Honeywell 10303/1/1-The Power Supply Distribution Module (PSD) 10303/1/1 is intended for use in non-redundant I/O topologies and redundant Central Parts. For the non-redundant I/O in the system, it aggregate the outputs of redundant power supply units (PSUs) into a single 5 Vdc supply.The module measures 2.5 x 12.7 x 20.3 cm and weighs 0.2 kg