Reliable Power Delivery and System Protection Features
This power supply module provides stable DC power to connected field instruments and control modules. It converts an AC input voltage into multiple regulated DC output rails for system operation. The Yokogawa AMM42 S4 delivers 5 V DC at 3 A and 24 V DC at 1.5 A simultaneously. Each output features independent overcurrent and overvoltage protection circuits for enhanced safety. The module achieves a typical efficiency of 85% across its full load range. It incorporates soft-start circuitry to prevent inrush current during power-up sequences.
Mechanical Construction and Mounting Dimensions
The unit measures 140 mm in height, 80 mm in width, and 150 mm in depth. It weighs approximately 1.2 kg with all mounting brackets and terminal covers attached. The AMM42 S4 secures onto a standard 35 mm DIN rail using the integrated locking mechanism. Its heavy-duty steel enclosure provides excellent thermal dissipation and mechanical rigidity. This robust construction ensures long-term reliability in harsh industrial environments.
Connectivity Options and Interface Specifications
Front-facing screw terminals accommodate all AC input and DC output wiring connections. The Yokogawa AMM42 S4 includes a dedicated ground terminal for safety earth bonding. Remote sensing terminals enable precise voltage regulation at the load points. LED indicators display input presence, output status, and fault conditions clearly. A manual reset button allows quick recovery from overcurrent trip events. These features simplify installation and ongoing system management.
Internal Components and Energy Storage Capacity
The internal PCB houses a high-frequency switching transformer and MOSFET switching devices. Primary-side filtering uses a 680 µF electrolytic capacitor for input ripple suppression. The AMM42 S4 employs secondary-side synchronous rectification for improved efficiency. Output filtering includes 1000 µF capacitors on each DC rail for stable voltage delivery. A 47 µF capacitor provides auxiliary energy for control circuit operation during brief interruptions. The module also contains thermal sensors that trigger fan operation at high temperatures.
| Parameter | Specification |
|---|---|
| Model | AMM42 S4 |
| Type | Power Supply Module |
| Input Voltage | 100–240 V AC, 50/60 Hz |
| Output 1 | 5 V DC / 3.0 A |
| Output 2 | 24 V DC / 1.5 A |
| Efficiency | 85% (typical) |
| Output Protection | Overcurrent, overvoltage, short-circuit |
| Ripple & Noise | ≤50 mV p-p (5 V), ≤100 mV p-p (24 V) |
| Hold-up Time | 20 ms at full load |
| Dimensions (H×W×D) | 140 × 80 × 150 mm |
| Weight | 1.2 kg |
| Operating Temperature | –10 to +60 °C |
| Storage Temperature | –25 to +85 °C |
| Cooling | Convection with temperature-controlled fan |
| Input Capacitor | 680 µF |
| Output Capacitor | 1000 µF per rail |
| Control Capacitor | 47 µF |
| Terminals | Screw-type for AC and DC connections |
Installation Recommendations for Optimal Performance
Mount the Yokogawa AMM42 S4 in a vertical orientation to maximize natural convection cooling. Maintain at least 50 mm clearance above and below the module for proper airflow. Connect the AC input through a dedicated circuit breaker for overcurrent protection. Use appropriately sized cables based on the output current ratings specified. Verify all output voltages with a multimeter before connecting any load devices. Perform an annual inspection to clean dust from the ventilation grilles.
Details
| Weight | 1.2 kg |
|---|---|
| Dimensions | 140 × 80 × 150 mm |
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