LP1501 Service Bulletin 01/06/2023
Reader Noise and HID® Mercury™ Wiegand Behavior Technical Bulletin Jan. 2023
A combination of readers and cables connected to Wiegand inputs on certain HID Mercury LP1501 controllers can result in invalid card reads. This technical bulletin documents the details of this system failure and potential in-field workarounds.
Readers and cables producing a substantial negative voltage output, in certain instances, are causing invalid card reads on certain LP1501 controllers.
After testing with a variety of readers and cables across all HID Mercury controller models, the issue was observed on the following readers when connected over Wiegand wire runs of roughly 30m and greater:
- Schlage MT15
- Schlage MTK15
- Morpho Sigma WR
Click here to download Reader Noise and HID Mercury Wiegand BehaviourTechnical Bulletin.
