Eaton PRC-E Series Instruction Manual

Contents

5Field wiring terminationPRC-E Series Instruction Manual MN014003EN August 2015 www.eaton.comField wiring terminationThe following topics discuss the necessary and optionalwiring connections between the PRC-E Series controllers,BCB devices, and termination of the field devices, whichcan consist of switches, occupancy sensors, and light levelsensors. The following discussion breaks the wiring intological topics such as power, circuit breaker control, andfield devices.Figure 7 PRC-E Series WiringPower SupplyThe PRC-E Series electronics uses 30 Vac/Vdc controlpower. From this 30 V supply, all needed control voltagesare generated internally. The integrated PRC-E Seriescontrollers include a 30 Vac supply transformer that isconnected to the line-to-line voltage of the panelboard(208/240/480 Vac). The PRC-E Series external controllerenclosures include a 30 Vac supply transformer that isconnected to the line to neutral of the panelboard (120/277Vac). The connection to the controller transformer dependson the type of enclosure and is discussed separately below.Panelboard control chassisThe PRC-E Series Master Panelboard is shipped with anintegral controller, which is pre-wired to the correct supplyvoltage for the panelboard rating.There is no need for the personnel installing the panelboardto supply connections to the power supply of the integralcontroller chassis.PRC-EControllerBCBBCBSLANBCB