Allen-Bradley 509-EOD Brand Introduction Allen-Bradley 509-EOD is 509 series NEMA Size 4 full voltage non-reversing motor starter developed by Rockwell Automation for three-phase motor on-off discrete control. It specializes in connecting and cutting off power supply for heavy-duty large induction motors, serving as open-type direct-on-line contactor assembly for industrial motor control cabinets. Motor Starter is the core unit of Allen-Bradley 509-EOD. Motor Starter adopts open frame panel mounting structure for standard motor control enclosures. Motor Starter integrates eutectic alloy overload relay for motor overcurrent and overload protection. Motor Starter realizes start and stop control of field motors according to control circuit logic. Allen-Bradley 509-EOD provides stable Drive for workshop field heavy-duty motor load control. Drive supports max 600VAC operating voltage and 135A continuous rated current. Drive has reliable thermal overload protection function for motor overload and overheat protection. Drive features robust silver alloy contact for frequent heavy load start-stop operation. Allen-Bradley 509-EOD features reliable Transmission for control circuit and field motor devices. Transmission communicates via control wiring loop. Transmission is fully compatible with low voltage motor control systems and auxiliary control components. Transmission delivers fast switching signals to field heavy-duty motor loads. Allen-Bradley 509-EOD is widely used in large conveyor, fan pump, machine tool and legacy heavy motor control system renovation. With mature Rockwell low voltage starter technology, this motor starter works within temperature range 0~40℃ and has strong anti-vibration performance. It provides full lifecycle technical support including wiring, commissioning and after-sales maintenance, serving global users as a trusted NEMA Size4 full voltage motor starter solution.