iTEMP TMT112 Electrical connection
Endress+Hauser 13
5.1 Quick wiring guide
RTD W
RTD W
RTD WTC
2-wire 3-wire 4-wire
12 to 35 V
12 to 30 V Ex
4 to 20 mA
HART Signal
®
OUT
GND -
5
6
1
2
3
4
6
5
1 1
1
2
4
2
1 1
1 1
3
3
3 3
2
2
2 2
4
4
A0040217
2 DIN rail transmitter wiring
5.2 Connecting the sensor cables
Connect the sensor cables to the respective DIN rail transmitter terminals (Terminals 1 to 4)
by following the wiring diagram → 2, 13. Wiring plugs are removable for easy access.
5.3 Connecting the output signal and power supply
Connect the cable wires from the power supply to terminal 5 and 6 according to the wiring
diagram → 2, 13. For convenient installation, the connection is designed as a removable
plug, so the connection can be made on the terminals, then plug in the connection socket to
the transmitter housing.
The screws on the terminals must be screwed in tightly.
5.4
HART
®
connecting
Connection is made directly using the 4 to 20 mA signal cables or the communication sockets
fitted to a power supply or barrier. In order to connect the transmitter in a hazardous area,
please read the separate Ex documentation.
The measurement circuit must have a load of at least 250 Ω (see → 3, 14 and
→ 4, 14).
Connection of a HART® communicator Model 375
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