Description
GE Fanuc IC697CHS790D | Series 90-70 PLC Rack | 9-Slot Rear Mount
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE Fanuc Automation |
| Catalog Number | IC697CHS790D |
| Product Type | Standard PLC Rack / Chassis |
| PLC Family | Series 90-70 |
| Rack Type | Standard |
| Module Slots | 9 |
| Power Supply Position | Dedicated power-supply slot |
| Mounting | Rear / panel mount |
| Dimensions | 11.15 × 19.00 × 7.5 in. |
| Dimensions, Metric | Approx. 283 × 483 × 190 mm |
| Slot Width | 1.6 in. |
| I/O Bus Current | 0.5 A |
| Maximum 5 V Current | Up to 20 A, depending on installed power supply |
| VME Architecture | Designed to support VME Standard C.1 |
| Rack Identification | Four jumpers behind the power-supply position |
| Compatible Modules | Series 90-70 IC697 modules |
| Power Supply | Plug-in IC697 AC/DC or DC power supply, depending on configuration |
GE’s Series 90-70 data sheet specifies the standard IC697CHS790 rack family as a nine-slot rear-mount rack, with 11.15 × 19.00 × 7.5 in. dimensions and up to 20 A available on the 5 V bus when used with the applicable 100 W power supply.
Product Introduction
The GE Fanuc IC697CHS790D is the backplane chassis used to assemble a Series 90-70 PLC system around a CPU, communication modules, and local I/O. The rack provides the electrical interconnection between installed IC697 modules and the system power supply; it is therefore an infrastructure component rather than an active processor or I/O device.
The D revision is particularly relevant when maintaining an older installed system. GE documentation identifies IC697CHS790D as compatible with the corresponding rack fan assemblies, while the standard rack documentation confirms the nine-slot rear-mount architecture.
IC697CHS790D
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
A damaged rack backplane can create symptoms that look like multiple module failures: intermittent CPU faults, loss of I/O, communication errors, or modules that fail to initialize. Before replacing several electronic modules, inspect the rack connectors, backplane, power-supply interface, rack identification jumpers, and mechanical alignment.
Typical Applications
- GE Fanuc Series 90-70 PLC control cabinets
- Central CPU racks containing IC697 processors and I/O
- Local and remote Series 90-70 I/O configurations
- Legacy machine-control and process-control cabinets
Technical Pitfalls to Avoid
- Do not confuse IC697CHS790D with IC697CHS791.
Both are nine-slot standard racks, but CHS790D is the rear/panel-mount version, while CHS791 is the front/rack-mount configuration. GE documentation distinguishes these mounting arrangements. - Match the rack revision, not just “CHS790.”
The suffix matters for maintenance work. GE specifically lists IC697CHS790D among the racks compatible with the later IC697 rack fan assembly. - Verify the power supply before calculating available bus current.
The rack itself does not establish a universal 5 V current capacity. GE specifies different maximum currents depending on whether the rack is equipped with a 100 W, 55 W, 90 W 24 VDC, or 90 W 48 VDC supply. - Check rack identification jumpers when used as an expansion rack.
Series 90-70 rack identification is implemented through four jumpers located behind the power-supply position. Incorrect rack identification can prevent a multi-rack configuration from operating as intended.
Related Products
- IC697CHS790 — Standard Series 90-70 nine-slot rear-mount rack; earlier/base catalog designation.
- IC697CHS791 — Nine-slot front-mount Series 90-70 rack; same general rack capacity but different mounting arrangement.
- IC697CHS750 — Five-slot rear-mount standard rack for smaller Series 90-70 configurations.
- IC697CHS782 — 17-slot VME Integrator rear-mount rack for applications requiring additional VME positions.
- IC697CHS783 — Front-mount VME Integrator rack.
- IC697PWR710 — 120/240 VAC or 125 VDC, 50 W Series 90-70 power supply used in applicable configurations.
- IC697PWR711 — Higher-capacity AC/DC power supply for Series 90-70 systems.
- IC697PWR724 — 24 VDC, 90 W power supply compatible with applicable IC697 racks.
- IC697CBL700 — Power-supply expansion cable used when extending rack power arrangements.
- IC697ACC721/724/744 — Rack fan assemblies for applicable Series 90-70 racks; the later fan assembly is documented as compatible with .
Procurement & Replacement Check
Before approving an , verify:
- Exact catalog number:
- Series 90-70 system
- Nine-slot configuration
- Rear/panel mounting requirement
- Backplane connector condition
- Rack identification jumper configuration
- Installed power-supply type
- Required 5 V bus current
- CPU and I/O module compatibility
- Rack expansion requirements
- Fan requirements and cabinet cooling
- Physical mounting dimensions
- Rack revision and nameplate condition
Recommended procurement description:
GE Fanuc Series 90-70 Standard PLC Rack, 9-Slot Rear/Panel Mount, Backplane Chassis for CPU and I/O Modules.
The key distinction is simple: is the Series 90-70 rack/backplane, not the PLC CPU itself. The CPU, communication modules, and I/O modules are installed into the rack, while the rack provides their mechanical mounting and electrical backplane connection.
