Instructions

11
As the OC terminal will be the joint point (reference), the O1 and O2 terminals are used
as insulated outputs. As it can be seen from the following figure, these Open Collector
outputs should be fed by an external supply for operation.
Analog Output Terminals: AOC, AVO, AIO
As the AOC terminal will be the joint point (reference), the analogue current or voltage
output is ensured respectively through the AIO and AVO terminals. Only one of the
AVO and AIO terminals are used at the same time.
Communication Terminals: A(+), B(-), GND, TR
RS-485 communication terminals are used for A(+) and B(-) communication
connection. As the communication distance becomes longer, the TR terminal and GND
terminal are short-circuited and 120 ohm line termination resistance is activated and
line stabilization is completed.
5-30 VDC
Relay Coil
MPR 2X
OC
O1
O2