The Locks are very resistant to dust and tolerant of the continuous and frequent grinding they receive and should complete a full working life if treated respectfully and receive some lubrication. Fortress locks are factory lubricated with WD40 or equivalent but have been proven to operate satisfactorily with almost any type of lubricant all the way up to high temperature greases!

To counter problems in the harsh cement and concrete industry, the answer usually lies in the plants themselves! Most concrete product manufacturer have moulds that they need to release their concrete products from, and usually pre-lubricate the mould with diesel oil based mould oil or an environmentally friendly nut or vegetable oil substitute with some additives. A pre lubrication with, or even immersion in, the release agent and subsequent reapplication, should keep Fortress Interlocks working happily for years even where cement is present.

All LOK units use a 12W solenoid. The current will depend on the voltage of the unit:
24V - 500mA (0.5A)
48V - 250mA
110V - 109mA

The solenoids are 100% (Continuously) rated. They are capable of being left on indefinitely, assuming they are operated within the requirements of the Installation and Maintenance Instructions.

Either – the PCB includes a rectifier so it doesn’t matter.

It doesn’t matter; the unit will work if the connections are made either way round.

The Override keys are tested before dispatch to ensure that they reset the Internal Release if fitted. However, in order to install the product, the lid has to be removed and this can effect this function. Please also refer to The proper procedure for resetting the Internal Release on a LOK product.

1. Whilst the door is open, twist the Internal Release knob, Anti-Clockwise until it pops out.
2. Exit the guarded area, ensuring there is no one else inside the protected zone, and close the door (Make sure that the Tongue/Handle is fully inserted into the head).
3a. If you have a Power-to-Unlock unit:

I. Ensure that power has been removed from the solenoid.
II. Insert the ‘Override’ key and rotate it 90 degrees clockwise.
III. Remove the ‘Override’ key and check that the Tongue/Handle is locked in place.
IV. The override label must be replaced.
V. If the Tongue/Handle is not locked, isolate the unit, remove the lid and press the plunger that operates the Internal Release, to reset the mechanism. Refit the lid before continuing.

3b. If you have a Power-to-lock unit:

I. Ensure that power has been removed from the solenoid.
II. Re-apply power to the solenoid and check that the Tongue/Handle is locked in place.
III. If the Tongue/Handle is not locked, isolate the unit, remove the lid and press the plunger that operates the Internal Release, to reset the mechanism. Refit the lid before continuing.

For standard, non multi-bolt assemblies, there can be up to four key adaptor units. We have made assemblies with more adaptors, in the past, but special measures have to be taken to do so.

The mean time to failure will depend on the application and particularly on the frequency of operation. LOK and STOP products are tested to 1 Million Operations. This can be used in conjunction with machine related data to generate MTTF figures.

Yes – The Installation category refers to the safety system and not the individual components that make up the system.

No – Firstly it is not currently possible to assign an Installation Category to the products that we make. Secondly, the categorization refers to the Installation. Therefore the Installation category depends on both the selection and application of the safety components as well as the risks to be protected against.

Many of our products are available with QD systems. Please contact a Sales representative for details of which products and the standard connections for them.

The control Circuits in a Lok and Stop product:

The control circuits in the Lok and Stop product as well as the Key Switch Option Pod are rated at 3A maximum. The contacts can handle a higher current but the rating is derated due to the limit of the PCBs that the
terminals are wired to.

 

Option Pod Key switch:

The maximum Voltage of 110Vac is governed by the spacing between the tracks and the type of PCB substrate used.

Try the following:
www.as-interface.co.uk/ASi-tech/2004/ASi_Installation_Guidelines.doc
www.as-interface.com/ASi-tech/2004/General_ASi_Maintenance%20Guide.doc

The current requirement is too great and would drastically limit the number of units that could be fitted to a system.

The LOK AS-I unit requires a 24Vdc Auxiliary Supply. Please refer to the Installation Instructions for details.

The output bit associated with the solenoid must be set high. Please refer to the Installation Instructions for details.