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Using a UPS battery backup for SLR5700 Repeater

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motobot213

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I have a SLR5700 UHF repeater outputting 10 watts. I need a battery backup for the unit. Im looking to get a good UPS for the repeater but need it to run for about 5 Hrs at least on about 40% transmission. Can anyone recommend which one is best to use? Thanks
 

Firebuff880

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HI

I have a SLR5700 UHF repeater outputting 10 watts. I need a battery backup for the unit. Im looking to get a good UPS for the repeater but need it to run for about 5 Hrs at least on about 40% transmission. Can anyone recommend which one is best to use? Thanks
As @cmdrwill said this repeater will run off DC with a charging circuit. Also most UPS vendors, if you prefer to go that route have a calculator on their website. Lastly, if you are doing anything other than straight repeating Rembert to factor in your rest channel becon.

https://www.backupbatterypower.com/pages/ups-run-time-calculator

Specs indicate input DC 11.0 - 14.4 VDC
current transmitting 9.5A
current standby 0.7A

https://tinyurl.com/y7hrqcd9
 

N4DES

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Dec 19, 2002
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You are asking for two different animals in your original post. A UPS is a lot less efficient than a battery backup and you would need to properly calculate the AH for the battery based on your needs of 5 hours @ 10 watts.

I have a 100AH battery for my HOA's single channel repeater system that runs for days with a usage of around 20% daily usage at I think is also 10 watts TPO.
 

cmdrwill

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As @cmdrwill said this repeater will run off DC with a charging circuit. /QUOTE]

The repeater has a battery revert circuit that switches to battery power when AC power goes away. And charges the battery when AC power returns. So all you need is the cable and battery.

From the installation manual:

Molex 42818 – 0212 connector: DC Power Inlet and DC Charger Outlet. PMKN4167 Battery Charger Cable

• Battery Revert – should the AC source be interrupted, this function allows the power supply to
seamlessly transfer to a DC source until the AC source is restored. This results in uninterrupted
radio service for as long as DC power can be provided.
Note A user supplied external 12 V (nominal) battery system is required to support the battery
backup feature so that when the AC power fails, the SLR 5000 series repeater is powered from a
DC battery source if it is connected to the PS.
 
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