From around the traps.
From around the traps. Read More »
Missing the point….. again
A customer from WA found this in the course of his travels. Once again a separate fire trip relay has been mistakenly used! To make things worse the power has been fed into the expansion outputs rather than the dedicated inputs. This will work however it makes things harder for the tech who has had
Missing the point….. again Read More »
Missing the point…..
I found this today, a recent install. Maybe we need to make the instructions a little more clear/simple. The installer has used a separate relay to take the fire interface and monitor the fire trip. They have then fed the switched power into the fuse module. The whole point of the PP8FR is to provide
Missing the point….. Read More »
What is next for the Power Port Range?
The time has come to evaluate the current design of the PP8FR and PP4F against current market needs. We would greatly appreciate any feed back or new ideas from installers of our Power Port range. If you have any comments or want to make suggestions for new features please feel free to comment on this
What is next for the Power Port Range? Read More »
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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Spot the problem?
Yes that is a sliding door! This mag lock was installed by a carpenter, it is switched via a cheap hotel style locking system. Obviously this did not work long due to the lock grabbing the armature plate as soon as it slid close to the face. The door would not close and quickly the
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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Australian Standards – Security Systems – Part 2 EOL Resistor Termination
This post partly relates to the ATMOD a Jack Fuse product that houses End of Line (EoL) resistors on a PCB with quick connect terminals. A potential customer recently scoffed at the ATMOD claiming it did not comply with Australian standards. Apparently this customer was under the impression that the standards dictate that resistors must
Australian Standards – Security Systems – Part 2 EOL Resistor Termination Read More »
Australian Standards – Security Systems – Part 1
Recently I have had much discussion with industry work mates relating to the use, reference and implementation of the Australian standards relating to security systems. The standards that relate to installers are mainly: AS NZS 2201.1-2007 Intruder alarm systems – Clients premises – Design installation commissioning and maintenance. AS 2201.3-1991 Intruder alarm systems – Detection
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