GE IC693CHS391 Series 90-30 10-Slot Modular CPU Expansion Baseplate

 Backplane voltage is 5 VDC nominal. Backplane current requirement is approximately 420 milliamperes for baseplate electronics. Connector is a 25-pin female connector for expansion cable connection. Default rack address is 0. Dimensions are approximately 17.44 x 5.12 x 5.59 inches. Mounting is panel mounting with screws and washers.

Modular design allows replacement or upgrade to different baseplate types. CPU slot in position 1 accepts modular CPU or special option modules. Slots 2 through 10 accept standard I/O and option modules. Expansion port supports connection of up to 4 or 7 additional baseplates depending on CPU model. DIP switch allows rack address configuration.

Water and wastewater stations, small process units, OEM machinery, material handling cells, brownfield upgrades, and any application requiring expansion of Series 90-30 I/O capacity.

10-slot capacity supports substantial I/O and module density. 420 mA backplane current provides stable power distribution. 25-pin expansion connector supports reliable backplane extension. Panel mounting ensures rigid installation in industrial cabinets.

Industrial-grade metal frame with backplane printed circuit board, gold-plated connectors, and mounting hardware.

Rigid metal frame with guided slots for module alignment. Left-side power supply slot with unique sizing to prevent incorrect module insertion. Right-side 25-pin female expansion connector. Mounting holes for panel installation.

The baseplate provides the physical chassis and electrical backplane for Series 90-30 modules. The backplane distributes 5 VDC power to all installed modules and provides parallel data/address buses for CPU-to-module communication. The expansion connector extends these signals to additional baseplates.

Only one CPU baseplate is permitted per system; additional baseplates must be expansion or remote types. Verify total backplane current does not exceed power supply capacity. Leave current margin for future module additions. Keep expansion cable routing away from high-noise conductors.