Crystal 24VDC Loop Power Supply User Manual
Page 2
Output Terminals:
24 VDC output. Observe correct polarity.
On Key:
Press to turn power on when connected to loop.
Must be connected to a load for On Key to function.
LED signals:
On when loop is powered.
On when batteries are nearing depletion.
To avoid damage to rechargeable batteries, remove
when this LED is illuminated. Refer to the Approximate
Battery Life table on page 2 for battery life estimations.
On when unable to maintain 24V output.
A depleted battery, short circuit, or low loop impedance will
cause this LED to illuminate.
24VDC Loop Power Supply Operation Manual
1
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INTRODUCTION
The 24VDC Loop Power Supply (24VDCPS) is a portable, battery-powered, loop power supply and is ideal for sites where power is unavailable. The low noise
regulated output is suitable for use with smart transmitters. Power is automatically turned off when load is removed, preserving battery life. Outputs feature
short circuit protection. Three LEDs indicate power, low battery, and fault status. A protective boot and two AA batteries are included.
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QUICKSTART/OPERATION DIAGRAM
Auto-Off & Power Hold Function
When the loop is connected, press the On key to enable the output voltage. The 24VDCPS does not have an Off switch. When testing is complete, simply
disconnect the loop and the unit will turn off automatically. If the loop is re-connected within approximately 30 seconds, the unit will power on automatically.