The C30-M03-HCH-F6D-H67-MXX-PXX-UXX-WXX is a Multilin C30 universal relay hardened programmable logic controller within the universal relay Multilin system. This logic controller is designed to provide the user with substation control logic that can replace SOE recorders and increase the capacity of I/O protection devices. The C30 is able to accept feedback from other control or protection devices in the system using communications that are much more cost effective than hard-wired signals. This form of communication (high-speed peer-to-peer) reduces the bay and station wiring required as well. The order specifications unique to the C30-M03-HCH-F6D-H67-MXX-PXX-UXX-WXX Hardened Programmable Logic Controller are as follows. The 03 (-M03-) alphanumeric code indicates the IEC 61850 software option. The 'HCH' designation shows that this C30 is the standard horizontal 19 inch rack controller with a high voltage power supply. The F6D shows that this unit has 16 digital inputs for its digital I/O specification and 8 Form-A (no monitoring) outputs (H67 alphanumeric). The XX indication following the last order specifications show that no module is selected in these respects.  As one can see, the variability is profound with regard to the C30, adding to user tailored customizability of the controller.