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ASWL2

P. 2 / 3

EM-1619 Rev.2

TERMINAL CONNECTIONS

Connect the unit as in the diagram below or refer to the connec-
tion diagram label on top of the unit.
When an input resistor is provided with the module, attach it 
together with input wiring to the input screw terminals.

FRONT PANEL CONFIGURATION

• Explanations

Hi and Lo setpoint rotary switches are used to set the alarm setpoints.
The Hi and Lo LED lights turn on when the coil for each relay is energized.

• Examples

For setting the relay to trip above 80% of the full-scale input signal, set the Hi 

rotary switch (x10) to "8", while the switch (x1) to "0".

U(+)

V(–)

POWER

7

14

+

*

INPUT

4

R

12

HI OUTPUT

11

2

1

LO OUTPUT

15

10

9

N.C.

N.O.

COM

N.C.

N.O.

COM

*

 Input shunt resistor attached for current input.

CHECKING

1)  Terminal wiring:  Check that all cables are correctly connected 

according to the connection diagram.

2)  Power input voltage:  Check voltage across the terminal 7 

– 14 with a multimeter.

3)  Input:  Check that the input signal is within 0 – 100% of the 

full scale.

4)  Alarm operations:  Check the alarm operations referring to 

the figure below.

5)  Output load:  Check that the output load is 380V AC/120VA or 

125V DC/30W at the maximum (≤0.5A).  For maximum relay 

life with inductive load, external protection is recommended.

Alarm Trip Operation  

T

erminal No. in parentheses

T

rip Operation in Power Failure

Terminals 1 – 2, 9 – 10 turn ON.

0

50

100

Input
(%)

Lo Setpoint

Hi Setpoint

Hi Output

(9–15)ON

Lo Output

(1–2)ON

(1–11)ON

(9–10)ON

6  Lo LED

5  Lo Setpoint Rotary Switch (x1%)

4  Lo Setpoint Rotary Switch (x10%)

3  Hi Setpoint Rotary Switch (x1%)

2  Hi Setpoint Rotary Switch (x10%)

1  Hi LED

HI SET

[%]

x1

x10

LO SET

[%]

x1

x10

MAINTENANCE

Regular calibration procedure is explained below:

CALIBRATION

Warm up the unit for at least 10 minutes.

• Hi Setpoint

Increase the input signal from a value lower than the setpoint and 
check that the trip point remains within the accuracy described 
in the data sheet.

• Lo Setpoint

Decrease the input signal from a value higher than the setpoint and
check that the trip point remains within the accuracy described 
in the data sheet.
When the trip points are out of tolerance, contact M-System's Sales
Office or local representatives.

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