So I do not like the currently trending electronic locks with any technology/protocol and I hate it with passion if they are cloud based. I bit the bullet and went ahead with electrified cylindrical locksets from SDC to retrofit my front and rear doors.
They are Grade 1, very nice finish, very solidly built. I had no difficulty installing them, I have foam-filled metal doors, and was easy to drill through. I got the fail-secure version, and these are egress compliant, always open from the inside. Perhaps I will write up all the detail in a blog if there is interest.
I wired them as 12 VDC, and connected it with my Elk M1. All works as expected, except the locks came supplied with a "power regulator" which according to the manual reduces power consumption. It does do so, but also causes an audible whine from the coil inside the lock. My ears have had their fair share of abuse, but I can hear this from rooms over. The metal door likely also amplify it and it is a very high pitched, pulsating whine that is hard to ignore. I reached out the SDC, but not getting through or got any response.
If any of you has experience with this brand, make: SDC Z7252 is this normal?
The PR7200 power rectifier seems to be a small PCB with few components in heatshrink tube, likely acting as a pulse width modulator (PWM), turning off and on the power very quickly and thus saving power, but also causing the whine.
Without the PR7200 the lockset is silent and works fine, it does however become warm to touch, not hot, but warm enough that when you touch it, your brain senses that it is not cold metal. According to its datasheet, the lockset pulls about 600mA at 12 VDC and half of that at 24 VDC. With the power rectifier this is much reduced, to about 0.15-0.20 A at 12 VDC, not sure how accurately measured it.
Another question I have is that the lockset comes standard with a Request-To-Exit (REX) output, with Common. and N.O. and N.C. wires. I do not completely understand the function of these, especially on a egress compliant, fail-secure lock, but it seems that the NC connection is broken and the NO shorted when the lever is depressed.
Thanks for sharing your thoughts.
They are Grade 1, very nice finish, very solidly built. I had no difficulty installing them, I have foam-filled metal doors, and was easy to drill through. I got the fail-secure version, and these are egress compliant, always open from the inside. Perhaps I will write up all the detail in a blog if there is interest.
I wired them as 12 VDC, and connected it with my Elk M1. All works as expected, except the locks came supplied with a "power regulator" which according to the manual reduces power consumption. It does do so, but also causes an audible whine from the coil inside the lock. My ears have had their fair share of abuse, but I can hear this from rooms over. The metal door likely also amplify it and it is a very high pitched, pulsating whine that is hard to ignore. I reached out the SDC, but not getting through or got any response.
If any of you has experience with this brand, make: SDC Z7252 is this normal?
The PR7200 power rectifier seems to be a small PCB with few components in heatshrink tube, likely acting as a pulse width modulator (PWM), turning off and on the power very quickly and thus saving power, but also causing the whine.
Without the PR7200 the lockset is silent and works fine, it does however become warm to touch, not hot, but warm enough that when you touch it, your brain senses that it is not cold metal. According to its datasheet, the lockset pulls about 600mA at 12 VDC and half of that at 24 VDC. With the power rectifier this is much reduced, to about 0.15-0.20 A at 12 VDC, not sure how accurately measured it.
Another question I have is that the lockset comes standard with a Request-To-Exit (REX) output, with Common. and N.O. and N.C. wires. I do not completely understand the function of these, especially on a egress compliant, fail-secure lock, but it seems that the NC connection is broken and the NO shorted when the lever is depressed.
Thanks for sharing your thoughts.