and 2AI I 4WIRE,
the cycle time remains unchanged at 1 ms.
S To adhere to the permissible potential differences (U
on the terminal module for the unused channels. This is necessary in the case
of the following modules:
Analog input module
2AI U Standard
2AI RTD Standard, 2AI RTD High
Feature, 2AI TC High Feature
2AI TC Standard
2AI U High Speed
12.3 Behavior of the Analog Modules During Operation and in
the Event of Problems
This section deals with the following topics:
S The dependence of the analog input and output values on the supply voltage of
the electronic module and on the operating modes of the PLC
S The behavior of the analog electronic modules depending on the position of the
analog values in the respective value range
S The effect of errors on the analog inputs/outputs
S Use of the shield contact
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Analog Electronic Modules
H
CM
TM terminal
Channel 0
1 2 3 4
.
), you must wire jumpers
Channel 1
5 6 7 8
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