Prothermo NMT81 Electrical connection
Endress+Hauser 43
6.7 Wiring connection for converter-only version
Procedure for connecting temperature signal cable
A temperature signal cable is connected to the NMT81 input cable with the provided
terminal connector.
The temperature elements are divided into four connectors according to the element
numbers (see the following figure).
A0044594
39 Terminal connectors for temperature elements
1 Element 1 to 6 + Common wire
2 Element 7 to 12 + Common wire
3 Element 13 to 18 + Common wire
4 Element 19 to 24 + Common wire
For each element, there are three colored wires (blue, red and white) and the common
wires (black) for element No.s 1, 7, 13 and 19 are also bundled together.
No. Color Wire size Description
1 Red AWG30 Current source
2 Blue AWG30 Voltage sens positive
3 White AWG30 Voltage sens negative
4 Black AWG30 Common return
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