EARTH LEAKAGE CURRENT DETECTOR

M54128L/FP

MITSUBISHI <CONTROL / DRIVER IC>

Power supply

Output pin of internal constant-voltage circuit. Connects to capacitor for decoupling.

Connects to resistor which sets constant current of each internal circuit. Approx. 1.3V.

Grounding

Input reference level pin of the leakage detection circuit. Approx. 2.7V.

Another input pin of the leakage detection circuit.

Connects to capacitor for integrating output signals of the leakage input signal level discriminator.

Connects to condeser for removing noise.

Logic function switching pin used when detecting leakage.

→ positive input →

negative input.

W

→ positive input.

This IC will be restored to the initial condition after the specified period if :

leakage input signal does not continue ; abnormal voltage input signal does not continue ; or

leakage/abnormal voltage is detected and SCR becomes ON.

The pin connects to capacitor for time settinng of this function.

Input pin of the abnormal voltage detection circuit.

Connects to capacitor for time setting of the abnormal voltage detection circuit.

Output pin for drive a SCR.

PIN FUNCTION DESCRIPTION

Function

Common

Leakage detection, abnormal voltage detection, SCR drive circuits

Pin No.

Pin name

LFP

1

3

4

5

6

7

8

9

10

11

12

14

13

2

8

10

11

9

7

6

5

4

3

12

1

2

13

14

GND