Alarm Panel Integration

The Everything Presence Pro includes a solid-state relay output with screw terminals, making it easy to integrate with traditional alarm panels and security systems.

Relay Specifications

Specification	Value
Type	Solid-state relay
Configuration	Normally Open (NO) by default. Normally Closed (NC) also available — configurable in Home Assistant via the Relay Contact Type select entity.
Terminals	Screw terminal block

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Basic Connection

There are a few different ways that the EP Pro can interface to an alarm panel. The interface method is determined by the alarm panel; some panels can support more than one method so it's important to consult the alarm panel documentation.

There are 2 main methods that are common in the vast majority of panels on the market, these are:

Closed Circuit Loop (CCL)

With the CCL method each circuit needs 2 cable cores. Two for the alarm circuit, 2 for the tamper circuit as well as 2 for the power supply (if needed).

Fully Supervised Loop (FSL)

With the FSL method only 2 cores, plus some suitable resistors are needed. Again 2 cores will be required for the power supply if needed. The resistor values are determined by the alarm panel.

As mentioned above, some panels support both methods. Given the option, users should choose FSL where possible as it is a more secure method.

Alarm panels that support FSL connection essentially measure the resistance of the loop to determine its status.

Consider the diagram to the right. The control panel will measure the following resistance values and can thus differentiate the type of alarm.

Healthy / No Alarm – 2K2

Alarm – 6K9 (2K2 + 4K7)

Tamper – Infinity

Important

Only 1 EOL resistor is needed per loop even if there are 2 or more detectors on a single loop.

As the name suggests, the EOL resistor must be fitted at the remote end of the loop. If the EOL resistor is fitted at the panel end, the loop will still function but the system can be easily defeated.

More details coming soon

Wiring Diagrams

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Configuring the Relay

Trigger Modes

In Home Assistant, find the Relay Trigger Mode select entity to configure automatic triggering:

Mode	Behaviour
Disabled	Relay only responds to manual control
Motion Only	Relay activates when PIR detects motion
Presence Only	Relay activates when occupancy is detected
Motion or Presence	Relay activates on either trigger

Manual Control

The Relay Output switch entity allows manual on/off control, useful for:

Testing the connection
Custom automations
Overriding automatic behaviour

Troubleshooting

Relay Not Activating

Check Relay Trigger Mode is not set to "Disabled"
Verify presence/motion is being detected (check binary sensors)
Test with manual control via Relay Output switch
Check wiring connections at screw terminals

False Alarms

Reduce detection sensitivity
Add exclusion zones for problem areas
Increase timeout values
Consider using "Presence Only" mode instead of "Motion"

Alarm Panel Not Seeing Zone

Verify wiring polarity
Check EOL resistor if required
Test relay with multimeter (should show continuity when activated)
Ensure alarm zone is properly programmed

Using Home Assistant Automations Instead

For more flexibility, you can bypass the built-in relay trigger modes and use Home Assistant automations:

automation:
  - alias: "Pro to Alarm Panel"
    trigger:
      - platform: state
        entity_id: binary_sensor.pro_occupancy
        to: "on"
    condition:
      - condition: state
        entity_id: alarm_control_panel.home_alarm
        state: "armed_away"
    action:
      - service: switch.turn_on
        target:
          entity_id: switch.pro_relay_output

This gives you control over:

Which sensors trigger the relay
Time-based conditions
Alarm state awareness
Custom delays and logic