Wiring Instructions
To wire the F-5500, unscrew and remove the enclosure cap and loosen the two captive
screws on the display assembly. Rotate it open to access the wiring terminals. Refer to
"Fig. 2.13 - Accessing Wiring Terminals or Rotating the Display" on page 28 for location
of screws.
Connect the power and signal wires to the terminal blocks according to the label and
instructions on the following pages.
Cut all wires as short as allowable for a minimum service loop.
Obtain the correct length
for the F-5500 wires using one of these methods:
• Trim the wires to extend 2 inches out of the enclosure after the conduit and wires
are routed to the F-5500.
• Trim the wires to extend 5 inches from the end of the conduit before attaching
them to the F-5500.
Wiring Precautions - WARNING!
• Do not open the enclosure when energized or an explosive atmosphere is present.
• Connect earth ground to a chassis ground screw on the inside or outside of F-5500
enclosure to reduce the potential of an electrostatic charging hazard.
• All plumbing and electrical installations of flow meters must be in compliance
with local codes, the end user’s best engineering practices, and manufacturer’s
recommendations.
• Do not install the F-5500 enclosure near an igniter, igniter-controller or switching
equipment to eliminate the possibility of noise interference.
• Do not install an external power supply in a cabinet containing an igniter controller or
switching equipment.
• This flow meter contains components that can be damaged by static electricity. You
must discharge yourself by touching a grounded steel pipe or other grounded metal
prior to working inside this flow meter.
• Close any unused conduit entries using suitably certified plugs
Power Wiring
For wiring the 12 to 28VDC power, use stranded copper wire, no larger than 16-gauge.
Twisted pair shielded cable is recommended. Supply connection wiring must be rated for
at least 90°C.
Grounding
The enclosure must be properly grounded with a quality earth ground. 16 gauge, stranded
wire is recommended.
Signal Wiring
For signal and serial communication wiring, the recommended wire gauge is 18 to 22
AWG. Always use twisted pair shielded cable.
11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax +1 (727) 442-5699 • sales@onicon.com
F-5500 Thermal Mass Flow Meter Manual 06/17 - 2030 / 107023 Page 29
Model F-5500
WIRING
Wiring: General
Scope
Precautions
Power Wiring
Grounding
Signal Wiring
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