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5
5 .2
Electrical connections
The data highway connector is pluggable (with securing screws) and has standard
screw-terminals for connecting wiring. The MTL831C-PS sensor ports use pluggable
connectors without securing screws. Cables for pluggable connectors without
securing screws are to be secured and supported
Type
Pluggable screw terminals
Fixed screw terminals
A torque screwdriver set between 0.5 - 0.6Nm is recommended for tightening all
5 .3
Sensor inputs
Sensors connected to the MTL831C/MTL831C-PS should not be earthed. This
avoids differences in earth potential that could affect measurement accuracy or
damage the MTL831C/MTL831C-PS. If sensors must be earthed they should be
located close to each other to avoid differences in earth potential.
5 .4
RTD inputs
The 16 channels can be configured for 2, 3 or 4 wire mode as shown in the
connection diagram on the unit overlay. Software configuration is also required to
select the proper measuring method. This is done via PC Software or Modbus. By
default the MTL831C/MTL831C-PS is configured for mV inputs.
5 .5
THCs and mV inputs
Connect up to 16 THC or mV inputs directly to the input terminals as shown on the
overlay connection diagram making sure the polarity is correct.
Conductor size
0.14 to 2.5mm
0.14 to 1.4mm
NOTE
terminal screws.
MTL831C
Analog Transmitter
mtl-inst.com
Screw Terminal
POWER
ERROR
TC & mV
A
B
C
D
RTD
Remove
1
Push
2
Install
R
2
2
INM MTL831C Rev 7
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