The Allen-Bradley 1756-N2XT by Rockwell Automation is a ControlLogix slot filler module. With RS-232, RS-422, RS-485 communications, and a SERCOS data rate of 4 or 8 Megabits-Second, it preserves backplane integrity and system continuity in empty slots, drawing 1.2 amps with a power dissipation of 6.2 Watts. Manufacturer Rockwell Automation Brand Allen-Bradley Part Number/Catalog No. 1756-N2XT Series ControlLogix Module Type Slot Filler Module Function Slot Filler Communications RS-232, RS-422, RS-485 Backplane Current (5Volts) 800 milliamps Backplane Current (24Volts) 3 milliamps Power Dissipation 6.2 Watts SERCOS Data Rate 4 or 8 Megabits-Second Current Draw (5.1 Volts) 1.2 amps Thermal Dissipation 21.2 BTU-hour Isolation Voltage 50 Volts Continuous Enclosure None