(96.5)
MODEL PAXLIT - PAX® LITE 5 AMP AC CURRENT METER
5 AMP AC CURRENT INPUT*
3 1/2-DIGIT, 0.56" (14.2 mm) HIGH LED RED DISPLAY
SELECTABLE DECIMAL POINT LOCATION
BUILT-IN SCALING PROVISIONS
OVER-RANGE INDICATION
NEMA 4X/IP65 SEALED FRONT BEZEL
OPTIONAL CUSTOM UNITS OVERLAY W/BACKLIGHT
Accessory Shunts Available For Higher Current Ranges.
*
U
R
C
US LISTED
L
IND. CONT. EQ.
51EB
GENERAL DESCRIPTION
PAXLIT 5 Amp AC Current Meter provides the capability of measuring large
AC currents. The internal current shunt in the PAXLIT can measure up to 5
Amps AC current directly. Using an external current transformer, AC currents
of up to 1,999 Amps can be measured and displayed.
The PAXLIT can be scaled, using the scaling potentiometer, to display
between 200 and 1999 when measuring full scale current. Using the DIP switch
selectable decimal points, the display can be customized for direct readout for
practically any application.
The 3½-digit bi-polar display (minus sign displayed when current is
negative) features a 0.56" high, 7-segment LEDs for easy reading. The meter is
also available with custom units label capability. Using the PAX label kit
(PAXLBK30), the selected label is installed behind the panel, keeping it safe
from washdown or other environmental conditions. A DIP switch is used to
control the backlight for the units label.
The meters have a NEMA 4X/IP65 sealed bezel and extensive testing of
noise effects to CE requirements, allowing the meter to provide a tough yet
reliable application solution.
CAUTION: Read complete
instructions prior to installation
and operation of the unit.
DIMENSIONS In inches (mm)
CAUTION: Risk of electric shock.
Note: Recommended minimum clearance (behind the panel) for mounting clip installation is
2.1" (53.4) H x 5.0" (127) W.
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in the
literature or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
DEFINITION OF TERMS
INSTALLATION CATEGORY (overvoltage category) I, (CAT I):
Signal level, special equipment or parts of equipment, telecommunication,
electronic, etc. with smaller transient overvoltages than Installation
Category (overvoltage category) II. (See IEC 664 & IEC 61010)
INSTALLATION CATEGORY (overvoltage category) II, (CAT II):
Local level, appliances, portable equipment, etc. with smaller transient
overvoltages than Installation Category (overvoltage category) III. (See
IEC 664 & IEC 61010)
1.8.8.8.
3.80
A
1.95
(49.5)
.10
(2.5)
4.10
(104.1)
1
1.75
(44.5)
1
2
5
6
3
4
3.60 (91.4)
1.75
7
8
11
9
10
(44.5)
Table Of COnTenTs
Ordering Information ....................2
General Meter Specifications .............3
Accessories ...........................3
Installing the Meter .....................4
Setting the Switches ....................4
Ordering infOrmaTiOn
Meter Part Numbers
PAXL
IT
Wiring the Meter .......................5
Scaling the Meter ......................5
Application ............................6
Troubleshooting ........................6
Calibration ............................6
0
0
Accessories Part Numbers
TYPE PART NUMBERSDESCRIPTIONMODEL NO.
Units Label Kit Accessory
50:5 Amp Current Transformer
200:5 Amp Current Transformer
Accessories
Accessories
PAXLBK
CT
IT - 5 Amp Current Meter
PAXLBK30
CT005050
CT020050
2
general meTer speCifiCaTiOns
1. DISPLAY: 3 1/2-digit, 0.56" (14.2 mm) high, 7-segment red LED. Decimal
points inserted before 1st, 2nd, or 3rd least significant digits by DIP switch
selection.
2. POWER: 115/230 VAC, switch selectable. Allowable power line variation
±10%, 50/60 Hz, 6 VA.
Isolation: 2300 Vrms for 1 min. between input and supply
Working Voltage: 300 V max., CAT II
3. SIGNAL INPUT:
Range: 0 to 5 Amps AC @ 45 to 400 Hz
Resolution: 2.5 mA
Working Voltage: 300 V max., CAT II
4. ACCURACY: ±(0.5% of reading + 5 digits).
5. OVER-RANGE INDICATION: is indicated by blanking 3 least significant
digits.
6. MAX SHUNT CURRENT: 50 Amps for 1 sec.; 8 Amps continuous.
Caution: In circuits where fault currents can exceed the maximum shunt
current, a fast-blow fuse should be installed in series with the input signal.
Otherwise, a slow blow 8 Amp fuse is recommended that will allow for
start-up over current situations, while still protecting the instrument.
7. ENVIRONMENTAL CONDITIONS:
Operating Temperature: 0° to 60 °C
Storage Temperature: -40° to 80 °C
Operating and Storage Humidity: 85% max. relative humidity (non-
condensing)
Vibration to IEC 68-2-6: Operational 5 to 150 Hz, 2 g.
Shock to IEC 68-2-27: Operational 30 g
Altitude: Up to 2000 meters
8. RESPONSE TIME TO STEP CHANGE INPUT: 1 sec. nominal
9. READING RATE: 2.5 readings/sec., nominal
10. CERTIFICATIONS AND COMPLIANCES:
CE Approved
EN 61326-1 Immunity to Industrial Locations
Emission CISPR 11 Class B
Safety requirements for electrical equipment for measurement, control, and
laboratory use:
EN 61010-1: General Requirements
EN 61010-2-030: Particular Requirements for Testing and Measuring
Circuits
RoHS Compliant
UL Listed: File #E137808
Type 4X Outdoor Enclosure rating (Face only)
IP65 Enclosure rating (Face only)
IP20 Enclosure rating (Rear of unit)
11. CONNECTIONS: High compression cage-clamp terminal block
Wire Strip Length: 0.3" (7.5 mm)
Wire Gage: 30-14 AWG copper wire
Torque: 4.5 inch-lbs (0.51 N-m) max.
12. CONSTRUCTION: This unit is rated for Type 4X/IP65 outdoor use.
Installation Category II, Pollution Degree 2. One piece bezel/case. Flame
resistant. Panel gasket and mounting clip included.
13. WEIGHT: 0.65 lbs. (0.24 Kg)
aCCessOries
UNITS LABEL KIT (PAXLBK)
Each meter has a units indicator with backlighting that can be customized
using the Units Label Kit. The backlight is controlled by a DIP switch.
3
1.0 insTalling The meTer
Installation
The PAX 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.
PANEL
BEZEL
PANEL
GASKET
LATCHING
SLOTS
PANEL
MOUNTING
SCREWS
PANEL
LATCH
LATCHING
TABS
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.
PANEL CUT-OUT
+.03
3.62
-.00
+.8
(92 )
-.0
+.02
1.77
-.00
+.5
(45 )
-.0
2.0 seTTing The swiTChes
The meter has switches, which must be checked and/or changed prior to
applying power. To access the switch, 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 the other side latch.
Power Selection Switch
Caution: Insure the AC power selection switch is set for the
proper voltage before powering the meter. The meter is shipped
from the factory in the 230 VAC position.
Set-Up DIP Switches
A DIP switch is located inside the meter. It is used for the selection of decimal
points, backlight annunciator, and scaling. Selecting the “ON” position enables
the function.
FUNCTIONSWITCH
Decimal Point 1 (000.0)1
Decimal Point 2 (00.00)2
Decimal Point 3 (0.000)3
Backlight Annunciator for Units Label4
Enables the Scaling Pot *5
* Turn scaling pot fully clockwise (25 turns max.) when scaling is disabled.
Factory setting is the fully clockwise position.
FRONT DISPLAY
Main
Circuit
Board
115
230
REAR TERMINALS
POWER SELECTION
SWITCH
SCALING
POT
SET-UP
DIP
SWITCHES
ON
4
2
5
1
3
4
3.0 wiring The meTer
115/230
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 power supplied
to the meter (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.
a. Connect the shield to earth ground (protective earth) at one end where the
unit is mounted.
b. Connect the shield to earth ground at both ends of the cable, usually when
the noise source frequency is over 1 MHz.
3. Never run Signal or Control cables in the same conduit or raceway with AC
power lines, conductors, feeding motors, solenoids, SCR controls, and
heaters, etc. The cables should be run through metal conduit that is properly
grounded. This is especially useful in applications where cable runs are long
and portable two-way radios are used in close proximity or if the installation
is near a commercial radio transmitter. Also, Signal or Control cables within
an enclosure should be routed as far away as possible from contactors,
control relays, transformers, and other noisy components.
4. Long cable runs are more susceptible to EMI pickup than short cable runs.
5. In extremely high EMI environments, the use of external EMI suppression
devices such as Ferrite Suppression Cores for signal and control cables is
effective. The following EMI suppression devices (or equivalent) are
recommended:
Fair-Rite part number 0443167251 (RLC part number FCOR0000)
Line Filters for input power cables:
Schaffner # FN2010-1/07 (Red Lion Controls # LFIL0000)
6. To protect relay contacts that control inductive loads and to minimize radiated
and conducted noise (EMI), some type of contact protection network is
normally installed across the load, the contacts or both. The most effective
location is across the load.
a. Using a snubber, which is a resistor-capacitor (RC) network or metal oxide
varistor (MOV) across an AC inductive load is very effective at reducing
EMI and increasing relay contact life.
b. If a DC inductive load (such as a DC relay coil) is controlled by a transistor
switch, care must be taken not to exceed the breakdown voltage of the
transistor when the load is switched. One of the most effective ways is to
place a diode across the inductive load. Most RLC products with solid
state outputs have internal zener diode protection. However external diode
protection at the load is always a good design practice to limit EMI.
Although the use of a snubber or varistor could be used.
RLC part numbers: Snubber: SNUB0000
Varistor: ILS11500 or ILS23000
7. Care should be taken when connecting input and output devices to the
instrument. When a separate input and output common is provided, they
should not be mixed. Therefore a sensor common should NOT be connected
to an output common. This would cause EMI on the sensitive input common,
which could affect the instrument’s operation.
Visit RLC’s web site at http://www.redlion.net/emi for more information on
EMI guidelines, Safety and CE issues as they relate to Red Lion Controls
products.
3.1 POWER WIRING
AC Power
Terminal 1: VAC
Terminal 2: VAC
AC
1 2
AC
3.2 INPUT SIGNAL WIRING
Current Signal (self powered)
Terminal 4: + Amps AC
Terminal 3: - Amps AC
4.0 sCaling The meTer
FACTORY SCALING
The meter is calibrated from the factory for 5 Amps AC current input to show
1999. This scaling will be used when the Scale Switch is in the “OFF” position.
COMM
SIGNAL
3 4
-
5A MAX.
+
A
SCALING READOUT
Place the Scale Switch in the “ON” position. This enables the Scale
Potentiometer which is accessible from the back of the meter. (Enabling the
Scale Potentiometer does NOT affect the calibration of the meter.) Place the
Decimal Point Switches to the proper location. Apply the meter power and the
current signal. Adjust the Scale Potentiometer to the desired value.
This scaling only effects the span. There is no offset scaling. This means that
only zero current can display a value of zero.
At 5 Amps AC current input, the display can be scaled from 1999 down to
200 by using the scaling potentiometer. For display values below 200, turn on
the appropriate Decimal Point Switch and then adjust the potentiometer to
achieve the desired display value. Example: A customer wants to display 50
Amps because he is using a 50:5 CT. In this case, he must turn DIP switch 1 on
for a decimal point and DIP switch 5 on for scaling. Then apply the 5 Amp
signal and turn the scaling pot until 50.0 is shown on the display.
5
5.0 appliCaTiOn
MOTOR CURRENT MEASUREMENT USING A
CURRENT TRANSFORMER
The PAXLIT 5 Amp AC Current Meter is configured by simply connecting
the “COMM.” (Terminal 3) and the “5AMP” (Terminal 4) to the external
current transformer. The current carrying wire to be sensed is passed through the
center of the current transformer. The resolution of the display, in this case, is
0.1 Amp, therefore, “Switch #1” is selected.
The meter is now ready to be scaled. The installer has access to a calibrated
portable digital current meter capable of measuring the motor current. Scaling
will be accomplished by adjusting the scaling pot on the PAXLIT meter to agree
with the portable digital current meter. The operator turns on the AC motor and
lifts a large weight to load the motor. The installer then simply adjusts the
scaling adjustment, located at the rear of the unit, until the display is equal to
the value indicated on the portable current meter. The meter will now indicate
the load current of the motor precisely.
CAUTION: It is recommended that the current transformer be
internally protected or that a voltage clamping circuit be provided,
preventing dangerous high voltage across the CT secondary
windings in case of accidental opening of the secondary output
leads when the primary is energized.
In order to prevent risk of electric shock ensure CT is installed
according to local NEC regulations for installation of current
instrument transformers.
115V/230V
1
2
5
3
4
6
7
8
9
10
CURRENT TRANSFORMER
200 AMP/5 AMP RATIO
SCALE
ADJUST
AC
CRANE
MOTOR
6.0 TrOubleshOOTing
PROBLEM REMEDIES
NO DISPLAY CHECK: Power switch and line voltage
INCORRECT DISPLAY
OVER-RANGE INDICATION VERIFY: Input signal
CHECK: Scaling adjustment pot DIP switch position
ADJUST: Scaling pot
VERIFY: Input Signal
For further assistance, contact technical support at the appropriate company numbers listed.
7.0 CalibraTiOn
The meter has been fully calibrated at the factory. Scaling to convert the input
signal to a desired display value is performed by enabling the scale pot
DIP switch. If the meter appears to be indicating incorrectly or inaccurately,
refer to Troubleshooting before attempting to calibrate the meter.
When recalibration is required (generally every two years), it should only be
performed by qualified technicians using appropriate equipment.
Input Calibration
Before starting, verfiy that the precision signal source is connected and ready.
Allow a 30 minute warm-up period before calibrating the meter.
Then perform the following procedure:
1. Set the DIP switch off to disable the scaling pot.
2. Apply half scale input signal (2.5 A @ 60 Hz).
3. Adjust calibration potentiometer as necessary for the display to read 1000
(ignore decimal point)
4. Apply zero signal and ensure display reads zero.
5. Apply full scale signal (5 A @ 60 Hz) and ensure display reads 1999.
WARNING: Calibration of this meter requires a signal source
with an accuracy of 0.05% or better and an external meter with
an accuracy of 0.005% or better.
6
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