Yokogawa S9450FE CENTUM VP & ProSafe-RS Battery
The Yokogawa S9450FE, also cataloged as the S9450FE Lithium-Ion Battery, operates as a dedicated hardware component for SRAM volatile memory backup and real-time clock retention within CENTUM VP, CS 3000, and ProSafe-RS platforms. The module provides direct electrical energy storage to preserve critical system configurations, process variables, and alarm logs during field power failures. Integrated safety circuitry incorporates overcharge protection and thermal monitoring to sustain continuous power delivery to S2CP471 processor units.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | S9450FE |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 2.0 kg |
| Dimensions | 150 mm x 115 mm x 90 mm |
| Operating Temp | Industrial control room temperatures (Service life rated at LE 30 deg C) |
| Power Consumption | 3 VDC Nominal output voltage |
| Battery Chemistry | Rechargeable Lithium-Ion |
| Compatible Platforms | Yokogawa CENTUM VP, CS 3000, ProSafe-RS, FGS |
| Compatible Modules | S2CP471 Processor Modules |
| Primary Task | SRAM memory backup and Real-Time Clock (RTC) retention |
| Protection Features | Integrated overcharge protection and thermal monitoring |
| Service Life | Approximately 3 years at LE 30 deg C |
Channel-to-Channel Isolation & Cold Junction Compensation
Engineers integrate the S9450FE battery within central control racks that manage 4-20 mA HART loop protocol I/O networks and analog input modules featuring channel-to-channel isolation. The steady 3 VDC power supply maintains internal CPU state retention while process cards process temperature signals using cold junction compensation (CJC) circuits across field terminal blocks. This battery unit maintains real-time controller status without causing signal noise or ground loop potential within adjacent measurement channels.
Frequently Asked Questions
Q: What function does the S9450FE perform when main power to an S2CP471 CPU is lost?
A: The battery instantly supplies 3 VDC output to preserve volatile SRAM memory contents and keep the internal real-time clock running, preventing controller reset state corruption.
Q: How often must technicians replace the S9450FE battery in standard operation?
A: The unit features an estimated service life of 3 years under operating temperatures maintained at or below 30 deg C.
Field Installation Guidelines
Inspect the battery housing for physical integrity prior to inserting the S9450FE into the dedicated CPU module slot. Verify that the system enclosure is tied to a single point earth ground to minimize electrostatic discharge risk during installation.
Align the battery connector key with the internal header on the S2CP471 processor card and press firmly until fully seated. Observe polarity markings on the module housing during maintenance procedures. Dispose of depleted lithium-ion cells in accordance with local industrial chemical waste disposal regulations.
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