EN1113x3301 Upgradeable Basic Enpowered PDUs 32A 1ph. A blanking plate covers the space where the intelligent monitoring card can be added at a later date to upgade the PDU to one with EN1000 series metering functionality. See our range of PDU accessories for additional sensors (access/security, humidity/temperature, smoke and water/fluid), beacons, communications cables, plug-in interfaces and locking power cords.