Core parameters
I/O slots: 5 (for installing DI/DO, AI/AO ordinary IO modules)
Left side 1 power slot: compatible with IC693PWR321/331 and other 90-30 power modules
Right interface: 25 Pin D Sub Female Local Expansion Bus
Backboard 5V consumption: 170 mA
Maximum local extension cable distance: 15.24 meters (50 feet), use remote backplane IC693CHS399 for over distance
DIP dialing: Set the extension rack number
Installation: DIN rail 35mm, IP20, for cabinet use, does not support hot swapping
Life cycle: The original factory has ceased production, and the circulation includes inventory of new machines, dismantled machines, and refurbished parts
core functionality
Compact I/O expansion
5 IO slots, suitable for scenarios with limited control cabinet space; Only supports regular digital and analog IO modules; Advanced intelligent modules such as PCM, CMM311, BEM330, etc. cannot be placed on this motherboard and can only be placed on the CPU mainframe.
Local parallel bus communication
Connect the CPU main board (IC693CHS397/CHS391) through a dedicated expansion cable, and the backplane bus forwards IO data. All IO is processed by the CPU uniformly.
Multi rack numbering management
On board DIP dialing sets the rack number, and the CPU recognizes different expansion racks.
The limit on the number of racks is consistent with CHS392:
CPU331/340/341: Up to 4 expansion boards (CHS392/CHS398 mixed also counted as total)
CPU350 and above (363/364/374): up to 7 expansion boards

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