Collective fault indicator, expansion device, open circuit principle (output relay activated in the event of a fault), closed circuit principle (output relay not activated in the event of a fault) of the 4 inputs adjustable via bridges X1-X2, response delay of the signal inputs 1s, front-side acknowledgement button QH for external alarm device, 4 fault signal inputs with LED in the device, operating voltage AC/DC 24VType IL5991, Art. No. 0050350
