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Product Overview
The Schneider 140CPU67160 is a Modicon Quantum Unity Hot Standby processor designed for high-availability PLC applications where continued control operation is important. It operates at 266 MHz and provides 1 MB of IEC program memory, with expansion capability through PCMCIA memory. The processor incorporates a built-in Ethernet coprocessor and a dedicated Hot Standby communication port for redundant controller architectures. Standard interfaces include Modbus, Modbus Plus, USB, and Ethernet-related connectivity. Schneider Electric has discontinued commercial sales of this legacy Quantum processor, while its published lifecycle information indicates end of standard service on December 31, 2026. A modern M580 redundant processor is listed as the recommended replacement.
Technical Specifications — 140CPU67160
| Parameter | Value |
|---|---|
| Product Model | 140CPU67160 |
| Manufacturer | Schneider Electric |
| Product Type | Modicon Quantum Unity Hot Standby Processor |
| Processor Speed | 266 MHz |
| IEC Program Memory | 1024 kB |
| Maximum Program Memory with PCMCIA | Up to 7168 kB |
| Communication / Protocol | Modbus, Modbus Plus, Ethernet, Hot Standby |
| Ethernet | Built-in Ethernet coprocessor |
| Hot Standby Port | Dedicated 100 Mbps interface |
| Bus Current | Approx. 2.5 A |
| Mounting | Modicon Quantum rack |
| Number of Local Racks | Up to 2 |
| Remote I/O | Up to 31 stations |
| Distributed I/O | Up to 63 stations |
| Battery | 3 V lithium |
| Status | Discontinued; service scheduled through Dec. 31, 2026 |
Schneider’s technical documentation confirms the 266 MHz processor, 1024 kB program capacity, 100 Mbps Hot Standby port, and Quantum rack architecture.
Key Features and Benefits — 140CPU67160
- Dedicated processor for Quantum Hot Standby architectures
- 266 MHz processing speed
- 1 MB IEC program memory
- PCMCIA expansion capability
- Built-in Ethernet coprocessor
- Modbus and Modbus Plus connectivity
- Dedicated Hot Standby communication interface
- Supports distributed and remote I/O architectures
- Suitable for legacy high-availability PLC installations
- Useful as a controlled MRO spare for existing Quantum systems
The Hot Standby function is the key reason to retain this processor in legacy inventories. It was designed for redundant controller applications where automatic continuity is more important than simply adding processing capacity.
Schneider 140CPU67160
Related Models
Schneider 140CPU67260: A higher-capacity Quantum Unity processor with 3 MB program memory and a similar 266 MHz architecture.
Schneider 140CPU67261: A related Quantum processor designed for Hot Standby applications with expanded memory and communication capabilities.
Schneider BMEH584040: Schneider Electric’s recommended M580 redundant processor replacement for legacy 140CPU67160 installations.
Schneider 140CPU65160: A standard Quantum Unity processor with 266 MHz processing and built-in Ethernet, intended for non-Hot Standby applications.
Installation and Maintenance — 140CPU67160
Before replacement, back up the PLC application, document the firmware version, key-switch position, memory configuration, and Hot Standby settings. Verify the rack configuration and communication cabling before removing the existing processor.
Use appropriate ESD precautions during handling. Check the battery condition, connectors, backplane contacts, and module seating. After installation, verify processor diagnostics, application execution, Ethernet communication, and Hot Standby synchronization before placing the redundant system back into service.
Personally, I would confirm the firmware and redundancy configuration first. On a legacy Quantum installation, a physically compatible CPU can still create commissioning problems if the operating-system revision does not match the existing application.
Product Warranty — 140CPU67160
Warranty coverage depends on supplier, equipment condition, and purchase terms. For new-old-stock, surplus, or refurbished inventory, confirm the hardware revision, serial number, firmware version, battery condition, test status, and warranty period before purchase.
The 140CPU67160 remains relevant as a maintenance spare for installed Quantum Hot Standby systems, but its discontinued status should be considered when planning long-term lifecycle support. Schneider Electric currently recommends migration to an M580 redundant processor for replacement applications.
