When a machine stops because its power source overheats or drops voltage, production halts and costs rise. The BIHL & WIEDMANN DIN Rail Power Supply 30V 4A 120W Single Phase Industrial PSU delivers a steady 30 V output, fits neatly on a DIN rail, and keeps your equipment running reliably around the clock.
Why Choose a BIHL & WIEDMANN Power Supply
Unstable voltage can cause errors in sensors, PLCs and motor controllers, leading to costly downtime. This power supply eliminates those fluctuations with high-efficiency conversion and built-in overload protection, ensuring your automation system stays online. Its compact DIN-rail design saves cabinet space while providing a clean, protected power source for demanding industrial environments.
Usages of a 120W Power Supply
Ideal for automation cabinets, the unit powers AS-i networks, motor controllers, safety relays and PLC I/O modules. It also suits test rigs, prototype benches and small production lines where space is limited and a reliable 30 V source is essential.
Benefits of BIHL & WIEDMANN Power Supply
You get a stable 30 V output that prevents equipment glitches, while the 89 % efficiency lowers energy bills and reduces heat. Built-in overload and short-circuit protection safeguard your devices, and the green LED gives an instant visual check of healthy voltage. The aluminium housing with plastic cover adds durability without adding bulk.
Key Features of a 120W Power Supply
- Input voltage: 100-240 VAC, 1-phase. Accepts the full mains range for flexible installation.
- Output voltage: 31 VDC (30-31.2 V range). Provides precise voltage for sensitive electronics.
- Maximum power: 120 W. Handles the full load of typical automation modules.
- Current limit: 4.5 A (short-circuit proof). Prevents damage during fault conditions.
- Efficiency: 89 %. Saves electricity and keeps the unit cool.
- Ripple: < 30 mV ss. Ensures clean power for noise-sensitive devices.
- Inrush current: < 20 A with NTC limiter. Reduces stress on the mains supply.
- Dimensions (W/H/D): 42 / 127 / 126 mm. Fits comfortably on standard DIN rails.
- Weight: 590 g. Light enough for easy handling yet robust.
- Connection: Push-in terminals (0.2 … 2.5 mm²). Simplifies wiring and speeds up assembly.
Specifications
| General |
Article No. |
BW4218 |
| |
Type |
30 V power supply, optimized for ASi-5/ASi-3 |
| |
Protection Rating |
IP20 |
| |
LED Indicator |
Green LED (Uout >28.5 VDC) |
| Input |
Nominal Voltage |
100 ... 240 VAC, 1 phase |
| |
Voltage Range |
85 ... 264 VAC |
| |
Frequency Range |
47 ... 63 Hz |
| |
Nominal Current |
2.30 A at 100 VAC; 1.24 A at 230 VAC |
| |
Internal Fuse |
4 AT |
| |
Inrush Current |
< 20 A, NTC |
| Output |
Nominal Voltage |
31.0 VDC (Range: 30 ... 31.2 VDC) |
| |
Direct Current |
4 A |
| |
Nominal Power |
120 W |
| |
Efficiency (typical) |
89% |
| |
Ripple (typical) |
< 30 mVss |
| |
Current Limitation |
4.5 A (short-circuit proof) |
| Environment |
Ambient Temp |
-25 °C … +70 °C |
| |
Storage Temp |
-25 °C … +85 °C |
| |
Operating Altitude |
max. 2000 m |
| Physical |
Dimensions (W/H/D) |
42 / 127 / 126 mm |
| |
Weight |
590 g |
| |
Housing |
Aluminum, cover plastic (DIN rail) |
| |
Connection |
Push-in terminals (0.2 ... 2.5 mm²) |
