Instruction manual

Output Wiring
continued
RFT9739 Rack-Mount Transmitter Instruction Manual 31
Output Wiring Startup TroubleshootingBefore You Begin Getting Started Mounting
Power-Supply and
Sensor Wiring
Default configuration
When the RFT9739 is shipped from the factory, the frequency/pulse
output is internally powered by an isolated 15-volt source via a 2.2 kohm
pull-up resistor. This internal current is limited to approximately 7 mA.
See
Figure 5-5
.
Figure 5-5.
Frequency/pulse output
wiring
Configuration for
increased current
In some applications, it might be necessary to increase the current in the
frequency/pulse output circuit. See
Section 5.2
, page 25. For increased
current to the circuit, add a 1 to 3 kohm resistor across terminals
CN2-Z26 and CN2-D24, as illustrated in
Figure 5-6
.
Figure 5-6.
Frequency/pulse output
wiring for increased
current
PLC
or
pulse counter
FREQ+ (signal line)
RETURN (ground)
RFT9739
output terminals
PLC
or
pulse counter
1 to 3 kohm
resistor
FREQ+ (signal line)
RETURN (ground)
RFT9739
output terminals