6
The Interface Solution Experts
TRZ
Figure 2. Using a PC to configure the TRZ.
–
+
TRZ
+PS –PS
TEST
TEST
+ –
3
+
+
–
–
+
–
12-28Vdc
POWER
TRZ
LOAD=250 OHMS
THE PC CAN BE
CONNECTED AT
ANY POINT ON THE
OUTPUT SIDE OF
THE LOOP.
TOTAL LOOP
RESISTANCE MUST BE
BETWEEN 250 AND
1100 OHMS FOR GOOD
HART COMMUNICATIONS
TO OCCUR.
2-WIRE RTD
OR DECADE
RESISTANCE BOX
OPTIONAL
CURRENT
METER
+ –
3
THERMOCOUPLE
SIMULATOR
3-WIRE RTD
OR DECADE
RESISTANCE BOX
+ –
3
+ –
3
MILLIVOLT
INPUT
4-WIRE RTD
OR DECADE
RESISTANCE BOX
+ –
3
2-WIRE
POTENTIOMETER
INPUT
+ –
3
3-WIRE
POTENTIOMETER
INPUT
+ –
3
4-WIRE
POTENTIOMETER
INPUT
+ –
3
HART MODEM
CONNECTS TO SERIAL
(COM) PORT
OF PC
Summary of Contents for TRZ
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