K8AB-AS

7

■ Operation and Setting Methods

Setting Ranges and Wiring Connections

Note: 1. The DC input terminals have no polarity.

2. The K8AB-AS3 is designed to be used in combination with

the OMRON K8AC-CT200L Current Transformer (CT).

(Direct input is not possible.)

Connections

1. Input

Connect the input between the I1-COM, I2-COM, or I3-COM terminals, according to the input

current. Malfunctions may occur if the input is connected to unused terminals and the Unit will

not operate correctly.

Terminal I1 is not used by the K8AB-AS3.

If using the OMRON K8AC-CT200L CT, connect to terminals k and l on the K8AC-CT200L.

(Terminals kt and lt are not used.)

2. Power Supply

Connect the power supply to terminals A1 and A2.

3. Outputs

SPDT relays are output to terminals 11, 12, and 14.

Note: Use the recommended ferrules if using twisted wires.

DIP Switch Settings

The resetting method, relay drive method, and operating mode are set using the DIP switch located on the bottom of the Unit.

K8AB-AS

@ does not use SW1.

Setting Method

1. Setting Current

The current knob (SV) is used to set the current.

The current can be set to 10% to 100% of the maximum measuring current.

Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the

same level.)

Use this as a guide to set the current.

The maximum measuring current will differ depending on the model and the input terminal.

Example: K8AB-AS3 Using Input Terminals I3-COM

The maximum measuring current will be 200 A AC and the setting range will be 20 to 200 A.

Model

Measuring current

Wiring

connection

K8AB-AS1

2 to 20 mA AC/DC

I1-COM

10 to 100 mA AC/DC

I2-COM

50 to 500 mA AC/DC

I3-COM

K8AB-AS2

0.1 to 1 A AC/DC

I1-COM

0.5 to 5 A AC/DC

I2-COM

0.8 to 8 A AC/DC

I3-COM

K8AB-AS3

10 to 100 A AC (See note 2.)

I2-COM

20 to 200 A AC (See note 2.)

I3-COM

<For K8AB-AS3>

k

l

Load

Current input

Signal output

K8AC-

CT200L

14

12

A1

A2

I1

I2

I3

11

Relay

signal

output

COM

K8AB-AS3

Single-phase power

Power supply

voltage

ON

OFF

SW1

SW2

SW3

SW4

DIP switch

DIP Switch Functions

Note: All pins are set to OFF at the factory.

SWITCH

ON

● ↑

OFF

❍ ↓

Resetting method

Automatic reset

---

---

●

NO USE

Manual reset

---

---

❍

Relay drive method Normally closed

---

●

---

Normally open

---

❍

---

Operating mode

Undercurrent

●

---

---

Overcurrent

❍

---

---

ON

OFF

4

3

2

1