Onka UK Product Catalogue - Catalog - Page 76
76
ELECTRONIC TERMINAL BLOCKS
600
Reverse Current Protection Module
Coil Reverse Current Protection Module 601
Description: Prevents reverse current in case of DC voltage. When connection of coil circuit is cut off, if any contactor,
relay or valve is used in DC current, reverse electromotive force which reaches 1000V can be generated. The reverse
electromotive force can damage to circuit. This incident is faced in case of coils used in DC current.
602
Lamp Testing Module One Channel
Lamp Testing Module Two Channel 603
Description: Controls whether the lamps in the signal circuits are stable. Signal lamps in electrical panels or leds in mimic
diagrams used in large facilities. However, in case of lamp or led failure, any problem in facilities cannot be emerged. Therefore
stability of these lamps or leds need to be tested periodically. The testing can be applied by a button on lamp testing card. It
is preferred because it is terminal connection where the diode is needed. Diods are used as 1a and 700v.
604 - 605
Voltage Meter
Description: Indicates the on/off action with led for 24VDC or 220VAC in electrical systems
606
Voltage Meter, Reverse Current Dump
Description: Indicates the on/off action with led for 24VDC in electrical systems. Additionally, protects coil with diode
inside against inverse current.
607 - 608
609 - 610
Surge protection (Varistor) 30VAC-75VAC-130VAC-275VAC
Description: Varistor is a resistor. Its resistance can change depends on voltage. Therefore, shunt connection is made
for circuit which is protected. In case of over voltage, short circuit generated and fuse blown.
611-612
613
Voltage Meter, Rectifier 24-110-220VAC
Description: AC current from No: 1 and No: 2 terminals is transmitted to DC current and conducted to No: 3 and No: 4
terminals. This transmission is controlled with led indication.
