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Ningbo Ambest Electronics Co., Ltd.

Loop Isolator, 2-Wire Loop Isolator, Addressable Loop Isolator manufacturer / supplier in China, offering Addressable 2-Wire Fire Detection and Alarm System Loop Isolator, 24V, State of The Art Fire Alarm Control System, 1 Loop (6001-01), Big Infrastructure Fire Project Fire Alarm Control System, 2 Loop (6001-02) and so on.

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Addressable 2-Wire Fire Detection and Alarm System Loop Isolator, 24V

FOB Price: US $12 / Piece
Min. Order: 200 Pieces
Min. Order FOB Price
200 Pieces US $12/ Piece
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Port: Ningbo, China
Production Capacity: 50, 000 PCS/Month
Payment Terms: L/C, T/T, D/P, Western Union, Paypal

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Basic Info
  • Model NO.: 680
  • Signal Transmission: Wired Alarm
  • Certification: CE, ISO
  • Sensor Type: Electric Alarm
  • Transmission Mode: Cable
  • Colour: White
  • Transport Package: 1/Box, 100PCS/CTN
  • Origin: Ningbo, China
  • Type: Smoke Alarm
  • Working Mode: Active
  • Application: Indoor
  • Working Principle: Electro-Optical Type
  • Usage: Door, Fire, Smoke
  • Trademark: Numens
  • Specification: CE
  • HS Code: 8531100000
Product Description


The 680 loop isolator provides electrical isolation of alarm zone wiring for addressable fire detection control and indicating equipment. The use of the 680 as part of the detector zone wiring ensures that short-circuit faults in the alarm zone loop wiring disable a minimum number of detectors.

Automatic operation
Automatic reset
DC 24 V operation
Compatible with 2-wire fire detection and alarm systems
LED activation indicator


Operating voltage
DC (17 ~ 28) V
Standby current (max)40 µA @ DC 24 V
Continuous current (max)5 mA
Switching current (max)3.0 A
Switching resistance (max)0.3 
Operating temperature(-0 ~ +60) °C
Operating humidity(0 ~ 95) % RH, non-condensing
Operating voltageDC (17 ~ 28) V
DimensionsΦ 99 mm × 40 mm


Ordering Informations

About Numens

Formed in 2010, Numens is an emerging supplier of professional safety products for fire detection and alarm systems. Numens supplies an extensive range of addressable, non-addressable and residential products for life safety and property protection applications. Offering over 150 products and supplying to more than 100 customers around the globe, we are committed to establishing long-term relationships with our customers and suppliers.
Mission and Values
Our mission is to provide building owners with high quality, inexpensive fire detection and related equipment that will protect lives of building occupants and minimize damage to buildings through early detection and warning of a fire emergency.
Our engineers, production and support staff will design, manufacture and deliver products with performance and quality to always delight our customers.
Success in our future depends on the integrity and ethical behaviour of all our employees. We support and nourish our staff to improve and grow as responsible members of a civil society. We take personal responsibility for our actions and respect others with different views, as we continually strive for improvements for our customers, our company and ourselves.
Sales, engineering and production are located in Ningbo, China; just 2 hours south of Shanghai. Our Ningbo site has 10,000 m2 (100,000 ft2) of floor-space. From product concept, electrical and mechanical design, we can provide the solutions to detection needs. Our manufacturing is vertically integrated, with our capabilities including tool-making, plastic injection moulding, SMT manufacturing, and final assembly and test.
You can view our product range on our website or in our product catalogue (document number 34-0001).
Standards and Approvals
Standards approvals are important to us, giving customers additional confidence of the performance and reliability of our products. We are certified to ISO 9001:2008 and our products carry approvals to major European and North American Standards.

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