Introduction: AT-UHD-SW-510W/AT-OME-MS52W Trigger I/O

The AT-UHD-SW-510W/AT-OME-MS52W supports both active output and passive output sensors. You can also power your sensor using the 510W/MS52W, 12 V, P output. Trigger I/O is intended for occupancy sensors, but this port can be utilized to trigger display and screen control by any device with the appropriate specifications.

To power your sensor with the 510W/MS52W, your sensor must support 12 V DC power and draw < 100mA.

Active Output Sensors

Your sensor outputs a voltage when triggered.
Sensors with powered outputs must output between 3 and 30 VDC.

Passive Output Sensors

Your sensor shorts its outputs together when triggered.
Sensors with passive outputs will require a bridge between the ground and - terminals of your Trigger I/O port.

The AT-UHD-SW-510W/AT-OME-MS52W Assumes Room Occupied When Triggered

When occupied you can configure the screen relay to extend your screen and the display ON command to be sent
When not occupied you can configure the screen relay to retract your screen and the display OFF command to be sent

Wiring Active Output Sensors

Sensor Powered Externally

Ensure your sensor outputs 3 - 30 V DC when triggered

Make the following connections:
- Trigger I/O - to the ground or common of your sensor
- Trigger I/O + to the sensor positive output terminal
- Connect your sensor's external power supply

Sensor Powered by 510W

Ensure your sensor outputs 3 - 30 V DC when triggered

Make the following connections:
- Trigger I/O - to the ground or common of your sensor
- Trigger I/O + to the sensor positive output terminal
- Trigger I/O P to the sensor 12V power input
- Trigger I/O ⏚ to the sensor ground

Wiring Passive Output Sensors

Sensor Powered Externally

Ensure your sensor supports a 12V trigger signal input

Make the following connections:
- Trigger I/O - to Trigger I/O ⏚
- Trigger I/O + to the sensor terminal
- Trigger I/O P to the other sensor terminal
- Connect your sensor's external power supply

Current @ 12V will come from the P terminal and sink into the + terminal when the sensor is triggered
- Only 1-2 mA will flow.

Sensor Powered by 510W

Ensure your sensor supports a 12V trigger signal input

Make the following connections:
- Trigger I/O - to Trigger I/O ⏚
- Trigger I/O ⏚ to the sensor ground
- Trigger I/O + to the first sensor terminal
- Trigger I/O P to the second sensor terminal

Current @ 12V will come from the P terminal and sink into the + terminal when the sensor is triggered
- Only 1-2 mA will flow.

Occupancy Sensor / Trigger I/O Web UI Setup

To use your Trigger I/O port for display and screen control, you must select the Display Control Method "Active Video Presence w/ Occupancy Sensor" or "Occupancy Sensor" in the Display menu:

For screen control options, scroll to the Relay settings. See this article for more information on screen control.

Troubleshooting Trigger I/O

No 12 V on the P Output
- Make sure there are no shorts in your wiring from P to ⏚ or from P to -.
- Shutdown your AT-UHD-SW-510W from the web interface then pull its power cord for 5 seconds.
  - The P output is protected with a fuse that will reset when power is removed.

Trigger I/O Does Not Trigger
- If using the "Active Video Presence w/ Occupancy Sensor" Display Control Method, make sure you have an active video source connected to the 510W.
- Check your sensor wiring and use a multimeter to confirm your sensor is outputting an active or passive trigger signal.

Trigger I/O Is Always Triggered
- Check your sensor wiring and use a multimeter to confirm your sensor is outputting an active or passive trigger signal.
- The passive signal connection at the 510W is high impedance. It only takes 1-2 mA to trigger, so make sure there are no shorts in your cable.

Article ID: KB01664