Model 905-Control relay For magnetic snap-action contacts-Wika, Germany

Model 905
Control relay
For magnetic snap-action contacts

Applications

Amplification of switching current
Increasing the lifetime

pecial Features

905.12 for 1 contact, output: 1 x SPDT
905.13 for 2 contacts, output: 2 x SPDT
905.14 for 2 contacts, output: 1 x SPDT intermittent, e.g. for pump control
Power supply 230Vac – 45.. 60Hz – 2,5VA
Electrical rating: 250Vac/8A/1840VA (min. 24Vdc/0,1A)
Drop out delay: 500ms
Auxiliary output: 24Vdc – 20mA
Ambient temperature 0.. +70°C
Ingressprotection IP 40 (terminals IP 20)
Hat rail mounting

Description

• Contact protection relays are used in type 821 contact devices. They increase the switching reliability and switching capacity of electromechanical contact devices and lower their contact voltage. Undesired switching operations of contact devices caused by vibrations are significantly reduced by a drop-out delay of 0.5 sec.
• On the side of the contact they operate with a lower control voltage, however, on the output side they can be highly loaded.
• Contact protection relays consist of a power supply unit, control unit, switching amplifier and relay output. The contacts are supplied by a control unit with 35 to 40 V clocked DC (i.e. only every hundredth switching occurs under voltage). This enables the optimum contact protection and switching reliability for millions of switching cycles.