Two door normally-closed interlock module

  • Allows only one of two-doors to be unlocked at a time
  • Power with 12V DC
  • Available with time delay
  • Mild steel enclosure with tamper switch
  • Made in Britain with 5 year warranty

DA550: Two door normally-closed interlock module

This is a two-door interlock system that monitors the states of both doors. Upon request, the unit will release a door while the request exists, and only if the other door is secure (i.e. door not released and door contacts closed). 12V DC operation.

Ordering information

DA550T: Timed two-door normally-closed interlock module

This is a two-door interlock system that monitors the states of both doors. Upon request, the unit will release a door while the request exists, and only if the other door is secure (i.e. door not released and door contacts closed). 12V DC operation.

Ordering information

Example of an interlock module operation:

DA550: Two door, normally-closed interlock.

The button for door A is pressed. Control for door B is tested. If not released, then monitor for door B is tested. If secure, contacts for door A are operated for time set by your controller.

During this time a signal prevents B from operating. While door A is open the monitor also prevents B from operating. Door B cannot be released until door A release times out and door A is secure.

Ordering information

Technical information

Download Data sheet

Switching contacts - (Door release)

DA550 DA550T
Interlocked doors Two Two
Delay timer None Selectable 4≲5 or 8≲10 seconds
Contact configuration Single pole change-over (Per door) Single pole change-over (Per door)
Voltage Maximum 30V Maximum 30V
Current Maximum 1A Maximum 1A
Connection type PCB terminal block (2.5mm²) PCB terminal block (2.5mm²)

Input
Voltage10.5 > 14V DC
Power consumption< 50mA
Connection typePCB terminal block (2.5mm²)
Door monitoring contactsRequires; 2x normally open switch contacts (door is assumed to be closed when closed-circuit, and door open on open-circuit )
Request to exit contactsRequires; 2x normally open switch or +12V DC feed (Request to open door is made on closed-circuit or +12V DC feed )

Environmental

Operating temperature -10°C to +40°C
Storage temperature -20°C to +50°C
Operating relative humidityMaximum 95% non-condensing
Ingress protection IP20

Dimensions:

Product

Width 155mm
Height 207mm
Depth 55mm
Weight < 1.05Kg
Enclosure material Mild steel
Finish Powder coated RAL9016 (White)

Shipping packaging

Width 170mm
Height 220mm
Depth 65mm
Weight *including product< 1.2Kg
Packaging materialCardboard

Ordering information

GTINPart codeDescription
DA550Two door normally-closed interlock module
DA550TTimed two-door normally-closed interlock module

Available from all good distributors.