Jack Fuse Products at Sprint Intercom & Security
Jack Fuse products are available from Sprint Intercom & Security.
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Learning with Jack Fuse
Jack Fuse is excited to launch our FREE two-part Product & Power Distribution Certification. Participants will learn how to get the most out of the Jack Fuse product range, ensuring an efficient and safe Jack Fuse installation. Great general power distribution and protection training is also provided, which is useful in any security installation. Topics
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Silencing the DOTL
Door Open To Long (DOTL) sounders are used at a door to warn when the door has been left open longer than a pre-set time. They are also sometimes used in large retail stores with secure fire exits to alert staff if a customer opens the door. The problem is that in the event of
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Product end of life notice: PP4F
The Jack Fuse Power Port PP4F will no longer be stocked by our wholesalers. The PP4F was a four-way direct expansion module for the PP8FR. With the addition of the much more cost effective and smaller PP10HD to the Jack Fuse range we see little reason to continue the PP4F. Data and install notes will
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Security Cable Voltage Drop Part 2 Technical Calculations & Solution
Voltage drop issues in security systems can be avoided with some simple calculations leading to correct cable selection. Theory We power electric locks and other devices via sheathed copper cable. This cable has a known resistance per meter and the electric device will require a known current. The resistance causes the voltage to drop as
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Security Cable Voltage Drop Part 1 – Explanation and Diagnostics
Cable voltage drop refers to the lower potential available at the far end of a cable run compared to the potential available at the power supply end. Voltage drop in access control systems is often ignored until it presents a problem and can be difficult to diagnose. The effect of voltage drop is most often
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Mag Lock Slow to Release?
If you are finding a mag (electromagnetic) lock to be “sticky” or slow to release it is likely that it has a diode connected across the power terminals. Remove it, problem solved. This is a common mistake. The reverse biased diode is supposed to prevent a current spike (often call back EMF) caused by the
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Fail Safe/Secure with PP8FR
I have been asked how to power the locks for a fail safe/fail secure door using the PP8FR. Fail safe/secure doors use two electric locks, one to release on fire or emergency and one to stay locked to maintain access control back into the building. Often this is achieved by controlling the negative/ ground connection
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Fuse on PTC action
Many modern alarm and access control panels make use of PTC fuses. These are resettable fuses that over heat and trip if the current/heat gets above a set threshold. I have seen them used to protect main boards, reader power outputs and so on. PTC fuses generally take a little longer to trip than a
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Free Handle Exits & Fire Trips
A pet bug bear of mine is seeing a consultant dictate that ALL access control doors MUST be fail safe & have a fire trip to unlock the door in the event of a fire alarm. In most cases this is incorrect and leads to a lower level of security, exposing the premises to intrusion.
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