System Voltage Caution

Historically, the tether voltage to power the ROV has been increasing. Economy models (including the Scout, Explorer and Voyager), Pro 3 variants and the Pro 4 Ultra use 48 V DC for vehicle power. The Pro 4 uses 74 V DC. The MSS (Mission Specialist Series) uses 400 V DC with plans to use higher voltages in the future. Systems with voltages higher than 48 V DC include a LIM (Line Insulation Monitor) protection module in the ROV DC circuit.

System components should not be connected to voltage sources higher than their rating.

The Pro 4 Ultra uses the same ROV as the Pro 4 and is rated at 36 V DC to 74 V DC input. The power supply for the Pro 4 Ultra is limited to 48 V DC maximum output. The Pro 4 Ultra ROV is safe to use on a standard Pro 4 control panel.

Systems with voltage requirements or capabilities higher than 74 V DC use red tether locking collars. These red collars indicate the component is rated for more than 600 V DC and is safe to use at more than 74 V DC.

Components with black locking collars (other than tether - see note below) should not be used with power components that have red locking collars.

VideoRay Negative, Neutral and PPT tethers are rated to 600 V DC and are safe to use on any system through the MSS 400 V DC. These tethers have traditionally used the black locking collars.

The standard TDS and Extended TDS are only rated to 300 V DC and should not be used with MSS power components that have red locking collars.