ONICON F-2600 - Manual (Page 35)

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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 35
2.6 LOOP-POWERED FLOW METER WIRING CONNECTIONS
!
WARNING
To avoid potential electric shock, follow National Electric Code safety practices or your local code
when wiring this unit to a power source and to peripheral devices. Failure to do so could result in
injury or death. All wiring procedures must be performed with the power off.
The NEMA 4X enclosure contains an integral wiring compartment with one dual strip terminal
block (located in the smaller end of the enclosure). Two ¾" female NPT conduit entries are
available for separate power and signal wiring. For all hazardous area installations, make sure
to use an agency-approved fitting at each conduit entry. If conduit seals are used, they must be
installed within 18" (457 mm) of the enclosure.
LOOP
POWER
+ -
FREQ
OUT
PULSE
OUT
- - + +
OPTIONAL
BACKLIGHT
POWER
+ -
Figure 16. Wiring Terminals for Loop-Powered Version
2.6.1 Input Power Connections
To access the wiring terminal blocks, locate and loosen the small set screw which locks
the small enclosure cover in place. Unscrew the cover to expose the terminal block.
DC Power Wiring
Connect 4-20 mA loop power (12 to 36 VDC at 25 mA, 1W max.) to the +Loop Power and
–Loop Power terminals on the terminal block. Torque all connections to 4.43 to 5.31 in-lbs
(0.5 to 0.6 Nm). The DC power wire size must be 20 to 10 AWG with the wire stripped ¼"
(7 mm).
Figure 17. DC Power Connections