Modicon M340 PAC requires no battery, eliminating program loss and maintenance costs during power failure. It comes in a compact 4-in. high x 3.7-in. deep size, and uses high-density 64-point I/O cards only 1.25 in. wide. It uses CANopen networks to reduce field wiring and reduce installation costs. It has 4MB of memory upgradeable to 16 MB and an execution speed of 70K instructions/ms.