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Converting -48 VDC Power to +12v AND +24v

If you have remote sites powered by -48 VDC battery plants, you know it's difficult to deploy devices that don't natively support that voltage. Remote sensors, for example, most commonly require +12 VDC or +24 VDC.

Don't rely on flimsy AC adaptors and commercial power for the equipment at your site. Use your existing -48 VDC power plant to power your +12 and +24V equipment.

With this 1 RU power supply box, you can convert -48 VDC power into 6 ports of +12 VDC and 6 ports of +24 VDC. There's a separate fuse for both inputs and one for every two outputs, ensuring that if a fuse blows, it won't interrupt the function of other equipment connected to the power supply.

12/24 Power Supply
12/24 Power Supply back panel with 6 +12V outputs and 6 +24V outputs.

This is great for sites where you need to power remote sensors, but you don't have an RTU like the NetGuardian 832A G5 that has built-in sensor power (optional).

But what good is power if it's not reliable? The 12/24 Power Supply has dual-redundant -48 VDC power inputs for extra reliability. Also, each pair of power outputs is separately fused, limiting the number of attached devices that lose power should you blow a fuse. All six output fuses are easily accessible from the front panel.

The unit's dual power inputs ensure you won't have to worry about a power failure knocking out your site's sensors. If a single -48 VDC power source fails, your equipment connected to the 12/24 Power Supply won't.

Front panel of the 12/24 Power Supply
Front panel of the 12/24 Power Supply with Power Output Fuses

While you're delivering power to remote site sensors and other equipment, you may also decide that you'd like better network visibility as well. That's where the 12/24 Power Supply becomes versatile with a 16-point RTU option. If you select this model, your Power Supply will come equipped with 16 discrete alarm inputs, 2 analog inputs, and 2 control relays.

The maximum total current draw for the 12/24 Power Supply is 5 amps, with a maximum of 1 amp on any pair of outputs.

Even with 12 power outputs (6 at +12v, 6 at +24v) and an optional 16-point RTU, the 12/24 Power Supply requires just 1 RU of physical rack space.

Note:The 12/24 Power Supply is intended for use only with devices that isolate their power inputs from chassis ground or earth ground.


The Benefits of Using the 12/24 Power Supply

  • Use your analog sensors and other, lower power equipment on -48 VDC

  • Available in +12V only model or with both +12V and +24V outputs, to fit your needs

  • Works in common or isolated bonding networks

  • Optional fuse alarm relay can be used to set an alarm if a fuse blows, providing remote visibility on your power supply

  • Fuse alarm LEDs visibly alert you to power problems

  • Easily accessible fuses allow for quick setup and repair if you ever blow a fuse

  • Rack or wall mountable fits in-line with your equipment


Full Specifications

Dimensions: 1.7"H x 17.0"W x 7.1"D.

Weight: 3 lbs.

Mounting: 19" or 23" rack or wall mount.

Power Input: -48 VDC.

Current Draw: 5 Amps max.

Fuses: 5 Amp GMT for power input.

1 Amp for +12 or +24V power output.

Visual Interface: 8 Front Panel LEDs.

3 Back Panel LEDs.

Operating Temperature: 32 to 140 degrees F (0 to 60 degrees C).

Operating Humidity:0%-95% noncondensing.

RoHS 5 Approved 5/6.


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  • To continue using functioning legacy gear in the era of modern protocols, you need a modern master that remains compatible with older protocols as well. T/Mon supports legacy devices and protocols from Badger, Cordell, Granger, Larse, NEC, Pulsecom, and Teltrac.

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  • T/Mon offers you flexible capacity. You shouldn't pay for what you won't use. Whether you're a small rural telco or a massive multinational corporation, you can choose a T/Mon platform that's scaled for your needs. You can also choose software modules based on the protocols you use in your network.


To receive a price quote or ROI analysis call 1-800-693-0351

Get the Perfect Fit Solution for Monitoring Your Remote Site Equipment

Your network has unique monitoring needs that won't be met by a standardized device with inflexible and limited capabilities. Some of your sites may need heavy discrete alarm coverage. At other sites, you may need to monitor electrical and environmental inputs with live analog values. Or you may need to ping IP devices to verify they're operational and online.

There are also some other considerations when selecting monitoring devices - protocol support, transport interface, control relays, and capacity.

No matter what monitoring tasks you need to perform, DPS Telecom supplies the tools to do the job right. We offer a wide selection of RTUs, each designed to meet your specific monitoring needs with a perfect fit solution. It's easy to find an RTU that's a perfect match for your network.

DPS Telecom can help you determine your total monitoring needs. Based on our experience creating thousands of monitoring applications for real-world remote sites, our application engineers will develop a comprehensive solution for your network using our detailed, step-by-step site survey. If you want help determining your site needs, please give us a call at 1-800-693-0351.

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