The Logic-Controls LM3000 Logic Net Control Unit control module was designed to meet the most demanding requirements of an industrial network. There are no disk drives, fans or mechanical parts that can easily fail. The enclosure is a heavy-duty zinc die cast case for extra ruggedness. Every module uses snap-to-lock connectors for secure connections. The LM3000 Logic Net Control Unit communicates with LS3000 I/O stations using communications protocols and topologies with proven reliability. It features high common-mode noise rejection network wiring. The poll/select protocol functionality avoids data collision, and the cyclic redundant checks virtually eliminate all communication errors. A zero single-point-of-failure configuration is also supported. LM3000 Logic Net Control Unit connections provide for a redundant data path to prevent network interruption due to a line breakage. The LM3000 Logic Net Control Unit has low power consumption that results in low internal temperature rise for higher mean time between failure. In addition, the units are tamper proof, with no on/off or selection switches and no adjustable devices.