IFM Electronic CR0403 - Configure Inputs; Safety Instructions about Reed Relays

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ifm Programming Manual ecomatmobile BasicController (CR0403) Runtime System V03.02 2015-04-01
Configurations Function configuration of the inputs and outputs
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4.4.1 Configure inputs
Safety instructions about Reed relays ................................................................................................. 48
Configure the software filters of the inputs .......................................................................................... 49
Analogue inputs: configuration and diagnosis ..................................................................................... 50
Binary inputs: configuration and diagnosis .......................................................................................... 51
Fast inputs ........................................................................................................................................... 52
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Valid operating modes → chapter Possible operating modes inputs/outputs (→ page 207)
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Safety instructions about Reed relays
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For use of non-electronic switches please note the following:
Contacts of Reed relays may be clogged (reversibly) if connected to the device inputs without
series resistor.
► Remedy: Install a series resistor for the Reed relay:
Series resistor = max. input voltage / permissible current in the Reed relay
Example: 32 V / 500 mA = 64 Ohm
► The series resistor must not exceed 5 % of the input resistance RE of the device input (→ data
sheet). Otherwise, the signal will not be detected as TRUE.
Example:
RE = 3 000 Ohm
⇒ max. series resistor = 150 Ohm