DH-55 Metal Door Contact – NC & NO/NC 3-Wire Magnetic Sensor

Technical Specifications

• Model: DH-55

• Contact Variants:
  – NC magnetic contact
  – NO/NC 3-wire universal magnetic contact

• Housing Material: Metal alloy body

• Wiring: Hard-wired terminal contact

• Mounting: Surface mount for metal doors & frames

• Applications: Industrial doors, shutters, gates, entry doors

• Compatible Systems: Alarm panels, access controllers, relays, automation

FAQs

Q: What is the main difference between NC and NO/NC 3-wire version?
A: NC supports Normally Closed only. The 3-wire model supports both NO and NC wiring for flexible installation.

Q: Can DH-55 be mounted on metal doors?
A: Yes, the metal housing and strong magnet are designed for metal door installations.

Q: Can it be connected to an alarm panel?
A: Yes, DH-55 works with most wired security alarm systems.

Q: Is this suitable for shutters and industrial gates?
A: Yes, DH-55 is ideal for heavy entry points and industrial sites.

Applications / Use Cases

• Industrial shutter doors

• Metal gates and warehouse doors

• High-security entry monitoring

• Access control systems

• CCTV alarm integration

• Smart relay automation systems