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BEFORE USE ....

Thank you for choosing M-System.  Before use, please check 
contents of the package you received as outlined below.
If you have any problems or questions with the product, 
please contact M-System’s Sales Office or representatives.

 

PACKAGE INCLUDES:

DC alarm (body + base input resistor) ................(1)
Input resistor is provided only with current input type.

 

MODEL NO.

Confirm Model No. marking on the product to be exactly 
what you ordered.

 

INSTRUCTION MANUAL

This manual describes necessary points of caution when 
you use this product, including installation, connection and 
basic maintenance procedures.

POINTS OF CAUTION

 

POWER INPUT RATING & OPERATIONAL RANGE

• Locate the power input rating marked on the product and 

confirm its operational range as indicated below:

  

AC power

: Rating ±10%, 50/60 ±2 Hz, approx. 2VA

  

DC power

:  Rating ±10%, approx. 2W 

 

or 85 – 150V, approx. 2W for 110V rating

 

GENERAL PRECAUTIONS

• Before you remove the unit from its base socket or mount 

it, turn off the power supply and input signal for safety.

 

ENVIRONMENT

• Indoor use.
• When heavy dust or metal particles are present in the 

air, install the unit inside proper housing with sufficient 
ventilation.

• Do not install the unit where it is subjected to continuous 

vibration.  Do not subject the unit to physical impact.

• Environmental temperature must be within -5 to +60°C 

(23 to 140°F) with relative humidity within 30 to 90% RH 
in order to ensure adequate life span and operation.

 

WIRING

• Do not install cables close to noise sources (relay drive 

cable, high frequency line, etc.).

• Do not bind these cables together with those in which 

noises are present.  Do not install them in the same duct.

 

AND ....

• The unit is designed to function as soon as power is 

supplied, however, a warm up for 10 minutes is required 
for satisfying complete performance described in the data 
sheet.

COMPONENT IDENTIFICATION

ASL  

M•UNIT

Model

       x10
HI SET.

(%)    

        X1

       x10

LO SET.

(%)    

        X1

12

34

5

6

7 8 9 0 

12

34

5

6

7 8 9 0 

12

34

5

6

7 8 9 0 

12

34

5

6

7 8 9 0 

Body

Base Socket

Specifications

Input Resistor

 

FRONT PANEL CONFIGURATION

Lo LED

Lo Setpoint Rotary Switch (×1%)

Lo Setpoint Rotary Switch (×10%)

Hi Setpoint Rotary Switch (×1%)

Hi Setpoint Rotary Switch (×10%)

Hi LED

HI SET

[%]

x1

x10

LO SET

[%]

x1

x10

• Explanations

Hi and Lo setpoint rotary switches are used to set the alarm 
setpoints.
The Hi and Lo LED, 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 (×10) to “8”, while the switch 
(×1) to “0”.

INSTALLATION

Detach the yellow clamps located at the top and bottom of 
the unit for separate the body from the base socket.

Clamp

(top & bottom)

DIN Rail

35mm wide

Spring Loaded

DIN Rail Adaptor

Shape and size of the base socket 
are slightly different with various 
socket types.

 

DIN RAIL MOUNTING

Set the base socket so that its 
DIN rail adaptor is at the bot-
tom.  Position the upper hook 
at the rear side of base socket 
on the DIN rail and push in 
the lower.  When removing the 
socket, push down the DIN 
rail adaptor utilizing a minus 
screwdriver and pull.

 

WALL MOUNTING

Refer to “EXTERNAL DI-
MENSIONS.”

DC ALARM

(rotary switch adjustments)

MODEL

ASL

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201  Fax: +81(6)6659-8510  E-mail: info@m-system.co.jp

EM-1613-A  Rev.7  P. 1 / 3

INSTRUCTION MANUAL

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