- Width: 8,8 mm
- Nominal voltage: AC, AC/DC
- Thermal current Ith max.: 3 A
Interface relays - links between logic and load
Electronic control units have been inherent parts of advanced automation technology for a long time. Already in the early seventies, they superseded bit by bit contactor and relay control systems that were usual by then. With them, the power consumption of control systems working with extra-low voltage could be reduced to a minimum. However, the energy demand of the power level for driving motors, magnetic clutches or hydraulic cylinders has not changed up to now. They still need a high amount of electrical energy.
Therefore, coupling relays undertake the required interface between logic and power levels. Moreover, they guarantee a protective separation. So, coupling relays are perfect connecting links between the highly sensitive logic level of a PLC, control system or process computer working almost without electric power and the rough machine operation.
Latching relays for switchgear in power engineering - Latching relay UG 8851
The latching relay UG 8851 is designed with a wide AC/DC nominal voltage range. Short pulses of several miliseconds switch the relay into a defined position. To change the contact position only low power is necessary. No energy is necessary to hold the relay in ON-state. This is energy efficientand reduces the powerdissipation of the unit. On loss of power the relay stays in it's defined position. The special feature of forcibly guided contacts (IEC 61810-3) allows safe monitoring of the contact state.
Technical contribution - Bistable switching characteristics with forcibly guided contacts