Gold Member Since 2012
Audited Supplier
Ningbo Ambest Electronics Co., Ltd.

Input Module, 2-Wire Input Module, Addressable Input Module manufacturer / supplier in China, offering Addressable 2-Wire Fire Detection and Alarm System Zone Input Module, 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.

(/ )

Supplier Homepage Product Old Products Addressable 2-Wire Fire Detection and Alarm System Zone Input Module, 24V

Addressable 2-Wire Fire Detection and Alarm System Zone Input Module, 24V

FOB Price: US $18-18 / Piece
Min. Order: 500 Pieces
Min. Order FOB Price
500 Pieces US $18-18/ Piece
Get Latest Price
Production Capacity: 50, 000 PCS/Month
Transport Package: 1/Box, 100PCS/CTN
Payment Terms: L/C, T/T, D/P, Paypal, Western Union

Request a custom order and have something just for you!

Send Customized Request
Basic Info
  • Model NO.: 621
  • Signal Transmission: Wired Alarm
  • Certification: CE, ISO
  • Sensor Type: Electric Alarm
  • Transmission Mode: Cable
  • Connection: up to 32 PCS Devices
  • Specification: CE
  • HS Code: 8531100000
  • Type: Smoke Alarm
  • Working Mode: Active
  • Application: Indoor
  • Working Principle: Electro-Optical Type
  • Usage: Door, Fire, Smoke
  • Trademark: Numens
  • Origin: Ningbo, China
Product Description


621 addressable alarm zone input modules provide the interface to connect non-addressable input devices (such as detectors or manual call points) to Numens addressable control and indicating equipment.




  • Signals normal, alarm and open-circuit alarm zone conditions
  • Capable of supplying 35 mA to power non-addressable devices
  • Fault condition indicator
  • DC 24 V operation
  • Easy installation with simple address setting DIP switches
  • 125 usable detector address settings per loop



Addressable 2-Wire Fire Detection and Alarm System Zone Input Module, 24V


Operating voltageDC (17 ~ 30) V
Quiescent current with 10 µF EOL fitted4.5 mA + detector load
Quiescent load(6.2 ~ 47) k
Zone output current≤ 35 mA
Zone output voltageLoop voltage - 1 V
Sampling time1 s
Alarm current25 mA
Alarm load≤1.3 k
Zone short-circuit current35 mA
Number of inputs1
Usable addresses per loop125
Number of connected input devices (typical)32
Alarm indicatorRed
Polling indicatorFlashing green
Fault indicatorYellow
Terminal wiring(0.4 ~ 2.5) mm2
Operating temperature(-10 ~ +50) °C
Operating humidity(0 ~ 95) % RH, non-condensing
Dimensions (w × h × d)(95 × 95 × 42) 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.


Send your message to this supplier
Ms. sandy
Sales Manager
To: Ms. sandy

Enter between 20 to 4,000 characters.

This is not what you are looking for? Post a Sourcing Request Now