The ABB SD831 delivers regulated 24 VDC power to control modules inside industrial automation cabinets. Engineers specify this unit when compact DIN-rail supplies must feed sensitive I/O hardware. Consequently, the module sustains stable voltage across varying load conditions.
Physical Dimensions and Weight Data
Cabinet depth often dictates how technicians arrange power components along the DIN rail. Therefore, this unit keeps a narrow profile while supporting continuous load demands. It weighs roughly 0.5 kg and measures 115 mm in height. Additionally, its width spans 50 mm with a depth of 125 mm.
Interfaces and Connectivity Features
Reliable power distribution depends on secure terminations at every output point. The unit provides screw terminals that accept wires up to 2.5 mm². Furthermore, front-panel LEDs let technicians verify output status instantly. The housing supports snap-on DIN-rail mounting without additional tools.
Component Count and Energy Storage
Internal architecture shapes both thermal behaviour and service life. This unit carries more than 150 discrete components across its regulation stages. Moreover, bulk capacitors store enough energy to ride through brief input dips. This storage protects downstream modules whenever mains power fluctuates.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Module Type | DIN-rail power supply |
| Dimensions | 115 × 50 × 125 mm |
| Weight | 0.5 kg |
| Mounting | DIN rail (35 mm) |
| Input Voltage Range | 85–264 VAC |
| Output Voltage | 24 VDC regulated |
| Output Power | 60 W |
| Output Current | 2.5 A |
| Component Count | 150+ discrete parts |
| Energy Storage | Bulk capacitors, holdup 20 ms |
| Operating Temperature | -20°C to 70°C |
| Isolation Voltage | 3000 VAC |
| Efficiency | 89% typical |
Load Performance and Compliance
Stable output directly influences overall system reliability. The unit holds voltage regulation within ±1% across full load. Meanwhile, isolation voltage reaches 3000 VAC between input and output circuits. Overvoltage and overcurrent protection prevent damage during fault conditions.
Industrial sites also demand strict safety certifications before deployment. The unit complies with IEC and UL standards for industrial power supplies. In addition, it meets CE requirements for electromagnetic compatibility. These credentials support dependable operation in harsh plant environments.
Details
| Weight | 0.6 kg |
|---|---|
| Dimensions | 180 × 110 × 20 mm |
