The Verkada AC41 access controller comes with 5 removable cassettes, designed to make the installation and cabling process quick and easy.
Configure locking hardware
Fail-secure and fail-safe locks
Be aware of the different ways to configure locking hardware:
Fail-secure locks require electrical power to unlock. In their normal unpowered state, they remain locked. They use a Normally Open (NO) circuit. When power is interrupted, it remains locked.
Fail-safe locks require electrical power to remain locked. In their normal powered state, they remain locked. They use a Normally Closed (NC) circuit. When power is interrupted, it unlocks.
Dry vs wet setup
Dry—The AC41 does not provide power to the locking hardware (typically used with external power supplies).
Wet—The AC41 provides 12V or 24V power to the locking hardware.
Install the wires
Step 1: Remove the cassette
From the side tabs, lift the door cassette to remove it from the AC41.
Step 2: Connect the lock (APC—Dry Contact)
When using an access power controller (APC), which uses a dry contact, ensure that None is selected on the door power selection switch. The APC then detects if the AC41 relay is open or closed, and translates that to the lock. Maglocks, crash bars, and gates almost always a wired using an APC.
Step 3: Connect the lock (wet)
In a wet configuration, ensure that power selection for each door is set to the correct voltage, as outlined by the locking hardware specifications:
Set it to 12VDC for 12-volt locking hardware.
Set it to 24VDC for 24-volt locking hardware.
The AC41 is rated to power 12V locks up to 700mA and 24V locks up to 350mA.
Wet 12V / 24V NO-COM
If you have a fail-secure lock, connect to NO-COM where LOCK (+) positive goes into NO (fail secure) and LOCK (–) goes into COM.
Wet 12V / 24V NC-COM
If you have a fail-safe lock, connect to NC-COM where LOCK (+) positive goes into NC (fail-safe) and LOCK (–) goes into COM.
Step 4: Connect the reader
The AC41 is rated to power readers at 12V up to 250mA via the + (VIN) and – (GND) connection. Verkada readers use the far left 4-port inputs while standard Wiegand readers use the middle 6-port inputs.
The Verkada AD31 uses the following color scheme:
+ - Red
– - Black
A - Purple
B - Blue
The Verkada AD32 and AD33 uses the following color scheme:
+ - Red
– - Black
A - White
B - Green
Typical Wiegand wiring uses the following color scheme:
+ - Red
– - Black
D0 - Green
D1 - White
Step 5: Connect the inputs (optional)
DPI (Door Contact) (optional)
You can configure the REX to release the lock in Command (most commonly seen in maglocks) or simply show door forced open (DFO) events. You can also configure the REX unlock time.
REX motion sensors and REX buttons are often required by regulation to meet building codes for access-controlled entrance doors.
If necessary, you can utilize the 12V port for the unused reader to power the REX device.
Wet configuration with emergency REX button release
Dry configuration with emergency REX button release
Step 6: Insert the cassette
To finalize the installation, insert the cassette back into the desired slot on the AC41, then power the AC41 back on.
Visit the Verkada Training Center for bite-sized video tutorials on how to accomplish role-based tasks in Command.
Need help? Contact Verkada Support.