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FAQs

Why does the PS900 power supply not provide any DC output when AC power light is on?

Resolution: The following items may cause the PS900 series power supply to have no DC output voltage. 1. If the DC voltage selection jumper is missing, the power supply will not provide any D...:

When arming Guard-X device, it goes straight into alarm.

Resolution: Check option 1 then 2 below: 1. The spring clip (detent spring) on the center case chassis may not be at a right angle causing the Guard-X device to go into alarm when device is disarmed. See att...:

Is there a conversion kit to electrify the LP373L lever control?

Resolution: There is not a conversion kit to electrify the LP373L lever control. You need to order a complete E-LP373L-BE control through Engineering Specials.:

Can two M490DE / M490DEP lock be used on a double door to implement delayed egress.

Resolution: No the M490DE-2. must be ordered this way to have a master slave pair. The slave unit is a unique stripped down version of the master unit, specifically designed for double ...:

3347A bottom latch dragging.

Resolution: The following items may cause the exit devices top and bottom latch from being held in the retracted position:The top or bottom rods are out of adjustment.The top latch hold back fea...:

In a 88 series device, what spring is used to return the bar?

Resolution: In a 88 series exit device the end case spring returns the crossbar.:

Are you able to see the AR option outside of the ALK?

Resolution: You will not see the AR option as the automatic reset is within the board.:

Can Schlage key blanks be ordered as each or do they have to be in boxes of 50?

Resolution: Most Schlage key blanks have to be ordered in multiples of 50. Exceptions listed below: Multi-section (a.k.a. hierarchy section) key blanks All Control key blanks All&...:

Does the ALK have 24vdc terminals on the circuit board?

Resolution: The Von Duprin exit alarm ALK shipped after November 2010 are new style boards and can be identified by the 3 terminal blocks and LED. Only these ALK will work with 24vdc power supply.:

How do I change the handing on my 7500 mortise lock?

Resolution: You can reference the 7500 mortise lock rehanding instructions. Remove the two screws from mortise lock faceplate. Remove the face plate and the collar from the mortise lock then rotate the la...: