14
The Interface Solution Experts
THZ
2
&
TDZ
2
Programmable Smart HART
Temperature Transmitter and Display
1
2
3
4
+PS –PS
THZ
COM
2
PC
To serial
(COM) port
of PC
Input Hook-Up Connections
+
–
1
4
3
2
1
4
3
2
1
4
3
2
Thermocouple
and Millivolt
Input
2-Wire RTD
or Decade
Resistance Box
1
4
3
2
3-Wire RTD
or Decade
Resistance Box
4-Wire RTD
or Decade
Resistance Box
1
4
3
2
Potentiometer
Input
+
–
12-24Vdc
Power
Supply
THE HART Communicator
or the PC can be connected
at any point on the output
side of the loop. Total loop
resistance must equal between
250 and 1100 ohms for proper
HARTcommunications.
Current Meter
Load = 250 ohms
OR
HART Modem
connects to
serial (COM)
port of PC
–
+
NOTE:
1. Terminal blocks can accommodate 14-22 AWG (2.0-0.3mm ) solid wiring.
2. DIN Housing terminals on TPRG input instruments utilize #6 screws. Tighten terminals to 7.9 in lb (0.89Nm) (maximum).
2
To USB
(COM)
Port of PC
OR
Figure 8.
THZ
2
DIN Hook-Up Diagram
