11

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 (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.) Each terminal can accept up to one #14 AWG (2.55 mm) wire, two

#18 AWG (1.02 mm), or four #20 AWG (0.61 mm).

EMC INSTALLATION GUIDELINES

Although this meter is designed with a high degree of immunity to Electro-

Magnetic Interference (EMI), proper installation and wiring methods must be

followed to ensure compatibility in each application. The type of the electrical

noise, its source or the method of coupling into the unit may be different for

various installations.Listed below are some EMC guidelines for successful

installation in an industrial environment.

1. The meter should be mounted in a metal enclosure, which is properly

connected to protective earth.

2. With use of the lower input ranges or signal sources with high source

impedance, the use of shielded cable may be necessary. This helps to guard

against stray AC pick-up. Attach the shield to the input common of the meter.

Line voltage monitoring and 5A CT applications do not usually require

shielding.

3. To minimize potential noise problems, power the meter from the same power

branch, or at least the same phase voltage as that of the signal source.

4. 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 in 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.

5. Signal or Control cables within an enclosure should be routed as far away as

possible from contactors, control relays, transformers, and other noisy

components.

6. In extremely high EMI environments, the use of external EMI suppression

devices, such as ferrite suppression cores, is effective. Install them on Signal

and Control cables as close to the unit as possible. Loop the cable through the

core several times or use multiple cores on each cable for additional

protection. Install line filters on the power input cable to the unit to suppress

power line interference. Install them near the power entry point of the

enclosure. The following EMI suppression devices (or equivalent) are

recommended:

Ferrite Suppression Cores for signal and control cables:

Fair-Rite # 0443167251 (RLC #FCOR0000)

TDK # ZCAT3035-1330A

Steward #28B2029-0A0

Line Filters for input power cables:

Schaffner # FN610-1/07 (RLC #LFIL0000)

Schaffner # FN670-1.8/07

Corcom #1VR3

Note: Reference manufacturer’s instructions when installing a line filter.

7. Long cable runs are more susceptible to EMI pickup than short cable runs.

Therefore, keep cable runs as short as possible.

8. Switching of inductive loads produces high EMI. Use of snubbers across

inductive loads suppresses EMI.

Snubber: RLC#SNUB0000.

4.0 Wiring THe meTer

4.1 POWER WIRING

1

2

AC Power

Terminal 1: VAC

Terminal 2: VAC

1

2

+

-

DC Power

Terminal 1: +VDC

Terminal 2: -VDC

Current Signal

(self powered)

Terminal 4: +ADC

Terminal 5: -ADC

Voltage Signal

(self powered)

Terminal 3: +VDC

Terminal 5: -VDC

Current Signal (2 wire

requiring excitation)

Terminal 4: -ADC

Terminal 6: +ADC

Excitation Jumper: 24 V

3

4

5

+

-

300VDC MAX.

Before connecting signal wires, the Input Range Jumper and Excitation Jumper should be verified for proper position.

4.2 INPUT SIGNAL WIRING

Current Signal (3 wire

requiring excitation)

Terminal 4: +ADC (signal)

Terminal 5: -ADC (common)

Terminal 6: +Volt supply

Excitation Jumper: 24 V

Voltage Signal (3 wire

requiring excitation)

Terminal 3: +VDC (signal)

Terminal 5: -VDC (common)

Terminal 6: +Volt supply

Excitation Jumper: 24 V

4

5

2A DC MAX.

Load

-

+

3

4

5

6

+Vs

3 WIRE TRANSMITTER

COMM.

Iout

Vout

4

5

6

2 WIRE

TRANSMITTER

-

+

+24V

PAXD INPUT SIGNAL WIRING