(-) (+)
(-) (+) (-) (+)
Power
12-28VDC
4-20mA Pulse
/Alarm
!
+12 to 28VDC
Pulse or Alarm
Output
12 to 28VDC Return
+
-
F-5500
Customer PLC or DCS
2.4K Ohm typical with 24VDC Power
1.2K Ohm typical with 12VDC Power
i
Pulse/Alarm Output Wiring: Customer Supplied Power Source (Recommended)
Bring pulse/alarm wiring in through either conduit hub. Connect as shown in the
diagram below. The pulse/alarm output is an open collector circuit capable of sinking
a maximum of 10mA of current. Pulse or alarm selection is programmed using the
display or F-5000 View. Only one option, pulse or alarm, can be active at a time. The
pulse output is normally low (open collector output closed) and pulses high +12
to 24VDC (open collector output open) for 500 milliseconds when the total flow is
measured. The maximum frequency setting of the pulse output is 1 Hz.
When the output is configured for Alarm, the open collector output will be open when
there is no alarm and closed when an alarm is present.
Fig. 3.4: Pulse/Alarm Output Isolated (Recommended)
IMPORTANT NOTES:
• The F-5500 Pulse/Alarm output is typically used to drive digital circuitry or solid-state relays.
The output of a solid state relay may, in turn, operate loads such as electromechanical relays
or alarm indicators.
• The maximum load current of the Pulse/Alarm output is 10mA. Choose a load resistance
that provides approximately 10mA with the power supply operating voltage.
• When the output is configured for Alarm and an alarm is not active, the output will be closed
(0 volts output). When an alarm is active, the output will be open (12 to 28 volts output).
• In order to use the Pulse/Alarm feature on the Model F-5500, this feature must be chosen
when the meter is ordered from the factory. Pulse output not available with meters ordered
with RS485 Modbus RTU and BACnet MS/TP.
11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax +1 (727) 442-5699 • [email protected]
F-5500 Thermal Mass Flow Meter Manual 06/17 - 2030 / 107023
Page 33
Model F-5500
WIRING
Model F-5500
WIRING
Wiring: Pulse/Alarm Wiring
Pulse/Alarm
Output Wiring:
