ACA-20PC-3-AC1-RL 查看數據表（PDF） - DATEL Data Acquisition products

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ACA-20PC-3-AC1-RL

Digital, LED-Display AC Ammeters with Built-in Current Transformers

DATEL Data Acquisition products  

®

®

Order on-line

at www.datel.com

E156931

Features

• Built-in Current Transformers for direct

measurement of 0 to 2/20/50/100 Amps

• Functionally complete:

On-board current transformers

Scaling/interface circuitry

Precision A/D converters

Bright red or green LED displays

• 32 different models

• Subminiature, 1.38" x 0.88" package

• Easy-to-read, 0.37"/9.4mm digits

• AC powered models:

85-264Vac @ 50/60Hz

240-310Vac @ 50/60Hz

85-140Vac @ 400Hz

• "Self-powered" 85-264Vac, 2A and 20A

models feature built-in load connections

• DC powered models:

+5V, +5-40V, +36-75V

• 2000V isolation; UL/CSA recognized

ACA-20PC Series

Digital, LED-Display

AC Ammeters with Built-in

Current Transformers

DATEL's new ACA-20PC Series are the first digital ac ammeters to incorporate on-

board current transformers (CT’s), and they are amazingly easy to use. Simply pass the

current-carrying load wire through the ACA-20PC’s on-board CT, apply power to the

meter's two supply terminals, and you’re instantly measuring ac currents over one of four

ranges (0-2A with 1mA resolution, 0-20A with 10mA resolution, or 0-50A and 0-100A with

100mA resolution). Absolutely no external components, such as expensive low-value

shunts or 5A "donut" CT’s, are required.

Meters are ac powered (120/220/277Vac @ 50/60Hz or 120Vac @ 400Hz) or dc

powered (+5V, +5-40V, or +36-75V) and impose minimal loads (50mA max. and 120mA

max., respectively) on their supplies. All models employ auto-zeroing circuits, precision

bandgap references, and super stable thin-film resistors for unsurpassed accuracy

(±0.15%FS) and stability.

The functionally complete ACA-20PC ammeters provide all the scaling/interface

circuitry to mate the CT’s output to a precision (3½ digit) A/D converter. The A/D's output

goes directly to drivers for the meters’ large (0.37"/9.4mm digit height), easy-to-read, LED

displays. AC-powered units have on-board AC/DC converters, and wide-range dc-powered

units have on-board linear regulators. AC-powered models can be powered by the same

ac supply whose current they are monitoring. The 2A and 20A, 85-264Vac, 50/60Hz

("AC1") models feature additional on-board terminal blocks to supply power to the external

load. All models provide 2000Vdc isolation between the measured ac current and their

power supply, and all are UL/CSA recognized.

Each meter is housed in a subminiature, 1.38" x 0.88", epoxy-encapsulated package.

Total behind-the-panel installation depth is approximately 2 inches. Display color options

include standard red, high-intensity red, and standard green.

PRECISION

FULL-WAVE

RECTIFIER

BUILT-IN

CURRENT

TRANSFORMER

(L1)

CAL.

+

3½ DIGIT

A/D CONVERTER

–

+V

–V

POWER

CONVERTER

A

B

+–

TB1

LED DISPLAY

MEASURED AC

LOAD CURRENT

AC or DC

INPUT POWER

Figure 1. ACA-20PC Series Simplified Schematic

DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 • E–mail: sales@datel.com • Internet: www.datel.com

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