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Technical Specification

Construction Materials

316 Stainless Steel and Stainless Steel to BS3146-2:1975 (ANC4B)

Mechanical life

1,000,000 operations

Ambient Temperature

-25°C to +80°C**

Shock and Vibration Resistance

Tested in accordance with IEC 60068-2-6 and IEC 60068-2-27

Environment Type

Indoor & Outdoor 

Maximum Door Thickness

70mm at ≥600mm door width*

*Note; any gaps in door frame when closed must not exceed the limits specified in BS EN ISO 13857.

**The units will only continue to work below freezing point (0°C) where it can be guaranteed that ice will not form on or in the unit; as it will cause the mechanical parts to bind and 
jam.

Safety Functions

Part No.

Safety Function 1 

Prevent unexpected machine restart.

Functionality

The ALPHA

 is to be used to add additional safeguard functionality to an existing Door, Gate or Hatch that is guarding a 

hazardous or unsafe area.
The front mounted Paddle of the 

ALPHA

 ensures the Door or Gate that the product is mounted to cannot be fully opened 

until a Personnel / Safety Key has been taken. Once the Key has been removed a rear mounted Blocker plate extends out-
wards between the Door or Gate and the hazardous or unsafe area. When extended, the Blocker plate prevents the Door or 
Gate from being re-closed and locked before the Personnel Key has been reinserted and rotated. Padlocks can be added 
to the Blocker plate for additional Interlock Blocking functionality.

Opening a Door or Gate with an 

ALPHA

  itted

• Remove the l

ocking mechanism of existing Door lock or Interlock product if fitted.

• Open the Door or Gate until it comes into contact with the extended Paddle of the 

ALPHA

.

• Rotate and remove the Personnel Key of the 

ALPHA

. The paddle is sprung loaded. As the key is removed it will spring

away from the door, covering the Personnel lock. Simultaneously, rotation of the Personnel key will revolve the blocker
plate behind the gate. For Sliding Gates - slide door back to end of slot

• Open the Door or Gate fully.
• For sliding doors the hook will be removed from the knob holding the door closed.

Closing a Door or gate with an 

ALPHA

 

f

itted

• Close the Door or Gate until it rests against the extended Blocker plate of the 

ALPHA.

• Rotate the paddle clockwise until the entry to the personnel lock is exposed.
• Open the dustcover insert and rotate the Personnel Key into the 

ALPHA

.

• Fully close the Door or Gate.
• For sliding doors rotate paddle and slot knob in opening of paddle

Operating Instructions: Interlock Blocking - 

A

L

PHA

Unique Safety Products | www.uniquesafetyproducts.com | [email protected] 

ALPHA

Summary of Contents for ALPHA-H

Page 1: ...ALPHA cannot be used in conjunction with an Interlock that includes an Escape Release or Internal facing handle Important The ALPHA Interlock Blocking Device is designed for use according to the inst...

Page 2: ...When extended the Blocker plate prevents the Door or Gate from being re closed and locked before the Personnel Key has been reinserted and rotated Padlocks can be added to the Blocker plate for additi...

Page 3: ...R PLATE ENGAGED AND PREVENTING DOOR FROM CLOSING PADDLE PLATE ENGAGED AND PREVENTING DOOR FROM OPENING FULLY FORTRESS www fortressinterlocks com THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTER...

Page 4: ...LE 1 00 SHEET 1 OF 3 ORIGINAL SIZE DATE 18 05 21 ISSUE 0 A INTERLOCK BLOCKING DEVICE FOR SLIDING DOORS DWG NO SD 00030 DOOR CLOSED STATE DOOR OPEN STATE DOOR ENTRANCE THIS SIDE OF DEVICE HOOK PLATE EN...

Page 5: ...m THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE DISCLOSED TO ANY 3rd PARTY WITHOUT SPECIFIC WRITTEN APPROVAL ALL DIMENSIO...

Page 6: ...chine and guarding when closed and locked Safety Outputs High must not exceed the limits specified in ISO 13857 ISO 14120 All fixing screws used to mount the complete Device must be permanently preven...

Page 7: ...ility Coverage is Voided Under the Following Conditions If these instructions are not followed Non compliance with safety regulations Installation and electrical connection not performed by authorised...

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