Description
Product Description
The Schneider Electric 171CBU78090 is a powerful processor for the Modicon Momentum series. It uses the Spear 320s architecture. The 32-bit word length handles complex automation math. Clock speed reaches 333 MHz for fast logic execution. Each Kinstruction runs in exactly 83 nanoseconds. This processor supports up to 2048 inputs and 2048 outputs. It works with 32 Modbus devices in a multidrop topology. The unit is ideal for industrial control systems needing high density and speed.
Key Technical Specifications
- Brand: Schneider Electric
- Model: 171CBU78090
- Series: Modicon Momentum
- Processor Core: Spear 320s
- Word Length: 32-bit
- Clock Frequency: 333 MHz
- Supply Voltage Limits: 4.75…5.25 V DC
- Current Consumption: 500 mA at 5 V DC
- Register Words: 26048
- I/O Limit: 2048 inputs / 2048 outputs
- Number of Modbus Devices: 32
- Exact Time for 1 Kinstruction: 83 ns
- Topology: Multidrop Modbus
- Mounting: 35 mm symmetrical DIN rail
- IP Protection: IP20
- Shock Resistance: 15 gn for 11 ms
- Weight: 0.45 kg (1.00 lbs)
Environmental & Performance Features
- Temperature range: 0°C to +60°C operational
- Humidity tolerance: 5% to 95% non-condensing
- Noise immunity: Meets IEC industrial standards
- ESD resistance: ±8 kV air discharge
- Linear processing: No jitter in scan time
- Resolution: Bit-level control for discrete I/O
Installation Guide
- Clip unit onto 35 mm symmetrical DIN rail.
- Secure with end stops on both sides.
- Connect 5 V DC power within 4.75…5.25 V.
- Use shielded cables for Modbus network.
- Keep air gap for cooling around the unit.
Debugging & Maintenance Convenience
- LED indicators for power, run, and error status.
- Diagnostic counters for Modbus communication.
- Hot-swap not supported. Power off before replacement.
- Firmware updates via Modbus port.
- Clear register mapping table for fast troubleshooting.
Compatibility
- Works with all Modicon Momentum I/O modules.
- Fully compatible with Modbus RTU masters.
- Supports Modicon Quantum series via gateway.
- Programming software: Concept, ProWORX.
Certifications
- CE marked
- UL listed
- CSA certified
- RoHS compliant
- EAC approval
Package Contents
- 1x 171CBU78090 processor unit
- 1x product label sheet
- No power cable or terminal block included
Warranty & Shipping
- 12-month warranty from shipment date.
- Covers manufacturing defects only.
- Shipping carriers: FedEx, UPS, DHL.
- Express delivery worldwide. Tracking number provided.
Typical Applications
- Packaging machine control
- Material handling systems
- HVAC central controllers
- Water treatment I/O concentration
- Factory automation data collection
Diagnostic Capabilities
- Built-in Modbus diagnostic counters.
- Detects slave timeouts and CRC errors.
- Scan time monitoring via software.
- Watchdog timer for processor health.
- Cold restart after power loss recovery.
FAQ – Frequent Questions & Buying Guide
- What is the exact execution speed?
- 83 nanoseconds per 1000 instructions. Very fast for logic.
- Can I use this with 24 V DC systems?
- No. It needs 5 V DC ±5%. Use a separate 5 V supply.
- Does it support Ethernet?
- No direct Ethernet. Use Modbus to Ethernet gateway.
- How many registers can I store?
- 26048 register words. Sufficient for large data blocks.
- What fails most often in the field?
- Power supply ripple above 5.25 V damages the unit. Use a stable 5 V supply.
- Buying guide: Which model for more I/O?
- Choose 171CBU78090 for 2048 I/O. For smaller needs, see 171CBU78010.
- Buying guide: Is this good for new projects?
- Yes for Modbus-only designs. For Ethernet/IP, consider M340 series.
- Can I mix with Quantum I/O?
- Yes through Modicon Quantum adapter.
Contact & Support
- For inquiries, call +86 158 8020 0923 (WhatsApp).
- Technical support available within 24 hours.
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