The 756-L61 processor module is part of the ControLogix family of products designed by Allen-Bradley/Rockwell Automation. The module/controller is available in Series A and Series B variants and has either 2 MB,4 MB or 8 MB of fixed memory as well as a non-volatile memory that can be used by integrating a compact flash memory card as an option. In addition to this, the non-volatile optional memory * for backup storage is 128 MB, and the controller also has 2 MB of user memory and 478 KB of I/O memory. The controller uses only 1784-CF128 Compact Flash memory cards. The product codes for cases compatible with this controller are 1756-A4 / A7 / A10 / A13 and -A17. The 1756-L61 processor module has 128,000 *I/O and 4,000 Input / 2,000 output (* analog I/O). At DC 5 V, the backplane current is 1. 2 amps, and the backplane current at 24 volts DC is 14 mA. In addition, it is worth mentioning that its program scan time is 0.08 milliseconds.