Yokogawa S9548FA Battery Pack
The Yokogawa S9548FA, also cataloged as the S9548FA Battery Pack, operates as a dedicated hardware component for continuous memory backup power supply within Yokogawa system controller racks. It delivers stable direct current auxiliary voltage to preserve volatile CPU SRAM memory states, system clock structures, and controller execution parameters during main power interruptions.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | S9548FA |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.80 kg (Shipping Weight: 2.00 kg) |
| Dimensions | 130 mm x 40 mm x 125 mm |
| Operating Temp | 0 to 50 deg C |
| Power Consumption | Auxiliary power supply cell (Output: Nominal DC battery bus voltage) |
| Module Type | Battery Pack |
| Primary Application | Controller memory backup and RTC maintenance |
| Mounting Type | Dedicated controller chassis battery slot |
| Casing Construction | Industrial-grade enclosed metal/polycarbonate housing |
Cold Junction Compensation and DCS Signal Integrity
In distributed control station nodes, the S9548FA maintains uninterrupted power to internal system registers that store active analog input calibration coefficients and cold junction compensation (CJC) reference tables. Channel-to-channel isolation circuits on connected thermocouple and 4-20 mA HART loop protocol I/O modules depend on stable processor memory retention during power cycles. By maintaining voltage across the system backplane memory bus without millisecond drops, the module ensures zero parameter loss and prevents system recalibration requirements upon main AC/DC power restoration.
Frequently Asked Questions
Q: Can the S9548FA battery pack be replaced while the control station remains powered?
A: Yes. Online replacement (hot-swapping) is fully supported provided primary backplane power remains active to maintain controller memory while the depleted battery unit is removed.
Q: How should depleted S9548FA battery packs be handled prior to installation of a fresh unit?
A: Disconnected battery packs must have their connector terminals insulated with non-conductive tape to prevent short circuits during removal and disposal according to local industrial chemical waste guidelines.
Field Installation Guidelines
- Confirm that primary backplane power to the target controller subrack is active before removing an existing battery pack to prevent memory loss during the procedure.
- Unlatch the retaining clip on the battery housing slot and carefully pull the S9548FA out of the subrack chassis.
- Inspect the replacement battery pack connector pins for any signs of surface oxidation or physical damage.
- Align the S9548FA with the internal chassis guide rails and push firmly until the rear connector latches securely into the backplane receptacle.
- Verify that the system diagnostic LED indicates a normal battery status and clear any low-voltage battery alarms on the operator interface console.
Yokogawa S9548FA Battery Pack
Yokogawa S9548FA Battery Pack
The Yokogawa S9548FA, also cataloged as the S9548FA Battery Pack, operates as a dedicated hardware component for continuous memory backup power supply within Yokogawa system controller racks. It delivers stable direct current auxiliary voltage to preserve volatile CPU SRAM memory states, system clock structures, and controller execution parameters during main power interruptions.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | S9548FA |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.80 kg (Shipping Weight: 2.00 kg) |
| Dimensions | 130 mm x 40 mm x 125 mm |
| Operating Temp | 0 to 50 deg C |
| Power Consumption | Auxiliary power supply cell (Output: Nominal DC battery bus voltage) |
| Module Type | Battery Pack |
| Primary Application | Controller memory backup and RTC maintenance |
| Mounting Type | Dedicated controller chassis battery slot |
| Casing Construction | Industrial-grade enclosed metal/polycarbonate housing |
Cold Junction Compensation and DCS Signal Integrity
In distributed control station nodes, the S9548FA maintains uninterrupted power to internal system registers that store active analog input calibration coefficients and cold junction compensation (CJC) reference tables. Channel-to-channel isolation circuits on connected thermocouple and 4-20 mA HART loop protocol I/O modules depend on stable processor memory retention during power cycles. By maintaining voltage across the system backplane memory bus without millisecond drops, the module ensures zero parameter loss and prevents system recalibration requirements upon main AC/DC power restoration.
Frequently Asked Questions
Q: Can the S9548FA battery pack be replaced while the control station remains powered?
A: Yes. Online replacement (hot-swapping) is fully supported provided primary backplane power remains active to maintain controller memory while the depleted battery unit is removed.
Q: How should depleted S9548FA battery packs be handled prior to installation of a fresh unit?
A: Disconnected battery packs must have their connector terminals insulated with non-conductive tape to prevent short circuits during removal and disposal according to local industrial chemical waste guidelines.
Field Installation Guidelines
- Confirm that primary backplane power to the target controller subrack is active before removing an existing battery pack to prevent memory loss during the procedure.
- Unlatch the retaining clip on the battery housing slot and carefully pull the S9548FA out of the subrack chassis.
- Inspect the replacement battery pack connector pins for any signs of surface oxidation or physical damage.
- Align the S9548FA with the internal chassis guide rails and push firmly until the rear connector latches securely into the backplane receptacle.
- Verify that the system diagnostic LED indicates a normal battery status and clear any low-voltage battery alarms on the operator interface console.
