The Allen-Bradley / Rockwell Automation 1785-L40L is a Standard PLC-5/40L Processor with 48K of memory. This processor includes 2 DH+ port (mode), universal remote I/O (adap or scan), and 1 extended local I/O. Number of I/O chassis max. for universal remote is 32 max. per I/O link. Total number of I/O chassis max. is 61. 1785L40L houses 1 RS-232-C/422-A/423-A Port(s). Backplane current load for 1785-L40L @ 5V is 3.3 A.