Project specifications
The total number of slots is 10 slots; The leftmost slot must be equipped with a power module (IC694PWR321/330/331), and the remaining 9 I/O slots should accommodate modules such as DI/DO/AI/AO
Bus type only high-speed serial bus, no PCI bus, cannot install CPU module
Backboard consumes 150mA @ 5VDC of its own power
Expansion cable IC693CBL302; The maximum length of a single piece is 15 meters (50 feet); The entire system can have up to 7 serial expansion backboards; CPU to farthest expansion backplane total length ≤ 15 meters
Dial switch on the side of the backplane to set the extension rack number and avoid rack address conflicts
The modules on the hot swappable serial expansion backplane do not support hot plugging; Empty slots must be equipped with IC694ACC310A empty slot filling blocks, otherwise the bus will report an error
Environment 0-60 ℃, 5-95% RH without condensation, IP20, DIN rail/screw installation
Compatible module RX3i IC694 series I/O module; Not supporting IC695 high-performance module (IC695 module requires PCI bus host rack)
✅ core functionality
When there are not enough slots on the RX3i host rack for I/O point expansion, CHS392 is connected through a serial expansion cable to add 10 slots for deploying DI, DO, and analog modules, expanding the overall IO scale of the machine.

❗ CPU cannot be placed, it can only be placed on the IC695CHSxx host rack.

The local distributed I/O expansion rack can be placed in the same control cabinet or nearby in the on-site auxiliary cabinet to shorten sensor wiring and reduce cable length.
The left power module (PWR330, etc.) of the backplane power supply bus provides 5V power to all I/O modules in this rack; The on-site load power supply still requires an external 24V power supply, and the backplane power supply does not drive loads such as solenoid valves.
Multiple rack cascaded CPUs with up to 7 serial expansion backboards (CHS392/CHS398 mixed use), assigned rack IDs through dialing, and software Proficy ME identifies different rack I/O addresses.

Recommended other models：