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5-1-4 Modbus RTU terminals (1) - (4)
(1) FG terminal
Frame ground terminal for Modbus. Connects the Modbus cable shield here.
(2) (3) RS-485 terminals
A and B terminals for the RS-485, that the Modbus RTU uses.
(4) SG terminal
Signal ground terminal for the RS-485.
5-1-5 Sensor input terminals (5) - (9), (16) - (18)
(5) Sensor power output terminal (EXC+)
Positive excitation terminal for the sensors.
(6) Remote s input terminal (SEN+)
Connects to EXC+ when 4-wire sensors are used.
(7) Sensor power supply - output terminal (EXC-)
Negative excitation terminal for the sensors.
(8) Remote sensing - input terminal (SEN-)
Connects to EXC- when 4-wire sensors are used.
(9) (18) FG terminals
Frame ground terminals for the sensor input. Connect the sensor cable shield here.
(16) input terminal (SIG+)
Positive signal input terminal for the sensors.
(17) Sensor - input terminal (SIG-)
Negative signal input terminal for the sensors.
Connecting the sensors
Use 6-wire shielded cables to connect sensors. If 4-wire sensors are used,
connecting long cables to the sensors will increase the total cable resistance and
cause measurement errors. Keep these cables away from power cables and other
electrically noisy cables.
Connecting the 4-wire sensors
When connecting the 4-wire sensors, be sure to make a connection between EXC+
and SEN+, and between EXC- and SEN-. Without these connections,
measurement will not be performed.
