SAMSUNG SMPS-08 Rack Power Module
SAMSUNG SMPS-08 Rack Power Module
The SAMSUNG SMPS-08 is a heavy-duty rack power supply module engineered specifically for Samsung SPC and SM-series PLC system baseplates. It steps down primary AC/DC plant power to regulated DC logic voltages required by the central processing unit (CPU), I/O modules, and peripheral communication cards across the backplane bus. Designed for high reliability in harsh industrial environments, the SMPS-08 ensures continuous, noise-free operational power to prevent unexpected system resets and controller downtime.
Technical Parameter List
| Parameter | Specification |
| Model | SAMSUNG SMPS-08 |
| Input Voltage Range | 85–264V AC (Universal Wide Input) / 110–300V DC |
| Input Frequency | 47–63 Hz |
| Rated Output Power | 40W (System Backplane Total Capacity) |
| Output Voltages | 5V DC (Backplane Logic) / 24V DC (Field/Sensor Auxiliary Power) |
| Output Current | 5V DC @ 5.0A / 24V DC @ 0.8A |
| Efficiency | > 82% at full load |
| Overcurrent Protection | > 110% of rated capacity (Auto-recovery / Hiccup mode) |
| Overvoltage Protection | 5.5V–6.5V DC (5V rail latching shutdown) |
| Hold-up Time | ≥ 20 ms at 220V AC rated input |
Product Features / Core Advantages
Universal Power Input: Wide-range AC/DC input accommodates global grid fluctuations and utility voltage drops without dropping system power.
Integrated Dual Output: Provides both regulated 5V DC for backplane bus integrated circuits and auxiliary 24V DC for external sensors and field contacts.
Comprehensive Electrical Protection: Onboard short-circuit, overvoltage, overcurrent, and thermal overload protection safeguard downstream CPU and high-value I/O modules.
Low EMI & High Noise Rejection: Internal switching filter and isolation transformer prevent line noise and voltage spikes from propagating to the PLC backplane.
Front Panel Diagnostics: LED status indicators provide immediate visual feedback on power health (POWER OK / ALARM).
Model Classification & Power Series
| Model | Input Voltage | Output Power / Capacity | Target Rack Size |
| SMPS-08 | 85–264V AC / 110–300V DC | 40W (5V DC / 24V DC) | Standard 8-Slot Base Rack |
| SMPS-04 | 85–264V AC | 25W (5V DC / 24V DC) | Compact 3-Slot / 5-Slot Racks |
| SMPS-08D | 18–32V DC (DC Input) | 40W (5V DC / 24V DC) | DC-Powered / Substation Racks |
| SMCU-CPU | N/A | Main System Controller | Powered by SMPS Series |
Environmental Tolerance Conditions
Operating Temperature: 0°C to +55°C (32°F to 131°F)
Storage Temperature: -25°C to +70°C (-13°F to 158°F)
Relative Humidity: 5% to 95% RH (non-condensing)
Vibration Immunity: IEC 60068-2-6 compliant (10–57 Hz @ 0.075 mm amplitude, 57–150 Hz @ 1g)
Dielectric Withstand Voltage: 1500V AC for 1 minute between primary terminals and frame ground (FG)
Atmospheric Environment: Free from corrosive gases, flammable vapors, and excessive conductive dust
Installation Method
Power Isolation: Verify that the primary AC/DC power mains are isolated and locked out before installation.
Rack Position: Always install the SMPS-08 power module into the leftmost slot (Slot 0) of the Samsung SPC/SM baseplate.
Mechanical Locking: Slide the module top guide hook into the baseplate notch, pivot downward until the backplane connector seats completely, and tighten the top/bottom retaining screws.
Protective Earth (FG): Connect a heavy-gauge copper wire (minimum 2.0 mm²) from the FG (Frame Ground) terminal directly to the central control cabinet ground bar.
Operating Instructions
Wiring: Connect primary power lines to L (Line) and N (Neutral) terminals. Maintain separate conduits for primary AC input cables and DC field signal cables.
Power-On Sequence: Once wired, apply power. Verify that the green POWER LED illuminates steady.
Auxiliary Power Limits: Do not exceed the 0.8A rating on the 24V DC field terminal block to prevent thermal tripping of the internal supply.
Maintenance Check: Check terminal block screw tightness every 6–12 months in high-vibration applications to avoid resistive heating.