BEFORE USE ....
Thank you for choosing us. Before use, please check con-
tents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact our sales office or representatives.
■ PACKAGE INCLUDES:
DC alarm (body + base socket + 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 sup-
plied, however, a warm up for 10 minutes is required for
satisfying complete performance described in the data
sheet.
COMPONENT IDENTIFICATION
A•UNIT
LIMIT ALARM
SET.1
SET 1 ADJ
HYSTERESIS
(DEADBAND)
SET 2 ADJ
SET.2
Body
Base Socket
Specifications
Input Resistor
■ FRONT PANEL CONFIGURATION
No.1 LED
No.1
Deadband (Hysteresis) Adj.
No.2
Deadband (Hysteresis) Adj.
No.2 LED
No.1 Setpoint Adj.
No.2 Setpoint Adj.
Zero Adj.
Span Adj.
• Span Adj.
• Zero Adj.
• No. 1 Setpoint Adj.
Used for adjusting No. 1 alarm setpoint.
• No. 1 LED
Turns on when No. 1 alarm is tripped.
• No. 1 Deadband (hysteresis) Adj.
Used for adjusting No. 1 deadband (hysteresis) within 1 –
100%.
• No. 2 Deadband (hysteresis) Adj.
Used for adjusting No. 2 deadband (hysteresis) within 1 –
100%.
• No. 2 LED
Turns on when No. 2 alarm is tripped.
• No. 2 Setpoint Adj.
Used for adjusting No. 2 alarm setpoint.
DC ALARM
MODEL
ACV
EM-2117 Rev.9 P. 1 / 3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
INSTRUCTION MANUAL
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