Description
Hard-Numbers: Technical Specifications
- Part Number:
- Processor Architecture: High-speed 32-bit RISC
- Clock Speed: 48 MHz
- Memory (RAM): 4 MB SRAM
- Memory (Flash): 8 MB Flash (for firmware and application storage)
- Communication Ports: 1 x RS-232, 1 x RS-485, Ethernet
- Operating Temperature: -25°C to +70°C
- Humidity Tolerance: 5% to 95% non-condensing
- Mounting: 5466-series DIN rail or card guide mounting
Woodward MFR2S45B
The Real-World Problem It Solves
Modern power plants and utilities face relentless cyber threats, and standard control processors lack the hardware-level encryption needed to stop sophisticated intrusions. The locks down the MicroNet rack by enforcing strict password policies, encrypting all communications via SSH, and creating a hardened footprint that satisfies rigorous NERC/CIP audit requirements.
Where you’ll typically find it:
- In the main control cabinet of a Frame 7EA gas turbine requiring NERC/CIP compliance before being allowed back online.
- Retrofitting existing MicroNet Plus racks (replacing standard 5466-1035 CPUs) at municipal water treatment plants to meet updated cybersecurity mandates.
- Serving as the primary sequencer for a steam header pressure control system where remote access must be strictly authenticated.
It stops unauthorized configuration uploads dead in their tracks.
Hardware Architecture & Under-the-Hood Logic
This unit is the central processing brain of the MicroNet system. Unlike standard CPUs, this variant runs a secure version of the VxWorks Real-Time Operating System (RTOS) designed to handle both deterministic control loops and encrypted data traffic without overloading the processor.
- Firmware Validation: On power-up, the bootloader performs a cryptographic check of the firmware to ensure the code hasn’t been tampered with.
- Hardware Encryption: The processor utilizes built-in encryption instructions to establish Secure Shell (SSH) tunnels for all configuration software (Toolkit) connections.
- Scan Cycle Execution: The CPU reads the states of all connected I/O modules (discretes, analogs, thermocouples) via the backplane, executes the user’s control logic (compiled C or function blocks), and writes the results back to the outputs.
- Watchdog Management: It continuously monitors system health. If a software glitch or communication timeout occurs, the hardware watchdog timer forces a safe shutdown state.
Field Service Pitfalls: What Rookies Get Wrong
Locking Themselves Out During Commissioning
Inexperienced techs often skip setting up the password manager properly during initial configuration. Because this CPU enforces NERC/CIP compliant password complexity, it will eventually expire the default credentials. If you haven’t set up a recovery admin account, you are locked out of the processor.
- Field Rule: Immediately create three distinct user accounts (Admin, Engineer, Operator) with complex passwords upon first connection. Document the credentials physically and store them in the plant’s secure safe, not on a sticky note on the monitor.
Disabling SSH Thinking It Will Speed Up Downloads
Under pressure to get a machine back online, a rookie might try to force the CPU into “unsecure mode” to bypass encryption, thinking it will speed up the logic download. The is hardcoded to reject unencrypted footprint updates; the download will fail every time.
- Field Rule: Accept the slight delay. Generate your SSH keys, configure your Toolkit software for secure comms, and wait the extra 30 seconds for the encrypted handshake. Forcing legacy protocols won’t work on this hardware.
Ignoring the Hardware Jumpers
Field techs often treat this like a standard PC, forgetting that the CPU’s physical security jumpers dictate the security profile. Leaving the jumper in the default “unsecured” position while trying to run secure firmware leads to a constant stream of authentication failure faults.
- Field Rule: Pop the top cover off the module. Locate the security profile jumper block. Ensure it is set to the “Secure” position before you attempt to apply power and sync with the system.
Woodward MFR2S45B
Commercial Availability & Pricing Note
Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.
