The Verkada Intercom (TD52) provides a POE port to enable communication with your Command dashboard as well as three I/O ports.

This article covers the following topics:

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 that is secured by four screws. The four screws can be removed by a #2 Phillips head. Here is an image of the I/O cover highlighting which screws hold the I/O shield in place:

Once the Ethernet cable is plugged in to provide power to the Intercom then the Intercom should begin powering on. Once plugged in then status LEDs will be displayed on the face of the Intercom.

Read here for more information on what each LED status means.

How to Wire I/O

The TD52 provides space in the I/O port for two inputs and one output.

Input device options:

  • Call triggers

  • DPI (Door Position Indicator)

  • REX (Request to Exit)

Output device options:

  • Door unlocks

  • Chime

  • Call in progress

This is what the I/O ports look like when the cover is removed:

Each I/O port corresponds to the following pins from left to right:

NOTE: Verkada readers are not currently supported on the TD52 and as such pins 5 and 6 do nothing at this time.

To make wiring into the I/O ports easier you can remove the I/O terminal. To remove the I/O terminal you can use a screw driver provided in the box or any tool that allows you to lever the terminal away from the device.

Shown below, the torx security screw driver can be used to pull the terminal away from the Intercom.

How to Wire an Input Device

  1. Looking at the I/O terminal the three ports closest to the right are for inputs:

    1. IN2 (Pin 10)

    2. IN1 (Pin 9)

    3. GND (Pin 8)

  2. Choose which port(s) the input(s) will be wired into

    1. Note the number input that is being used as this will correspond to an input number in Intercom settings.

    2. for example, a DPI wired into IN1 / Pin 9 and a REX wired into IN2 / Pin 10

  3. Press and hold orange push button to insert second wire of input device into ground (Pin 8 / GND)

    1. the same ground port can be used when two inputs are installed.

    2. Shown here is an Intercom I/O terminal with two input devices attached, both of them are using the same ground port.

Example wiring scenarios

REX (request to exit) / Call Trigger

Door Contact / DPI

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.

Shown here is an example of how to wire to wire a powered REX / call trigger into an external power supply:

How to Wire an Output

  1. Looking at the I/O board the three ports closest to the left:

    1. NO (Pin 1)

    2. COM (Pin 2)

    3. NC (Pin 3)

  2. Using the orange push button on the terminal block insert the negative wire (-) into COM

    1. this wire will be inserted into the ground (GND) or negative (-) on your output device

  3. Determine what relay state the output device requires to be triggered then use the orange push button and insert the second wire into either NO or NC.

    1. If the output device expects NO then put the '+' wire into NO / Pin 1.

    2. If the output device expects NC then put the '+' wire into NC / Pin 2.

    3. This wire will be inserted into the input (IN) or positive (+) on on your output device.

  4. Select the appropriate output setting for the output in the Command dashboard

NOTE: the TD52 uses a dry relay meaning that it cannot power an output device. All output devices that require power will need to use an external power controller or power supply.

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

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