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[Solved] EXTERNAL POWER FOR TOPCON GTS-825 ROBOT

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Last Post by Tim 4 months ago

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Tim

(@tim)

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Hello, can anyone advise me if a 12V car battery can be used as external power source on this total station? Thanks! (appologies if I am posting this in the wrong format/location)

Posted : June 14, 2026 2:06 pm

Landbutcher464MHz

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According to Google AI:

The maximum recommended external power voltage for the Topcon GTS-820A series (which includes the robotic GTS-825) is 12 V DC. Attempting to use a voltage exceeding this limit can cause permanent damage to the total station’s internal electronics. [1, 2]

Critical Power Specifications:

Nominal Voltage: 7.2 to 12 V DC is the standard accepted range for external batteries and cables on this series. [1, 2]
Power Connection: Typically achieved using a specialized interface cable that connects an external 12 V deep-cycle or brick battery (often via SAE or alligator clips) to the instrument's multi-pin external data/power port. [1, 2]
Safety Precaution: Only use manufacturer-approved cables (such as the Topcon EDC117 or equivalent) to prevent accidental voltage spikes or reversed polarity.

Posted : June 14, 2026 6:30 pm

Tim

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@landbutcher464mhz thanks, I appreciate your help!

Posted : June 15, 2026 10:00 am

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