Define Instruments ACCS-420 Operating Manual

The ACCS-420 split core current trans­mitter converts an AC current signal into
an industry standard 4–20mA signal.

It offers a low cost alternative for
measuring power and monitoring the
operation of fans, pumps, and other
equipment.

› Split core allows easy installation

without disconnecting cables

› Three jumper selectable ranges, for

measuring up to 200A

› 4–20mA loop powered output

1

ACCS-420(-L)

AC Current Sensor

Contents

1 - Specications ............................... 1

2 - Installation & Setup ..................... 2

3 - Troubleshooting ........................... 4

1

Sensor type Current transformer

AC to DC conversion technique Averaging scaled in RMS

Header selectable amperage range ACCS-420: 100/150/200A,

ACCS-420-L: 10/20/50A

Overload (continuous) ACCS-420: 100A= 175A, 150A= 300A, 200A= 400A
ACCS-420-L: 10A= 80A, 20A= 120A, 50A= 200A

Output

Power supply 15–36V DC

Accuracy 1% of full scale

SPECIFICATIONS

4–20mA loop powered

, representing 0–100% of full scale input range

ACCS-420-MAN-15V04 (0630)Copyright © 2015 Dene Instruments Ltd

2

Operating temperature –10 to 50°C (14 to 122°F)

Operating humidity 10–90% (non-condensing)

Response time 250ms (10–90%)

Isolation voltage 2000V

Frequency 50–60Hz

Casing Split core hinged type, screw mounting case, ABS material

Dimensions (H x W x D) 66 x 100 x 32mm (2.6 x 3.9 x 1.3")

2

INSTALLATION & SETUP

RISK OF SHOCK!

DISCONNECT POWER SUPPLY BEFORE MAKING

ELECTRICAL CONNECTIONS.

Contact with components carrying hazardous voltage can cause electrical shock

and may result in severe personal injury or death.

2.1 - Installation

Run the wire that you wish to monitor through the hole in the sensor.

› Press the tab toward the sensor to open.
› After placing the wire in the opening, press the hinged portion down firmly

until a definite click is heard and the tab pops out fully.

› The sensor can be mounted using screw holes in any position, or hung directly

on wires with wire ties.

Keep split core sensors clean. Be careful not to allow grit or dirt to build up on
contacts. Operation can be impaired if the mating surfaces do not have a connection.

Always check visually before closing.

ACCS-420-MAN-15V04 (0630) Copyright © 2015 Dene Instruments Ltd