The Yokogawa SPW484 is a DC input power supply module used in Yokogawa ProSafe-RS (SIS) and CENTUM VP / FCU / FIO systems.
Unlike SPW481/SPW482 (AC input), the SPW484 is designed for 24 V DC input systems, making it suitable for:
- Battery-backed systems
- DC distribution panels
- Offshore / hazardous environments
- High-reliability redundant power architectures
It converts DC input into stable internal system voltages required by CPU, I/O, and communication modules.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Yokogawa |
| Model | SPW484 |
| Product Type | DC Power Supply Module |
| System | ProSafe-RS / CENTUM / FCU / FIO |
| Input Voltage | 24 V DC (±20%) |
| Input Range | ~19.2 – 28.8 V DC |
| Output Voltage | +5 V DC / +24 V DC (internal system bus) |
| Power Capacity | ~200 W class (system dependent) |
| Redundancy | Supported (dual module configuration) |
| Protection | Overvoltage / overload / short circuit |
| Operating Temperature | -20°C to +70°C (ISA G3 class) |
Physical Characteristics
| Item | Specification |
|---|---|
| Dimensions (W × H × D) | Approx. 146 × 199 × 50 mm |
| Weight | ≈ 0.9 – 1.2 kg |
| Mounting Type | Rack-mounted module |
| Installation | FCU / SCS / node rack |
| Cooling | Natural convection (cabinet ventilation) |
System Role
The SPW484 is used in DC-powered control systems:
24 V DC input → SPW484 → system DC bus → CPU / I/O / ESB modules
It is often used in redundant power configurations:
-
SPW484 (A) + SPW484 (B)
→ ensures continuous system operation
Recommended Related Models
- Yokogawa SPW481 – 100–120 V AC version
- Yokogawa SPW482 – 220–240 V AC version
- Yokogawa SPW482-13 / SPW482-E3 – configuration variants
- Yokogawa SCP401 – communication processor
- Yokogawa SNT series – ESB optical communication modules
Popular Yokogawa Models
- Yokogawa SPW484 – 24 V DC power module
- Yokogawa SPW482 – AC power module
- Yokogawa SCP401 – safety communication processor
- Yokogawa SDV531 – digital output module
- Yokogawa CENTUM VP – DCS platform
