Overload protection

Technical data Please note the information in the technical data regarding load type, max. output current and short circuit current.

When switching on lamp loads, high starting currents occur that are limited by the output circuit of the terminals (see fig. Overload current limitation).

When switching off inductive loads, high induction voltages result from interrupting the current too quickly. These are limited by an integrated free-wheeling diode (switch-off energy [inductive] see Technical data). Since the current reduces only slowly, a delayed switch-off can occur in many control applications. For example, a valve remains open for many milliseconds. Switch-off times are realized that correspond, for instance, to the switch-on time of the coil.

Protection against high induction voltages To protect against voltage peaks such as can occur when switching inductive loads, we recommend to provide suitable protective circuits (e.g. with the free-wheeling diode, RC combination or varistor) directly at the actuator.