USP ALPHA-H User manual

Operating Instructions: Interlock Blocking - ALPHA
Description
Unique Safety Products ALPHA is an Interlock Blocking
device designed to provide additional safeguarding to
prevent operators being trapped inside a safeguarded
space in machine guarding applications where whole body
access is required. The ALPHA works in conjunction with
existing interlocking to prevent the unexpected reset or
restart of the safety-related circuit. It works by forcing the
removal of a personnel or safety key before the guard can
be fully opened and preventing the guard from fully closing
until the key is returned. Thus, while the key is with the
operator inside the area, the interlock is blocked from
allowing the machine to be reset or restarted. Additional
padlock points allow for each individual entering the area to
apply their own means of control to the device.
As a purely mechanical component complete with an
integrated mounting plate it is easily retrofitted or added to
an existing system, regardless of interlock type, without the
need for wiring or programming.
Options & Ordering Information
Description Part No.
ALPHA suitable for Left hand facing Hinged Doors ALP2H-1-1-CLSS-MP1
ALPHA suitable for Right hand facing Hinged Doors ALP4H-1-1-CLSS-MP1
ALPHA suitable for Left hand facing Sliding Doors ALP2S-1-1-CLSS-MP1
ALPHA suitable for Right hand facing Sliding Doors ALP4S-1-1-CLSS-MP1
NOTICE!
The ALPHA is not an interlock and must only be used in addition to an interlock as part of a safety related part of a control
system that meets required reliability.
The 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 installation and operating instructions enclosed. It
must be installed by competent and qualified personnel who have read and understood the whole of this document prior to
commencing installation.
If the Device or guarded machinery equipment is used in a manner not specied by the manufacturer, the protection provided
by the equipment may be impaired.
Any modification to or deviation from these instructions invalidates all warranties.
Unique Safety Products and Fortress Interlocks Ltd accept no liability whatsoever for any situation arising from misuse or
misapplication of the Device. The ALPHA alone is not an Interlock and must only be used in addition to an Interlock as
part of a complete machine guarding system. The paired Interlock device must meet all relevant safety requirements
and applicable safety standards.
BEWARE OF INTENTIONAL MISUSE CAUSED BY OPERATORS WANTING TO BYPASS SAFETY SYSTEMS. THE
INSTALLER SHOULD ASSESS THE RISKS AND MITIGATE AGAINST THEM.
The installation and operation of the ALPHA and the complete machine guarding system must take into account the
requirements of ISO 14119:2013, in particular Section 7 - Design for minimising defeat possibilities.
In order to maintain device safety rating, overall machine guarding system must be validated to EN ISO 13849-2 and/or
evaluated in accordance with IEC 62061.
IF YOU HAVE ANY QUESTIONS OR QUERIES OF ANY NATURE WHATSOEVER PLEASE CONTACT THE SUPPLIER
WHO WILL BE PLEASED TO ADVISE AND ASSIST.
ALPHA-H
ALPHA-S
Unique Safety Products | www.uniquesafetyproducts.com | [email protected]

Technical Specication
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 specied 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 locking 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 fitted
• 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 - ALPHA
Unique Safety Products | www.uniquesafetyproducts.com | [email protected]
ALPHA

Figure 1: Dimensional Drawing - ALPHA for Hinged, Left Hand Entry
Figure 2: Dimensional Drawing - ALPHA for Hinged, Right Hand Entry
FORTRESS
A company
Halma
www.fortressinterlocks.com
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 DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SCALE: 0.33 SHEET: 1 OF 1
ORIGINAL SIZE DATE: 10-11-2020 ISSUE: 0-B
INTERLOCK BLOCKING DEVICE FOR HINGED, LEFT HAND ENTRY DWG NO: SD-00022
DOOR CLOSED STATE
DOOR OPEN STATE
IBL SHOWN IN LEFT HAND FACING CONFIGURATION
(EXAMPLE PART NUMBER: ALP2H-1-1-CLSS-MP1)
DOOR ENTRANCE
THIS SIDE OF
DEVICE
BLOCKER PLATE
ENGAGED AND
PREVENTING DOOR
FROM CLOSING
PADDLE PLATE
ENGAGED AND
PREVENTING DOOR
FROM OPENING FULLY
FORTRESS
A company
Halma
www.fortressinterlocks.com
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 DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SCALE: 0.50 SHEET: 1 OF 1
ORIGINAL SIZE DATE: 10-11-2020 ISSUE: 0-B
INTERLOCK BLOCKING DEVICE FOR HINGED, RIGHT HAND ENTRY DWG NO: SD-00023
DOOR CLOSED STATE
DOOR OPEN STATE IBL SHOWN IN RIGHT HAND FACING CONFIGURATION
(EXAMPLE PART NUMBER: ALP4H-1-1-CLSS-MP1)
DOOR ENTRANCE
THIS SIDE OF
DEVICE
BLOCKER PLATE
ENGAGED AND
PREVENTING DOOR
FROM CLOSING
PADDLE PLATE
ENGAGED AND
PREVENTING DOOR
FROM OPENING FULLY
Operating Instructions: Interlock Blocking - ALPHA
Unique Safety Products | www.uniquesafetyproducts.com | [email protected]

Operating Instructions: Interlock Blocking - ALPHA
Unique Safety Products | www.uniquesafetyproducts.com | [email protected]
Figure 3: Dimensional Drawing for ALPHA-S
Figure 4: Dimensional Drawing for ALPHA-S
FORTRESS
A company
Halma
www.fortressinterlocks.com
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 DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SCALE: 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
ENGAGED AND
PREVENTING DOOR
FROM OPENING FULLY
BLOCKER PLATE
ENGAGED AND
PREVENTING DOOR
FROM CLOSING
FORTRESS
A company
Halma
www.fortressinterlocks.com
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 DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SCALE: 0.50 SHEET: 2 OF 3
ORIGINAL SIZE DATE: 18-05-21 ISSUE: 0-A
INTERLOCK BLOCKING DEVICE FOR SLIDING DOORS DWG NO: SD-00030

Operating Instructions: Interlock Blocking - ALPHA
Unique Safety Products | www.uniquesafetyproducts.com | [email protected]
Figure 5: Operational Sequence for ALPHA-S
FORTRESS
A company
Halma
www.fortressinterlocks.com
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 DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SCALE: 1.00 SHEET: 3 OF 3
ORIGINAL SIZE DATE: 18-05-21 ISSUE: 0-A
INTERLOCK BLOCKING DEVICE FOR SLIDING DOORS DWG NO: SD-00030
DOOR CLOSED STATE KEY TURNED STATE DOOR OPEN STATE

Operating Instructions: Interlock Blocking - ALPHA
Unique Safety Products | www.uniquesafetyproducts.com | [email protected]
Tools and Fixings Required
• Minimum 2 x M8 screws for securing the ALPHA.
• Minimum 1 M8 Screw for securing the ALPHA-S Knob.
• Screws must be suitable length for a minimum of 10mm thread engagement.
• Screws must be security type to prevent unauthorised removal or tampering.
• Required torque setting; 40 Nm.
• 2 x M8 Nut / T-Nut / Threaded Hole for securing the ALPHA.
• 1 x M8 Nut / T-Nut / Threaded Hole for securing ALPHA-S Knob.
• Driver suitable for securing M8 screws.
•Adhesive Threadlocker to secure mounting fixings from loosening due to vibration.
Mounting
1. Locate the ALPHA so that it can correctly Block the Door or Gate with both the front mounted Paddle and rear mounted
Blocker plates. See Fig. 1 and Fig.2 for details.
2. Secure the ALPHA using minimum 2 x M8 screws through the available mounting holes at the top and bottom of the rear
mounted mounting plate. Secure the ALPHA-S Knob using 1 x M8 screws through the centre of the knob.
3. Perform Mechanical Function tests before completing installation and commission. See Mechanical Function test section
for more details.
Mount the complete device only in the correctly assembled condition.
•All mounting surfaces should be flat, stable and suitable of providing a minimum of 10mm M8 thread engagement or
sufficient support to either an M8 Nut or M8 T-Nut.
• The ALPHA device must be located so that scheduled inspection and maintenance procedures are all easily possible.
• The complete machine guarding installation must conform to all relevant design, construction and installation standards
and guidelines.
• Any gap around the perimeter of the machine 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 prevented from removal. If mounting fixings are
visible, they must be secured against removal by personnel using standard tools, manipulation and un-authorised or un-
identifiable removal. If mounting fixings are not visible or hidden, they must be secured against removal or loosening due
to vibration. In both cases, a middle strength adhesive threadlocker is required.
• The complete Device must not be used as a mechanical stop. Where applicable, precautions must be made to ensure the
door or gate of any guarded area has sufficient support and stops to prevent the impact on the Device.
Note: that it is not possible for a left-hand facing ALPHA-2H device to be reconfigured or re-assembled as a right-hand
facing ALPHA-4H device. If alternative handing and orientation is required, please contact Unique Safety Products
Note: For ALPHA-S the device is the same for left and right hand just rotate the device 180 degrees
Mechanical Function Test Instructions
Test 1
1. Remove the locking mechanism of existing Door lock or Interlock product if tted.
2. Open the Door or Gate.
It must not be possible to fully open the Door or Gate until the Personnel Key has been rotated and removed.
Test 2
1. Fully open the Door or Gate open and remove the Personnel Key.
2. Close the Door or Gate.
It must not be possible to fully close the Door or gate until the Personnel Key has been re-inserted and rotated.
It must not be possible for the existing Door lock or Interlock (if tted) to re-engage until the Personnel Key has been
re-inserted and rotated.
It must not be possible for a machine restart signal to be generated (such as via an additional Door lock or Interlock)
until the Personnel Key has been reinserted and rotated.

Operating Instructions: Interlock Blocking - ALPHA
Unique Safety Products | www.uniquesafetyproducts.com | [email protected]
Service and Inspection
Regular inspection of the following is necessary to ensure trouble-free, lasting operation:
• Correct operating function
• Secure mounting of components
• Debris and wear
• WD40 lubricant or equivalent, should be applied to each mechanical element every 10,000 operations, or sooner, to ensure
smooth product operation and function. There are no user serviceable parts in this product. If damage or wear is found with
an assembly, please contact Unique Safety Products for a replacement. The complete device must be replaced after 1
million operations.
Disposal
This interlock does not contain any certied hazardous materials so should be disposed of as industrial waste. Electrical
items should not be disposed of in general waste and must be appropriately recycled.
Liability 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 personnel.
• Non-implementation of functional checks.
Protection Against Environmental Inuences
A lasting and correct safety function requires that the device be protected against the ingress of foreign bodies such as swarf,
sand, blasting shot, etc. The device is to be mounted away from the machine, or by the use of anti-vibration mountings, in
order to avoid the effects of vibration, shock and bump.
Use in Dusty Environments: Careful product selection is required, which is best performed under the guidance of a Unique
Safety Products Representative, in order to assess the dust type and product style required.
Use in Corrosive Environments: Careful product selection is required, which is best performed under the guidance of a
Unique Safety products Representative.
The manufacturer reserves the right to modify the design at any time and without notice.
This guide should be retained for future reference.