The Verkada Intercom (TD52) provides a Power over Ethernet (POE) port to enable communication with your Verkada Command dashboard and 3 input/output (I/O) ports.
How to wire the TD52 into your network
The TD52 requires a POE/POE+ enabled switch port.
Power: 11.5W (IEEE 802.3af PoE)
Extended Temperature Range: 25.5W (IEEE 802.3at PoE)
The back of the TD52 has an I/O cover secured by 4 screws that hold the I/O cover in place.
Remove these screws using a #2 Phillips head.
2. Plug the the Ethernet cable to provide power to the intercom.
The intercom should power on and the status LEDs display on the face of the intercom. Read about what each LED status indicates.
How to wire I/O port
The TD52 provides space in the I/O port for 2 inputs and 1 output.
Input device options | Output device options |
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Example: I/O ports when the cover is removed
Each I/O port corresponds to the following pins from left to right:
To simplify the I/O port wiring, remove the I/O terminal: you can use a screwdriver provided in the box or any tool that allows you to lever the terminal away from the device.
Example: Use Torx security screwdriver to pull the terminal away from the TD52
How to wire an input device
Looking at the I/O terminal, the 3 ports closest to the right are for inputs:
IN2 (Pin 10)
IN1 (Pin 9)
GND (Pin 8)
Choose which port(s) the input(s) to wired into.
Note the number input; this corresponds to an input number in Intercom settings. For example, a DPI wired into IN1 / Pin 9 and a REX wired into IN2 / Pin 10.
Press and hold the orange push button to insert the second wire of input device into ground (Pin 8 / GND).
You can use the same ground port when 2 inputs are installed.
The example below is an intercom I/O terminal with 2 input devices attached, both of them using the same ground port.
Example wiring scenarios
REX / Call Trigger
Door Contact / DPI
Note: When wiring an intercom as an access controller, you must wire the REX into Input 2 (IN2) and DPI into Input 1 (IN1).
Power your input device using an external power supply
To wire using an external power supply, take the positive (+) and negative (-) from the input device and then wire it into the power source.
The following example hows how to wire a powered REX / call trigger into an external power supply:
How to wire an output
Looking at the I/O board, the 3 ports closest to the left:
NO (Pin 1)
COM (Pin 2)
NC (Pin 3)
Using the orange push button on the terminal block, insert the negative wire (–) into COM (Pin 2).
This wire will be inserted into the ground (GND) or negative (–) on your output device.Determine what relay state the output device requires to be triggered, then use the orange push button to insert the second wire into either NO or NC.
If the output device expects NO, then put the '+' wire into NO / Pin 1.
If the output device expects NC, then put the '+' wire into NC / Pin 2.
This wire will be inserted into the input (IN) or positive (+) on your output device.
Select the appropriate output setting for the output in the Verkada Command dashboard.
Note: The TD52 uses a dry relay, which means that it cannot power an output device. All output devices that require power need to use an external power controller or power supply.
How to wire a reader
Example wiring scenarios
Door unlock
The door unlock allows for the output relay to trigger when an unlock is sent from the receiver. In both wiring scenarios, the lock is attached to an access power controller.
Wiring using a fail secure lock
Wiring using a fail safe lock
