Function 21 [t-head2]

Fleeting contact on energization

After the voltage Us has been applied to A1 and A2, the changeover contact of the output relay goes to position 15-18 (25-28) and remains actuated for as long as the set fleeting contact time.

A fleeting pulse (terminals 15-18, 25-28) of defined duration is therefore produced from a two-wire control process (voltage on A1/A2) by this function.