Parallel OperationIntroductionMaster/Slave OperationIndependent Parallel Operation - RP795xA, RP796xAIntroductionSHOCK HAZARD All paralleled units must be connected to qround through a groundedpower cord at all times. Any interruption of the protective (grounding) conductor ordisconnection of the protective earth terminal on any unit will cause a potential shockhazard that could result in injury or death.To Prevent Possible Equipment Damage:l Connect no more than twenty units of identical voltage ratings. All units must havethe same voltage rating but current ratings can be different. All units must have thesame version firmware installed. Refer to Instrument Identification for details.l Always turn the AC power on and off together. Never leave any units powered onwhile the others are turned off.l For models RP795xA and RP796xA, always connect the negative output terminalsof all paralleled units together to prevent damaging the Sharing bus.Parallel operation lets you connect multiple power supplies together to create a system with highertotal current and power. This applies for current sourcing as well as current sinking operation. Refer toMultiple Unit Connections for detailed information on how to connect the outputs and themaster/slave cables. Remember to also set the termination switches.Units of dissimilar power ratings may be paralleled, provided they have identical voltage ratings. Inthis case, the units will share current proportionally according to their current rating. For example, a10 kW unit rated at 40 A and a 5 kW unit rated at 20 A will share their output current in a 2-to-1 ratio.Models RP795xA, RP796xA also require connecting the Sharing cable asdescribed under Sharing Connections.Two modes of parallel operation are available:Master/Slave operation - In this mode, the paralleled group is controlled through the master unit,and appears as a single higher-power supply. The master unit provides the aggregate of most sourceand measurement functions. The current sharing function is automatically enabled duringmaster/slave operation. This is the recommended method of paralleling units.Independent parallel operation for Models RP795xA, RP796xA - In this mode allparalleled units are programmed independently. Connect and program the output On Couple and4 Using the Regenerative Power System110 Keysight RP7900 Series Operating and Service Guide
