Configurable Limit Switch

Operating Instructions

Setting of the Switching Limits, LED control light

The two switching limits, "high" and "low" are each set by a potentiometer (approx. 12 rotations) on the front plate. The three light diodes indicate whether the input signal lies below the "low" limiting value, between the two values (in the window between "low" and "high") or above the "high" limit value.

Setting the DIL switches

Note: switches 2 and 3 must not simultaneously be "on".

Operating Modes

1. Simple Limit Switch: the lower limiting value ("low") controls relay 1, the upper limiting value ("high") controls relay 2 (if present). The two limiting values (relays) are independent.
2. Window Comparator
3. Two Position Controller: The switching points (hysteresis) are set via the two limiting values "low" and "high". Applications include fullness controller ("low": on, "high": off).

Factory Settings

Note: when switching inductive loads (e.g., coils/transformers, motors) overvoltages occur which can lead to EMC problems and in some cases even to destruction of the relay contacts. These overvoltage spikes must be suppressed by suitable electronics at the load (e.g., RC-circuit or varistor).

For calibration of measurement range and zero point see General Operating Instructions

For EMC and cabling guidelines see Cabling and Installation Requirements