Ultraflux Uf 841, User Manual

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NT UF 841 CP GB (d) / June 2015
5) Wiring of the temperature modules
Note: this is a double location module
The sensors Pt 100 and Pt 1000 can be wired in different ways:
The most complete wiring is that using a 4-wire sensor:
Pin Function
1 red wire 1
2 white wire 1
3 red wire 2
4 white wire 2
Please note : To ensure good measurement quality, it is recommended to use shielded platinum probes.
The shield connection is ensured by the ground connection jumper provided on the internal panelling.
3.6.4 Communication terminal board
A common terminal board is provided for connecting the RS232 or RS485
communication. Only one type of communication must be used at a time.
With regard to the RS485 network, this must end in a load resistor at each
end of the line, especially if the cable is long. This resistance is planned for
on the electronic card; simply add a jumper between points 5 and 6 to
connect it.
1) RS232 mode wiring 2) RS485 mode wiring
Pin Function
1 GND
2 Rx UF 841
3 Tx UF 841
4, 5, 6, 7 not used
Pin Function
1, 2, 3 not used
4 A+ RS485 (=Z)
Jumper between 5 and 6 To use the load resistance
7 B - RS485 (=Y)
Type of cable to be used: same recommendations as for the inputs/outputs.
To connect the shielding, it is recommended that the same precautions are followed as for the
inputs/outputs and the ultrasonic chords (copper tape). Use shield connection jumpers designed for this
purpose.
Please note: for 2- or 3-wire cables, just use
"bridging" to make up for the missing wires. In the 3-
wire version, a white wire is missing: simply bridge
the two white wires 1 and 2 and place the white cable
on the "white wire" pin.
1 x 2 wires - Cable
1 x 3 wires - Cable
1 x 4 wires - Cable