Access Control locking hardware wiring guide
General
The Alarm.com Access Control hardware provides Form-C contact relays to control the door lock mechanisms or alarm signaling devices. These relay contacts have different power ratings based on the hardware and relay terminals being used.
ADC-ACC1-17:
- 1-C - 2A @ 30VDC
- 2-C - 2A @ 30VDC
ADC-AC-LP1501:
- 1-C - 2A @ 30VDC
- 2-C - 2A @ 30VDC
ADC-AC-LP1502:
- Out 1 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Out 2 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Out 3 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Out 4 - 5 A (NO) and 3 A (NC) @ 30 VDC
ADC-ACX1/ADC-AC-MR50:
- K1 - 5A @ 28VDC
- K2 - 1A @ 28VDC
ADC-ACX2/ADC-AC-MR52:
- RLY1-C - 5A @ 28VDC
- RLY2-C - 5A @ 28VDC
- RLY3-C - 5A @ 28VDC
- RLY4-C - 5A @ 28VDC
- RLY5-C - 5A @ 28VDC
- RLY6-C - 5A @ 28VDC
ADC-AC-X1100:
- Relay 1 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Relay 2 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Relay 3 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Relay 4 - 5 A (NO) and 3 A (NC) @ 30 VDC
ADC-AC-X100:
- Relay 1 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Relay 2 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Relay 3 - 5 A (NO) and 3 A (NC) @ 30 VDC
- Relay 4 - 5 A (NO) and 3 A (NC) @ 30 VDC
When using locking hardware, Alarm.com always recommends checking with the customer's local building codes when physically installing or mounting locking hardware for proper egress door installation.
Note: It is recommended to use an 18/2 wire gauge when making wiring selection for the locking hardware as it is the industry standard for locking/relay wire. Cat5/Cat6 is not recommended as it is not intended to be used for this application.
Door strike
An electrified door strike replaces a traditional door strike for an Access Control system. Door strikes are predominantly Fail-Secure devices, meaning the door remains secure in the event power is removed. This hardware should be wired as Normally Open using an NO terminal as indicated on Fail-Secure wiring diagram below. This is because entry through the door is only granted when the controller is signaled to close the circuit which energizes the strike and allows entry.
Door lock mechanisms can generate EMF feedback to the relay circuit that can cause damage and premature failure of the relay. For this reason, it is recommended that either a diode or MOV (metal oxide varistor) be used to protect the relay. The wire should be of sufficient gauge to avoid voltage loss.
Diode Selection:
- Diode current rating: 1x strike current
- Diode breakdown voltage: 4x strike voltage
- For 12 VDC or 24 VDC strike, diode 1N4002 (24 VDC) is typical
Note: This configuration is pre-wired, allowing for simpler relay configuration selection.
For information about whether a fuse is recommended or required and the type of fuse that should be used, refer to the lock installation guide or contact the lock manufacturer.
Maglock
An electromagnetic lock or maglock is a is an electromagnet which mounts on a door frame, with a steel armature mounted on the door. Maglocks are Fail-Safe only devices. This means that when power is removed or in the event of a fire alarm input (FAI) signal the maglock unlocks the door as required by code. This hardware should be wired as Normally Closed using an NC terminal as indicated on the Fail-Safe diagram below. This is because constant flowing power is required to keep the maglock energized to secure the door.
MOV Selection:
- Clamp voltage: 1.5x VAC RMS
- Use UL recognized MOV with appropriate ratings
Note: This configuration is pre-wired, allowing for simpler relay configuration selection.