Instruction manual

52 RFT9739 Rack-Mount Transmitter Instruction Manual
Output Wiring
continued
If the pressure transmitter requires a power supply less than or
equal to 11.75 V,
the RFT9739 can power the pressure transmitter. Use
RFT9739 terminals CN2-Z6 and CN2-Z20. Terminal Z6 (P) is the power
output to the pressure transmitter, and terminal Z20 (S) is the signal
input to the RFT9739, as shown in
Figure 5-27a
.
If the pressure transmitter requires a power supply greater than
11.75 V,
or if other loop devices are required, an external source can
power the pressure transmitter. Use RFT9739 terminals CN2-Z20 and
CN2-D14 or CN2-Z14. Terminal Z20 (S) is the signal input to the
RFT9739, and terminal D14 or Z14 (SIGNAL GND) is the return, as
shown in
Figure 5-27b
, page 53.
If digital communication between the pressure transmitter and the
RFT9739 is required,
use primary variable terminals CN2-Z30 (PV+)
and CN2-D30 (PV–), as shown in
Figure 5-27c
, page 53.
Figure 5-27a. Wiring to pressure transmitter — analog output
Pressure
transmitter
WARNING: Pressure transmitter wiring is
not intrinsically safe
RFT9739
output terminals