The PWR3 (Power 3) card is the central power distributor of the LB302/3 unit.. It connects the power supplies, electronic loads, 2 shunt resistors and the power rear module to the HC-bus (High-Current-bus) and LC-bus (Low-Current-bus). Additionally it is connected to the EL4x and/or EL01 card, which it can switch on both busses. The PWR3 card includes 2 separate shunts for current measurements up to 40A.
Please note: Works only in combination with a PWR3C and PWR3Z1 and/or PWR3Z2 card