LP1502 Door Controller (ADC-AC-LP1502) - Data Sheet
Notice: The Two Door Controller (ADC-ACC2-34) has been rebranded as the LP1502 Door Controller (ADC-AC-LP1502) to more accurately reflect the Mercury series of door controllers. All functionality remains the same.
Alarm.com’s Smarter Access Control is an ideal solution for any small or medium-sized business. Each LP1502 Door Controller can support up to two readers and can manage 34 readers using Alarm.com Expansion Modules. Designed for high-traffic business environments, the LP1502 Door Controller can manage large numbers of users with complicated access schedules.
For large installations, multiple controllers can be installed on a single account.

Controller features
- 12 to 24 VDC input power
- Two dedicated reader inputs
- Support for 16 expansion modules and up to 34 readers
- Four relay outputs
- Eight programmable inputs
Smarter Access Control benefits
- Scan-to-add card format and serial detection
- Control doors and manage users from the Alarm.com app
- Integrated Alarm.com intrusion and video offerings
- User-friendly, flexible scheduling
- Configure hardware using web or app for easy installation
- Plug & play installation — no networking expertise required
Specifications
| Input Power | 12 to 24 VDC, 500 mA max |
|---|---|
| Output Power | 300 mA max each reader |
| Inputs |
Two dedicated reader inputs One two-wire RS-485 input Eight programmable inputs One dedicated tamper input |
| Outputs |
Four relay outputs: 5 A (NO) and 3 A (NC) @ 30 VDC Single-wire LED control Single-wire Buzzer output |
| Certifications |
CE compliant UL 294 and UL 294B recognized RoHS FCC Part 15 Class A NIST certified encryption |
| Dimensions |
8 x 6 x 1 inches (203.2 x 152.4 x 25 mm) |
| Temperature |
32°F – 158°F (0 – 70°C) operational -67°F – 185°F (-55 – 85°C) storage |
| Operating Humidity | 5-95% (non-condensing) RH |

Developed with the Authentic Mercury open hardware platform