Overview
Configured for converting main input power into insulated DC supply voltages in Yokogawa ProSafe-RS Safety Instrumented Systems and associated control or node units, the Yokogawa SPW481 (SPW481 Power Supply Module) provides direct electrical power conversion for backplanes, processors, and connected I/O modules. The module supports specified AC or DC input options and provides insulated +5 V and +24 VDC outputs. In addition, dual-redundant configurations are supported where the system architecture requires redundant power sources.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SPW481 |
| Brand | Yokogawa |
| Product Type | Power Supply Module |
| Series / Application | ProSafe-RS Safety Instrumented System / Field Control Units / Node Units |
| Manufacturer | Yokogawa Electric Corporation |
| Origin | Japan |
| Input Voltage Options | 100-120 VAC, 220-240 VAC, or 24 VDC, depending on system configuration |
| Output Voltages | Insulated +5 VDC and +24 VDC |
| Redundancy Support | Dual-redundant output configuration supported |
| Mounting Type | Backplane connection slot within safety control or node units |
| Operating Temp | 0 to +55 deg C |
| Weight | Approx. 0.7 to 1.2 kg |
| Recommended Replacement Cycle | Approximately 8 years |
Process Control Power Isolation
The SPW481 supplies electrically insulated DC power to internal system hardware rather than functioning as a field signal interface. Therefore, it does not directly process 4-20 mA HART loops or provide FOUNDATION Fieldbus or Profibus PA communication.
Instead, the power module supports the electrical supply architecture used by processors, backplanes, and I/O hardware. The insulated +5 VDC and +24 VDC outputs separate internal supply functions according to the supported Yokogawa system design. In redundant installations, the power architecture can use dual module configurations where the applicable control or node unit supports redundant power operation.
Frequently Asked Questions
Q: Does the Yokogawa SPW481 directly process 4-20 mA or HART signals?
A: No. The SPW481 functions as a power supply module and provides insulated +5 VDC and +24 VDC outputs for internal system hardware. Field signal processing is performed by compatible I/O modules.
Q: Can the Yokogawa SPW481 be used in a redundant power configuration?
A: Yes. The provided technical data specifies support for dual-redundant output configurations. The final redundant arrangement depends on the compatible ProSafe-RS control or node unit architecture.
Q: What installation temperature range is specified for the Yokogawa SPW481?
A: The specified operating temperature range is 0 to +55 deg C.
Field Installation Guidelines
Install the Yokogawa SPW481 only in the designated backplane slot of a compatible safety control unit or node unit. Verify the system-specific input voltage configuration before applying power.
Disconnect or isolate the applicable supply source before inserting or removing the module unless the host system documentation explicitly permits energized replacement. Do not assume hot-swap capability when it is not specified for the installed system.
Route AC or DC supply wiring separately from low-level signal wiring where practical. Maintain the grounding and shielding arrangement defined for the complete Yokogawa cabinet or node assembly. After installation, verify module seating, input supply compatibility, redundant power connections where used, and system diagnostic status.
Emerson Top Products
| Emerson DeltaV | Epro | Ovation/Westinghouse |
| KJ1501X1-BC3 | 9100-00049-03 | 1C31122G01 |
| KJ3202X1-BA1 | A6110 | 1C31125G03 |
| KJ3222X1-BA1 | A6120 | 1C31232G01 |
| KJ3243X1-BA1 | A6125 | 1C31147G01 |
| KJ3002X1-BG1 | A6140 | 1B30035H01 |
| KJ3002X1-BB1 | A6210 | 1B30023H02 |
| KJ3001X1-BB1 | A6220 | 1B30023H01 |
| KJ3002X1-BC1 | A6312 | 1C31132G01 |
| KJ3002X1-BF1 | A6312/06 | 1C31129G03 |
| KJ3001X1-BJ1 | A6312/08 | 5X00119G01 |
Reviews
There are no reviews yet.