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Power Loss Sensor (PLS-1)

Reliably detect 120 VAC, single-phase power loss

Phason's Power Loss Sensor (PLS-1) works with the Local Environment Monitor (LEM) and OMNI-Site Watcher to continuously monitor single-phase, 120 VAC power.

The PLS-1 is designed to monitor the power for a single line. Using multiple PLS-1s, you can monitor additional circuits, zones, or rooms at your site. You can connect up to six PLS-1s to a single LEM.

Phason has a Phase Detection Sensor (PDS-1) available for detecting phase loss in three-phase systems.

How power loss detection works

The voltage-sensing relay has an adjustable dropout voltage of 90 to 103 V. When the voltage drops below the dropout value, the relay on the PLS-1 opens, signaling the Local Environment Monitor.

If the power stays off longer than the fault duration, the LEM signals the OMNI-4000 software that there is an alarm condition. If you have the OMNI-Alert alarm notification system installed and the alarm is set to active, OMNI-Alert dials the contacts on its call list and notifies them about the condition.

Features Easy installation in new or existing sites Voltage-sensing relay General-purpose relay Mounting rail and sockets 90-day limited warranty Electrical ratings Input: 120 VAC Dropout: 90 to 103 Pickup: 105 V

Additional information

• PLS-1 installation guide (PDF - 116K)
• PLS-1 feature sheet (PDF - 124K)
• PLS-1—part of your 'Risk management and livestock insurance strategy'
• Risk management and insurance solution for current OMNI users (PDF - 256K)
• Risk management and insurance solution for non-OMNI users (PDF - 250K)

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