Key Features

• Simple DIN-rail mounting

• Class I Equipment, (when connected to Protective Earth, (PE))

• Over-voltage Category III for connection to primary main TN network

• Protective separation of secondary circuit from primary circuit

• Accepted for SELV and PELV applications

• The output of the units is protected against over

current (current limit) and over voltage (OVP)

• SD834 can be connected in parallel to increase output power

• Both a.c. and d.c. input at SD831 and SD834

• Floating DC-OK relay contact at SD834

The Voting Unit separates the redundant Power Supply Units, supervises the voltage supplied, and

generates supervision signals to be connected to the power consumer.

Green LED’s, mounted on the front panel of the voting unit, provide a visual indication that the correct

output voltage is being delivered. Simultaneously

with the green LED illuminating, a voltage free contact closes the path to the corresponding “OK

connector”. Voting Unit trip levels, are factory preset.