The IC698CHS017B is the “B” revision of GE Fanuc’s 17‑slot rear‑mount rack (chassis) for PACSystems RX7i / Series 90‑70 systems. It provides a large VME‑style backplane for high‑density CPU, I/O, and specialty module configurations.

Function and application

• Role: Serves as the main enclosure and backplane for RX7i CPUs, power supplies, and up to 17 modules (digital/analog I/O, communications, motion, VME cards, etc.).
• Platform: Compatible with RX7i controllers, Series 90‑70 I/O, and many VME modules.
• Mounting style: Designed as a wall / rear‑mount (panel‑mount) rack, typically installed inside control cabinets with front access to modules.

Key specifications (typical for IC698CHS017 / 017B)

From GE documentation and distributor data:

• Slots: 17 universal slots (VME‑style, 0.8 in / 20.3 mm pitch)
• Backplane: VME64‑compatible bus supporting high‑speed data exchange between modules
• Mounting: Rear (wall) mount; suited for 19‑inch class cabinet installations
• Power distribution: Integrated backplane rails; designed for standard RX7i power supplies (e.g., 100 W / 350 W class) with typical backplane logic at 5 VDC and internal rails such as 3.3 VDC for some modules.
• Environmental (typical):
  • Operating temperature: roughly ‑10 °C to +55 °C (some docs cite 0 °C to 60 °C)
  • Humidity: up to 95 % non‑condensing
• Certifications: Commonly listed with industrial approvals (UL/CSA/CE type) depending on configuration and region.

What the “B” suffix means

• As with other GE Fanuc part numbers, the trailing letter (A, B, etc.) indicates a hardware revision (e.g., updated backplane layout, connectors, or compliance markings) while preserving the same basic form factor and slot count.
• In practice, IC698CHS017 and IC698CHS017B are treated as interchangeable 17‑slot RX7i rear‑mount racks for most system designs; the “B” mainly matters for exact revision control, spare‑part matching, and documentation.

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