ABB REU 610 Technical Reference Manual page 56

REU 610
56
Voltage Relay
Technical Reference Manual
and glass) or RS-485 connection. The relay is connected to an automation system
via the rear connection. The optional rear communication module allows the use of
either the SPA bus, IEC 60870-5-103 or Modbus communication protocol.
For connection to the DNP 3.0 communication system, the relay can be provided
with an optional DNP 3.0 rear communication module with RS-485 connection. For
further information on optional rear communication module connections, refer to
Section 5.2.2. Serial communication connections.
Fig. 5.1.13.-1 Communication port
1) Front connection for local communication
The relay is connected to a PC used for local parameterization via the infrared port
on the front panel. The front connection allows the use of the SPA bus protocol only.
The optical front connection galvanically isolates the PC from the relay. The front
connection can be used in two different ways: wirelessly using a PC compatible to
‚ Standard specifications or using a specific front communication cable
®
the IrDA
(refer to Section ). The cable is connected to the serial RS-232 port of the PC. The
optical stage of the cable is powered by RS-232 control signals. The cable has a
fixed baud rate of 9.6 kbps.
The following serial communication parameters are to be set for RS-232:
Number of data bits: 7
*
Number of stop bits: 1
*
Parity: even
*
Baud rate: 9.6 kbps
*
Relay data such as events, setting values and all input data and memorized values
can be read via the front communication port.
When setting values are altered via the front communication port, the relay checks
that the entered parameter values are within the permitted setting range. If an entered
value is too high or too low, the setting value remains unchanged.
1MRS755769
A051551