GERSIKMagnetic Door Lock, 600LBS 280kg Holding Force Electromagnetic Lock, DC 12V Fail-Safe Mode Door Access Control System, Outswing Door Security

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If you get a power spike or whatever, you can wire around the "potted" electronics by cutting wire off as close to pot as possible, only have about 1 1/2" left. ......... remove pot, mounted with double sided tape. If using 12 volts, hook red and yellow wire from magnet together and hook positive (+) to them. Hook white and black wires together and connect to negative (-). You no longer have over voltage or over heat protection by will work fine. Put a low amp in line fuse on the positive side for protection if ever shorted out. It's like most Chinese products, they are 100% fully assembled "kits". Meaning you have to take them apart and rework them to make them function properly.

We purchased to 1200 pound maglocks and we installed them (1) worked but was very slow to operate (1) would not work. Contacted seller and they said they would send a new one out and I could return the bad one. Never received the replacement. Said it was lost in shipping. They never sent another one. The one that was working stopped after 2 weeks. Had to purchase two more from a different company.

Per there drawings and write up, it was to have a NO/NC switch, this unit only has 2 wires, positive and negative for power and when powered on, it draws just over 450ma's per my B&K power supply and it pulls the plate in from just over an 1/2 inch and I would say, one needs a crane to pull it apart. But it is not list correctly for sure. I gave 2 stars because of the holding force.

We replaced the existing front door mag lock with this item. It turned on and seemed to work, then left the store location. Within an hour we received calls the door wasn't working, so we went back to analyze the lock. The voltages on my control wire are good, but the device won't turn on. Internal electronics are all potted which makes it impossible to trouble shoot or see what's causing the issue. We weren't able to install the unit until we were outside the return window, so we're simply stuck.