ACA-20PC-3-DC1-GL(2003) Просмотр технического описания (PDF) - DATEL Data Acquisition products

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ACA-20PC-3-DC1-GL
(Rev.:2003)

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 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

85-140Vac @ 400Hz

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

models feature built-in load connections

• +5-40V dc powered models

• 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 (120/220Vac @ 50/60Hz or 120Vac @ 400Hz) or dc powered

(+5-40V) 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.

P R E C IS IO N

F U L L -W A V E

R E C T IF IE R

B U IL T -IN

CURRENT

TR AN SFO R M ER

(L 1 )

C A L.

+

3 ½ D IG IT

A /D C O N V E R T E R

–

+V

–V

PO W ER

C O N VER TER

A

B

+–

TB1

L E D D IS P L A Y

M EASURED AC

LO A D C U R R E N T

A C orD C

IN P U T P O W E R

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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