Technical documentation
Technical documentation
Technical documentation
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W.E.ST. Elektronik GmbH<br />
General IO description<br />
This description is a general description of the technical data of out open loop and closed loop control<br />
modules. Please check the implemented IO signals via the block diagram about availability.<br />
Power supply<br />
This module is designed for 12… 30 VDC (typical 24 V) of a power supply. This power supply must correspond<br />
to the actual EMC standards.<br />
All inductivities at the same power supply (relays, valves …) must be provided with an over voltage protection<br />
(varistors, free-wheel diodes …).<br />
It is recommended to use a regulated power supply (linear or switching mode) for the supply of the module<br />
and the sensors. These power supplies have a clearly lower internal resistance in comparison with<br />
non regulated power supplies and therefore a better spurious rejection.<br />
Power supply : 12… 30 VDC, incl. ripple<br />
Power consumption: 100 mA<br />
External protection: 1 A medium lag<br />
ATTENTION: Without an external fuse and in case of a continual short-circuit the<br />
module can be destroyed in spite of all internal protections.<br />
Digital inputs<br />
The digital inputs are designed for a voltage level of 12 V and 24 V. The typical connections to the PLC<br />
will not be screened if the modules are arranged carefully and with short cable lengths. As common potential<br />
0V (PIN 4) is used.<br />
All inputs are protected with suppressor diodes and RC-filters against transient overshoots.<br />
Low level: < 4 V<br />
High level: > 12 V<br />
Current: < 0,1 mA<br />
Digital outputs<br />
The digital outputs are designed for a voltage level of 12 V and 24 V. The typical connections to the PLC<br />
will not be screened if the modules are arranged carefully and with short cable lengths. As common potential<br />
0V (PIN 4) is used.<br />
All outputs are protected with suppressor diodes and RC-filters against transient overshoots.<br />
Low level: < 4 V<br />
High level: > 10 V<br />
Current: max. 50 mA (with load of 200 Ohm)<br />
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