➀

The ACA-20PC-1-AC1-RL and ACA-20PC-2-AC1-RL have 4-position on-board

terminal blocks. All other models have 2-position terminal blocks.

➁

Specified full-scale currents are those passing through the built-in CT's

primary(load) circuit, over the frequency of 45-450Hz. The Overcurrent Rating

is a continuous rating that applies to the measured ac load current. It does

not apply to any circuitry external to the meter. Accuracy is guaranteed to the

rated current.

➁

For the ACA-20PC-2-AC1-RL, if the load is connected to the meter's on-board

4-position terminal block, the 20A full scale range requires 12AWG solid

copper wire on all connections. If 14AWG solid copper wire is used, the current

should be limited to 15A. See Figure 3.

➃

All specified maximum power supply currents are steady-state values.

AC-powered models can draw higher surges at initial turn-on.

➄

Maximum reverse polarity protection on "DC1" models is –40Vdc.

Min.

Typ.

Max.

Units

ACA-20PC-1-XXX-XX

–

–

1.999

Amps

ACA-20PC-2-XXX-XX ➂

–

–

19.99

Amps

ACA-20PC-3-XXX-XX

–

–

50.0

Amps

ACA-20PC-4-XXX-XX

–

–

100.0

Amps

DMS-30798-C

–

–

30.0

Amps

Overcurrent Rating ➁

1.5 x rated full-scale current

Performance

Sampling Rate

2.5 reading per second

Accuracy ➁

±0.15%FS ±6 Counts

Measurement Type

Sine wave input, full-wave averaging, rms

calibrated

Temperature Drift (0 = +60°C)

–

±0.2

±0.4

Cnts/°C

Zero Reading (Vin = 0 Volts)

“–001”

“000”

“001”

Counts

Dielectric Withstanding Voltage

–

±0.4

±1

Vdc

Power Supply Voltage ➄

ACA-20PC-X-AC1-RL (47-99Hz)

85

120

264

Vac

ACA-20PC-X-DC1-RL

+4.75

–

+40

Vdc

Power Supply Current ➃

ACA-20PC-X-AC1-RL (47-99Hz)

–

30

50

mA

ACA-20PC-X-DC1-RL

–

+8

+12

mAdc

Power Supply Terminal Block

ACA-20PC-1-AC1-RL and ACA-20PC-2-AC1-RL

(2A and 20A ac-powered models with 4-position terminal blocks):

Wire Size and Type

12-20AWG (solid), 14-20AWG (stranded)

Insulation Strip Length

0.25 inches

Screw Tightening Torque

4.4 pounds/inches (0.5Nm)

Maximum Rated Current

20A with 12AWG solid wire; 15A with

14AWG solid or stranded wire

Maximum Rated Voltage

630V (VDE 0110-V. Group 2)

250V (VDE 0110-V Group 3)

ACA-20PC-X-XXX-XX

(All other ac or dc-powered models with 2-position terminal blocks):

Wire Size and Type

16-24AWG (solid or stranded)

Insulation Strip Length

0.25 inches

Screw Tightening Torque

3.6 pounds/inches (0.5Nm)

Display

Display Type and Size

3½ digit, 0.37"/9.4mm high LED

Overrange Indication

“1_ _ _“

Decimal Point

Fixed, model dependent

Physical/Environmental

Operating Temperature

0

–

+60

°C

Storage Temperature

–40

–

+75

°C

Humidity (non-condensing)

0

–

95

%

Physical/Environmental

Case Material

Polycarbonate

Dimensions

1.38”W x 0.88”H. Depth is model dependent

(see mechanical specification)

Weight:

ACA-20PC-1-XXX-XX

1.1 ounces (31 grams)

ACA-20PC-2-XXX-XX

1.1 ounces (31 grams)

ACA-20PC-3-XXX-XX

1.3 ounces (37 grams)

ACA-20PC-4-XXX-XX

1.5 ounces (43 grams)

DMS-30798-C

1.0 ounces (28 grams)

Performance/Functional Specifications

ACA - 20PC - 1 - AC1 - RL - L - C

1 = 1.999A

2 = 19.99A

3 = 50.0A

4 = 100.0A

RL = Red Standard

BL = Blue Standard

PGL = Green Standard

AC1 = 85-264Vac@50/60Hz

DC1 = +5-40Vdc

DMS-30798-C: 30Amp model with a wire lead CT and “-AC1”

power supply specifications. See Mechanical section for dimensions.

Accessories: DMS-20-CP Panel cutout punch

A DMS-BZL4-C bezel assembly with sealing gasket is supplied with each ammeter.

Input Range:

LED Color:

Power Supply:

(45-450Hz)

Ordering Information

Leaded CT (100A model)

RoHS

　

For full details go to

www.murata-ps.com/rohs

ACA-20PC Series

Digital, LED-Display AC Ammeters with

Built-in Current Transformers

www.murata-ps.com

MPM_ACA_20PC.B05 Page 2 of 6