Wire; T24-Acm-Ta; Power; Sensor - Mantracourt T24-ACMi-SA User Manual

4 Wire

The four-wire resistance thermometer configuration increases the accuracy and reliability of the resistance being
measured: the resistance error due to lead wire resistance is zero. In the diagram above a standard two-terminal
RTD is used with another pair of wires to form an additional loop that cancels out the lead resistance. It provides
full cancellation of spurious effects; cable resistance of up to 15 ohms can be handled.

T24-ACM-TA

Power

Power can be supplied by fitting two D cell alkaline 1.5 V batteries or the module can be supplied from an
external 5 Vdc to 18 Vdc source.
In both cases you need to fit the JP1 power jumper to supply power to the transmitter module.
When powered from the external DC source the LED will illuminate.
For battery information please refer to

Sensor

The temperature sensor input is connected to the module via a 2 part screw terminal block.
Screw Terminal Function
1 +Drive
2 +Sense
3 -Sense
4 -Drive
5 Shield
A
B
Mantracourt Electronics Limited
SHLD
D-
S-
S+
D+
Pow er Jumper JP1
1
2
3
4
5
A
B
0V
+Supply
LED
Appendix D – Battery Selection
2 X D Cell Batteries
103
T24 Telemetry User Manual