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IC694CHS392 is a 10-slot serial expansion backplane in the GE Fanuc PACSystems RX3i series. It is used to expand the number of I/O modules and support the distributed architecture of control systems. Here are its detailed specifications:
- Model: IC694CHS392
- Brand: GE Fanuc
- Series: RX3i PACSystem
- Function: Serves as a serial expansion backplane to connect I/O modules with the main controller, supporting distributed I/O configurations.
| Parameter |
Details |
| Number of Slots |
10 slots (The first slot on the left must be occupied by a power module; the rest are for I/O modules or special-function modules). |
| Communication Protocol |
Supports GE Fanuc’s SNP (Serial Network Protocol) for communication with the main controller. |
| Expansion Distance |
Maximum expansion distance of 15 meters (50 feet); multiple expansion backplanes can be connected via a daisy-chain. |
| Power Requirements |
– 5VDC (provided by a power module such as IC694PWR331)
– Backplane’s own power consumption is approximately 150mA. |
| Mechanical Specifications |
– Dimensions: 13.0cm (length) × 44.3cm (width) × 14.2cm (height)
– Weight: Approximately 1.8kg. |
| Operating Environment |
– Temperature: 0°C to 60°C (non-condensing)
– Humidity: 5% to 95% (non-condensing). |
| Protection Class |
IP20 (must be installed in a control cabinet). |
-
Distributed I/O Expansion
Connects the main controller to extended I/O modules via a serial bus, supporting remote installation and adapting to large-scale control systems.
-
Modular Design
Can flexibly configure different types of I/O modules (digital, analog, special-function modules) to meet diverse needs.
-
Hot-Swap Support
Some modules support hot-swapping (specific module models need to be confirmed), reducing system downtime.
-
Redundancy Capability
Compatible with dual-CPU redundant configurations (when used with the RX3i redundant system), improving system reliability.
-
Termination Management
A termination resistor (such as IC693ACC307) must be installed at the end of the backplane to prevent signal reflection and ensure stable communication.
- Module Installation: The leftmost slot must be occupied by a serial power module (e.g., IC694PWR331/330/321). Unused slots require filler panels to prevent dust and ensure heat dissipation.
- Wiring Requirements: Use shielded cables for serial communication to reduce electromagnetic interference (EMI).
- Power Safety: Power off before installing/uninstalling modules (hot-swap is not supported for the backplane itself).
Widely used in industrial automation systems requiring large-scale I/O expansion, such as:
- Production line control (automotive, electronics manufacturing)
- Process control (chemical, pharmaceutical, water treatment)
- Distributed monitoring systems (power, metallurgy)
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