Digital security keypads connect to alarm panels via RS-485 4-wire or 2-wire buses for PIN code entry remote arming and disarming and status display using proprietary panel protocols from DSC Honeywell or Bosch.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | VCC | 12V supply from panel | PWR |
| 2 | GND | Ground | GND |
| 3 | DATA+ | RS-485 data positive | BUS |
| 4 | DATA- | RS-485 data negative | BUS |
Digital security keypads connect to alarm panels via RS-485 4-wire or 2-wire buses for PIN code entry remote arming and disarming and status display using proprietary panel protocols from DSC Honeywell or Bosch.