DS215SLCCG4AZZ01A is a LAN Communication Card and it contains software PROMPTs SSLC card is located in L1 in R, S, T, C, D cores in Mark V Control systems. SSLC contains both isolated and nonisolated circuits for communications to the driver (or) excitor; the SSLC features a 16-position Alpha-Numeric display that connects to the programmer module. The SSLC LAN control processor (LCP) software in EPROMs U6 and U7 cannot be configured in the field and these are replaceable and can be moved from one board to another board.