Wago Ethernet switches feature alarm contact
A
Wago Corp product story
Edited by the Engineeringtalk editorial team
Jul 17, 2009
Wago Corporation's 852 series of Ethernet switches offers an alarm contact, enabled via a dip switch, to signal an error condition on the switch.
This feature is standard on both managed and unmanaged switches (non-ECO versions).
The power input connector on the switch has two dedicated alarm circuit connections that can be wired to any warning device, such as a PLC or a pilot light.
Error conditions that can be monitored include port link failure (a cable disconnection or a network disruption, for example), power supply disruption/disconnection or situations where the power supply voltage is out of specified range (9-48V).
Dean Norton, marketing manager at Wago, said: 'The alarm contact feature is a small but extremely useful feature in today's factory and process automation applications.
'For example, the alarm circuit could be wired to the input of a PLC and be monitored by that PLC and a procedure created in the PLC code to handle the fault condition.
'As a result, downtime can be minimised,' he added.
Wago is a provider of spring pressure connection technology that eliminates loose wires as a result of vibration and temperature cycling, as well as providing highly reliable, corrosion-resistant and maintenance-free connections.
Its complete line of spring pressure connection products includes DIN-rail-mount terminal blocks, chassis-mount terminal blocks, PCB-mount terminal blocks, relays, signal conditioners, power supplies, surge suppressors and the Wago-I/O-System.
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