1747-L20D

The Allen Bradley 1747-L20D is a version of SLC 500 Fixed Hardware Style module equipped with a power supply and a fixed number of I/O contained in one package. The memory type of this module is Capacitor-backed RAM memory; it has a processor with an instruction capacity of 1,024 (1K), operating at a frequency of 47 to 63 Hertz. Its (12) 24 Volts DC (sink) inputs, 8 AC triac outputs, and high-speed counter provide flexibility and power for operations.A Belden 9463 cable should be used to connect this module, with the 6-Pin Phoenix Connector. The Battery life of this module is 5 years. It has a relative humidity range of 5% to 95% without condensation. Its operating temperature from 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit) with a storage temperature of -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit). Its weight and size are around 0.37 pounds (168 grams) and 5.72 x 1.37 x 5.15 inches (145.28 x 34.79 x 130.81 millimeters), making it relatively lightweight.

This module should not be exposed to unfiltered outside air; exposure to external environments may introduce harmful contaminants that can cause damage to the component.

The 1747-L20D has Typical Scan Time of 8 milliseconds/1K with a bit execution of 4 microseconds. The Maximum Power Requirement of this module is 50 VA; its power supply inrush rating is 40 A with a wire size of 12 AWG.

Sometimes, the system’s power source may be temporarily disrupted; this can be caused by voltage levels dropping substantially below the normal voltage range for a small period of time.