Description
The Yokogawa F3SP21-0N is a sequence CPU module engineered for the FA-M3 programmable logic controller (PLC) platform. It functions as the central processor unit responsible for executing user control logic, coordinating internal backplane traffic, and managing data exchange across connected digital and analog I/O modules.
Procurement and Availability
- Condition: New Surplus / Factory Sealed or Refurbished (tested working)
- Standard Lead Time: 1 to 3 weeks (subject to prior stock availability)
- Warranty: 12-month standard replacement warranty
- Pricing: Indicative market pricing applies; contact engineering sales for a firm quote.
Technical Specifications
| Parameter | Value |
| Manufacturer | Yokogawa |
| Model Number | F3SP21-0N |
| Product Series | FA-M3 PLC Platform |
| Module Type | Sequence CPU Module |
| Program Memory Capacity | Varies by system project configuration (verify version) |
| Execution Speed | High-speed basic instruction processing |
| Supported Racks | Main base unit or multi-CPU expansion slots |
| Communication Ports | Built-in programming/computer link port |
| Internal Power Consumption | Approx. 300 to 400 mA max (5 V DC backplane supply) |
| Backup Battery | Internal lithium battery for program/data retention |
| Operating Temperature | 0 to +55 °C |
Engineering Integration Notes
When deploying the F3SP21-0N within an FA-M3 base unit, ensure the system power supply unit provides sufficient 5 V DC backplane current to cover both the CPU and all loaded I/O expansion cards. In multi-CPU configurations, verify slot placement rules and communication parameter settings via the WideField programming environment to prevent bus contention errors.
Observe proper static discharge precautions when handling the module, as exposed circuit traces and onboard components are sensitive to electrostatic events. Always power down the base unit rack completely before seating or unseating the CPU module to protect backplane pin connectors from arcing and surge damage.
Frequently Asked Questions
Q: Can multiple CPU modules be installed on a single FA-M3 base rack?
A: Yes, the FA-M3 architecture supports multi-CPU configurations (up to 4 CPUs depending on the base unit model), allowing task distribution across separate sequence or specialty processors.
Q: What programming software is required to configure the F3SP21-0N?
A: Configuration, ladder logic development, and debugging require Yokogawa’s WideField or WideField3 engineering toolset.
Q: How long does the internal backup battery last under normal operating conditions?
A: The internal lithium battery typically maintains program memory and device data for over 10 years at room temperature. Preventive replacement is recommended prior to long-term deployments.
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