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Sterling ProConnect Voltage Sensing Relay:

This solid state voltage sensitive relay (VSR) will connect two batteries together for charging whenever the voltage on one of the banks rises above the VSR's preset level. The combine voltage, which is programmable between 12.8 and 13.8 volts, can be user defined.  The ProConnect VSR's are bi-directional, and will activate when either battery is charging. You can also set the ProConnect for single bank excite sensing. In other words the ProConnect can be set to be either bi-direction or uni-directional. There is also an optional ignition trigger, which only allows the VSR to activate when the engine is running. The switch can be any type of switch and does not need to be only an ignition switch.

Since the ProConnect is solid state, resting current is only 1mA, and only slightly more than that when activated.

ProConnect VSR Typical Operation:

The VSR's parallel charging is activated by either the start or house battery as voltage increase from any charge source. The 2nd battery bank, once connected in parallel to the bank being charged, will disconnect or isolate the banks when the banks drop below 13.0V. The ProConnect is very simple in operation, it parallels/combines the banks when a bank is being charged and isolates the banks when no charging is occurring.

Voltage parameter Adjustments:

Voltage activation and deactivation parameters can be adjusted using the setup command. The ProConenct works with either 12V or 24V banks and will auto select the system voltage using the following;

• If it senses 4 to16V it will set itself for a 12V bank
  

• If it senses 16-30V it will set itself for a 24V bank 

If for some reason the input voltage is very low (in the case of an empty 24V system), then the product can be disconnected and allowed to re-engage, once locked the product will hold that setting until fully isolated again. The ProConnect VSR uses an algorithm to ensure that most banks can charge even where large differential voltages exist. The ProConenct uses time delays between what the turn ‘off’ voltage point is and the product actually turning off or uncombining. The algorithm is designed to help minimize relay cycling. With large house banks, connected to much smaller start banks, it is suggested that all charge sources feed the large bank first to help minimize any chance of relay cycling.

DC Voltage 12 & 24 auto 12 & 24 auto 12 & 24 auto Amps 80A 160A 240A Size (LxWxD) 140 x 80 x 40 mm 140 x 80 x 40 mm 140 x 80 x 40 mm Weight 0.22 lb (0.1 kg) 0.44 lb (0.2 kg) 0.55 lb (0.25 kg) Part Number VSR80 VSR160 VSR240