REVBC-100-C1-US Revolectrix BUMP Control Unit Manual

• The BUMP Controller must always have a common power ground (negative) connection to all

connected PowerLab Battery Workstations. If the common ground connection between BUMP

Controller and PowerLabs does not exist at the instant when the positive power wire is

connected, excessive current may flow through the PowerLab port(s) and damage the BUMP

Controller and/or PowerLab(s).

• Since the positive pin of the EC-5 input power connector may touch a split-second before the

negative pin, this ground-fault problem can occur even when just plugging in the EC-5

connection to the BUMP Controller.

• To avoid this risk, make sure you always interconnect the BUMP Controller and PowerLab

power cables first (typically using Y-cables), then apply power to that common cable - this

ensures the BUMP Controller and PowerLabs always have a common ground connection at the

instant the positive connection is made and current starts flowing through the system.

• The BUMP Controller and its connected PowerLab(s) can use separate power supplies,

however, all of those power supplies must share a common ground connection which is capable

of handling high current loads, and that ground connection must remain connected as long as

any one of the power supplies is active. It's okay to turn on one power supply (and PowerLab) at

a time, as long as all of the ground connections remain interconnected.

• Finally, whenever possible, and at least the first time you connect up system components, it is

also recommended that the BUMP Controller and any/all PowerLabs are powered up and

running prior to connecting the PL ports (labeled P1-P4 on the back of the BUMP Controller) to

the PowerLab data ports (on the back of each PowerLab) using the supplied JR style male-to-

male extensions. After the BUMP Controller boots up, you will then see a graphic on the BUMP

Controller display which illustrates the proper polarity for these interface cables when plugging

them into the BUMP Controller PL ports. Always ensure you make PL port interconnections at

the BUMP Controller using proper polarity (black/ground wire to the right when viewed from

above). Proper polarity for each PowerLab data port side of the cable (listed as “TO PC”) is

illustrated on every PowerLab top panel label and varies from model-to-model.