Red Lion PAXLT - Manual (Page 3)

3
3.0 W
iring the
M
eter
WIRING OVERVIEW
Electrical connections are made via screw-clamp terminals located on the
back of the meter. All conductors should conform to the meter’s voltage and
current ratings. All cabling should conform to appropriate standards of good
installation, local codes and regulations. It is recommended that the power
supplied to the meter (DC or AC) be protected by a fuse or circuit breaker.
When wiring the meter, compare the numbers embossed on the back of the
meter case against those shown in wiring drawings for proper wire position. Strip
the wire, leaving approximately 0.3" (7.5 mm) bare lead exposed (stranded wires
should be tinned with solder.) Insert the lead under the correct screw-clamp
terminal and tighten until the wire is secure. (Pull wire to verify tightness.)
EMC INSTALLATION GUIDELINES
Although Red Lion Controls Products are designed with a high degree of
immunity to Electromagnetic Interference (EMI), proper installation and wiring
methods must be followed to ensure compatibility in each application. The type
of the electrical noise, source or coupling method into a unit may be different
for various installations. Cable length, routing, and shield termination are very
important and can mean the difference between a successful or troublesome
installation. Listed are some EMI guidelines for a successful installation in an
industrial environment.
1. A unit should be mounted in a metal enclosure, which is properly connected
to protective earth.
2. Use shielded cables for all Signal and Control inputs. The shield connection
should be made as short as possible. The connection point for the shield
depends somewhat upon the application. Listed below are the recommended
methods of connecting the shield, in order of their effectiveness.
1.0 i
nstalling the
M
eter
2.0 s
etting the
J
uMper
INPUT RANGE JUMPER (RTD ONLY)
This jumper is used to select the proper input range for the RTD probe being
used (10 ohm or 100 ohm). For thermocouple inputs, this jumper has no effect
and can be left in either position.
To access the jumper, remove the meter base from the case by firmly
squeezing and pulling back on the side rear finger tabs. This should lower the
latch below the case slot (which is located just in front of the finger tabs). It is
recommended to release the latch on one side, then start on the other side latch.
Main
Circuit
Board
REAR TERMINALS
FRONT DISPLAY
RTD RANGE
JUMPER
10 OHM 100 OHM
Installation
The PAX Lite meets NEMA 4X/IP65 requirements when properly installed.
The unit is intended to be mounted into an enclosed panel. Prepare the panel
cutout to the dimensions shown. Remove the panel latch from the unit. Slide the
panel gasket over the rear of the unit to the back of the bezel. The unit should
be installed fully assembled. Insert the unit into the panel cutout.
While holding the unit in place, push the panel latch over the rear of the unit
so that the tabs of the panel latch engage in
the slots on the case. The panel latch
should be engaged in the farthest
forward slot possible. To
achieve a proper seal,
tighten the latch
screws evenly
until the unit is snug in the panel (Torque to approximately 7 in-lbs [79N-cm]).
Do not over-tighten the screws.
Installation Environment
The unit should be installed in a location that does not exceed the maximum
operating temperature and provides good air circulation. Placing the unit near
devices that generate excessive heat should be avoided.
The bezel should be cleaned only with a soft cloth and neutral soap product.
Do NOT use solvents. Continuous exposure to direct sunlight may accelerate the
aging process of the bezel.
Do not use tools of any kind (screwdrivers, pens, pencils, etc.) to operate the
keypad of the unit.
PANEL
GASKET
BEZEL
PANEL
MOUNTING
SCREWS
LATCHING
SLOTS
PANEL
LATCHING
TABS
PANEL
LATCH
-.00
(92 )
-.0
+.8
3.62 +.03
(45 )
1.77
-.0
+.5
-.00
+.02
PANEL CUT-OUT