Description
The 140CPU67160 is a high-performance, high-availability central processing unit from the Modicon Quantum series. Specifically designed for Hot Standby (HSBY) configurations using the Unity Pro (now EcoStruxure Control Expert) software environment, this processor is a staple in critical infrastructure where downtime is not permissible, such as in oil and gas, water treatment, and power generation.
Availability and Procurement
- Condition: New Original (Factory Sealed), New Surplus, or Refurbished (Standardized Industrial Testing)
- Warranty: 12-month technical replacement warranty
- Lead Time: Usually ships within 1–2 business days from stock
- Pricing: Subject to market supply for legacy Quantum components; contact us for a firm, dated quote.
Technical Specifications
The 140CPU67160 offers significant memory and processing speed upgrades over earlier 140CPU series modules, supporting more complex logic and larger I/O counts.
| Parameter | Specification |
| Processor Speed | 266 MHz |
| Internal RAM | 1024 KB (Program) / 768 KB (Data) |
| Expansion Memory | Supports PCMCIA card (up to 8 MB) |
| Hot Standby Support | Integrated (Sync via dedicated fiber optic link) |
| Ethernet Ports | 1x 10/100 Mbps (Service port) |
| Serial Ports | 1x Modbus RS-232, 1x Modbus Plus |
| Max I/O | Up to 31 Remote I/O drops (S908 or Ethernet) |
| Current Draw | 2.5 A at 5 V DC |
Core Functionality: Hot Standby Architecture
The defining feature of the 140CPU67160 is its ability to operate in a redundant pair.
1. Bumpless Transfer
In an HSBY configuration, two identical 140CPU67160 processors are installed in separate racks. The “Primary” processor executes logic and controls I/O, while the “Standby” processor remains synchronized via a high-speed fiber optic link. If the Primary CPU fails, the Standby assumes control in less than one scan cycle (typically <50ms), ensuring a “bumpless” transition that prevents process upsets.
2. Communication Redundancy
The module supports dual-ring topologies. When used with the appropriate communication modules (like the 140NOE series), the system maintains connectivity to the SCADA even if a network cable is severed.
3. Unity Pro Environment
This processor is optimized for the Unity Pro (EcoStruxure) software, allowing for online modifications. You can update the program in the Primary CPU and “transfer” those changes to the Standby CPU without stopping the process.
Engineering Insights: Deployment and Lifecycle
As an architect who has commissioned dozens of Quantum HSBY systems, I recommend the following for system integrity:
1. Firmware Synchronization
Critical: The Primary and Standby processors must have identical firmware versions. A mismatch will prevent the processors from entering the “RUN” state together, often resulting in a “Standby Offline” error. Always check the firmware revision on the side of the module before installation.
2. The Fiber Optic Link
The synchronization link is the lifeline of the HSBY system. Use only high-quality multi-mode fiber. I have seen systems fail because of tight bends in the fiber cable causing intermittent signal loss, which triggers unnecessary CPU swaps.
3. Power Supply Selection
The 140CPU67160 draws 2.5 A at 5 V. In a fully populated rack with multiple Ethernet and I/O modules, ensure your 140CPS power supply is sized correctly. A 140CPS11420 (High Capacity) is often required for these high-performance CPUs.
4. Legacy Migration
While the Quantum line is now in the “Mature” phase of its lifecycle, the 140CPU67160 remains highly sought after for sustaining existing plants. If you are planning a new system, consider the Modicon M580 series; however, for a direct “drop-in” replacement in an existing Quantum rack, this is the most powerful HSBY option available.
FAQ
Q: Can I use this CPU without the Hot Standby feature?
A: Yes, the 140CPU67160 can function as a standalone high-performance processor. However, you are paying a premium for the HSBY capabilities that would go unused.
Q: What battery does it use?
A: It uses the standard 490NOR00003 lithium battery to back up the internal RAM. If the “BAT” LED on the front panel is red, the battery should be replaced immediately while the rack is powered to avoid losing the program during a power cycle.
Q: Does it support the Modbus Plus network?
A: Yes, it has an integrated Modbus Plus port (DB9). This is commonly used for peer-to-peer communication between different Quantum or Premium PLC racks.
| Schneider Electric 7400213-100 |
| Schneider Electric 140NRP31201 |
| Schneider Electric NWRR85001 |
