HB4735 is a PLC-5 Relay Output (RO) Block from Allen-Bradley. It is used to control low-voltage, electrically latched outputs with a PLC-5 processor. The HB4735 has eight relay contacts, five of which are user-configurable as either normally open or normally closed, and three of which are pre-configured as normally open contacts. With a power rating of 10A, the HB4735 is capable of controlling industrial equipment, such as lamps, motors, or valves, in a variety of application environments. It is a cost-effective solution for controlling small equipment while providing the suitable environment for reliable operation.