Recently one of my re-sellers had to rush to site with a replacement module for a PP8FR that had a “faulty” output. Fuse one would blow every time power was applied to the board. On inspection I removed the main output terminal plug and found a single strand off copper shorting the output. I brushed […]
Care when terminating. Read More »
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
Fuse on PTC action Read More »
I have noticed a couple of installs where the technician connecting the Jack Fuse Power Port 8FR has made extra work for themselves by either interfacing a VDC fire trip locally with a separate relay or alternatively I have found one or two situations where the DC power supply voltage has been separately wired back
Power Port Fire Interface Read More »
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.
Free Handle Exits & Fire Trips Read More »
Recently I have had several enquiries regarding the Building Code of Australia (BCA) in relation to fire trips. Security installers, consultants and clients often have conflicting ideas about what is required under the BCA. This leads to confusion and doubt, access to the BCA is not cheap and therefore it is often not consulted. This
Electric locks & Fire Trips Read More »