ABB REU 610 Technical Reference Manual page 120

REU 610
120
Voltage Relay
Technical Reference Manual
Optional communication modules and protocols
SPA-bus, IEC 60870-5-103, Modbus® (RTU and ASCII):
*
Plastic fibre
*
Plastic and Glass fibre
*
RS485
*
DNP 3.0:
*
RS485 including DNP 3.0 protocol
*
Auxiliary voltage
The relay requires a secured auxiliary voltage supply to operate. The internal power
supply of the relay forms the voltages required by the relay electronics. The power
supply is a galvanically isolated (flyback-type) DC/DC converter. When the
auxiliary voltage is connected, the green indicator LED (ready) on the front panel is
lit. For detailed information on power supply, refer to Table 5.2.3.-2.
The primary side of the power supply is protected with a fuse located on the printed
circuit board of the relay.
1MRS755769