Technical documentation - W.E.ST. Elektronik GmbH

W.E.ST. Elektronik GmbH
General IO description
This description is a general description of the technical data of out open loop and closed loop control
modules. Please check the implemented IO signals via the block diagram about availability.
Power supply
This module is designed for 10… 30 VDC (typical 12 V or 24 V) of a power supply. This power supply
must correspond to the actual EMC standards.
All inductivities at the same power supply (relays, valves …) must be provided with an over voltage protection
(varistors, free-wheel diodes …).
It is recommended to use a regulated power supply (linear or switching mode) for the supply of the module
and the sensors. These power supplies have a clearly lower internal resistance in comparison with
non regulated power supplies and therefore a better spurious rejection.
Power supply : 10… 30 VDC, incl. ripple
Power consumption: 100 mA + solenoid current consumption
External protection: 5 A fast
ATTENTION: Without an external fuse and in case of a continual short-circuit the
module can be destroyed in spite of all internal protections.
Digital inputs
The digital inputs are designed for a voltage level of 12 V and 24 V. The typical connections to the PLC
will not be screened if the modules are arranged carefully and with short cable lengths. As common potential
0V (PIN 4) is used.
All inputs are protected with suppressor diodes and RC-filters against transient overshoots.
Low level: < 2 V
High level: > 10 V
Current: < 0,1 mA
Digital outputs
The digital outputs are designed for a voltage level of 12 V and 24 V. The typical connections to the PLC
will not be screened if the modules are arranged carefully and with short cable lengths. As common potential
0V (PIN 4) is used.
All outputs are protected with suppressor diodes and RC-filters against transient overshoots.
Low level: < 2 V
High level: > 10 V
Current: max. 50 mA (with load of 200 Ohm)
Seite 10 von 22 12.03.2008