ONICON F-2600 - Manual (Page 41)

11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax (727) 442-5699 • [email protected]
F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 41
2.7 HIGH POWER 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 AC power connections must be in accordance with published CE directives.
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 3/4" 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.
4-20
mA 3
AC
PWR
IN
4-20
mA 1
24
VDC
OUT
+ - +
4-20
mA 2
- + - +
RS
485
RS
485
RS
485
G
ND
-
OPTION 2
+
ALARM
2
HO
T
PULSE
OUT
NE
UT
FREQ
OUT
+ - +
ALARM
1
- + -
4
OPTION 1
1 2 3 1 5 2 3
ALARM
3
- + -
4 5
+ -
Figure 26. AC Wiring Terminals
2.7.1 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.
!
CAUTION
The AC wire insulation temperature rating must meet or exceed 85°C (185°F).
AC Power Wiring
The AC power wire size must be 20 to 10 AWG with the wire stripped 1/4 inch (7 mm).
The wire insulation temperature must meet or exceed 185°F (85°C). Connect 100 to 240
VAC (5 W maximum) to the Hot and Neutral terminals on the terminal block. Connect the
ground wire to the safety ground lug ( ). Torque all connections to 4.43 to 5.31 in-lbs
(0.5 to 0.6 Nm). Use a separate conduit entry for signal lines to reduce the possibility of
AC noise interference.