When a machine stops because its power source overheats or drops voltage, production lines grind to a halt and costly downtime follows. The Power Supply delivers a stable 30 V output at up to 4 A, perfect for AS-i modules, sensors and control panels, keeping your equipment running reliably without taking up valuable cabinet space.
Usages of a 120W Power Supply
In a typical automation cabinet the unit snaps onto the DIN rail and powers AS-i-5 or AS-i-3 networks, motor controllers, PLC I/O modules and safety relays. Its compact size lets you fit more functions into the same rack, ideal for test rigs, prototype benches and small manufacturing lines where space is at a premium.
Benefits of BIHL & WIEDMANN Power Supply
- Stable voltage: Keeps your devices running without glitches.
- High efficiency: Saves energy and reduces heat with 89 % performance.
- Built-in protection: Overload and short-circuit safeguards protect your gear.
- Space-saving design: DIN-rail mounting frees up cabinet room.
- Status indicator: Green LED confirms healthy output instantly.
Why Choose BIHL & WIEDMANN Power Supply
Choosing this unit means you avoid the bulk and unreliability of traditional brick-style supplies. Its aluminium housing with a plastic DIN-rail cover provides durability while maintaining a lightweight profile, so installation is quick and maintenance is easy. The wide input range of 100-240 VAC lets you operate worldwide without additional converters, and the low inrush current below 20 A protects your upstream circuits.
The Power Supply also offers excellent temperature tolerance, operating from -25 °C to +70 °C, making it suitable for harsh industrial environments. With push-in terminals that accept 0.2-2.5 mm² wires, wiring is straightforward and secure, reducing installation time and potential errors.
Key Features of a 120W Power Supply
- Input voltage: 100-240 VAC, 1-phase. Wide range lets you use it anywhere.
- Output voltage: 31 VDC (30-31.2 V range). Provides precise power for sensitive equipment.
- Maximum power: 120 W. Handles demanding loads without strain.
- Current limit: 4.5 A (short-circuit proof). Guarantees safe operation under fault conditions.
- Efficiency: 89 %. Low energy waste translates to lower operating costs.
- Ripple: < 30 mVss. Ensures clean power for reliable performance.
- Dimensions (W/H/D): 42 / 127 / 126 mm. Compact size fits tight spaces.
- Weight: 590 g. Light enough for easy handling yet robust.
- Protection rating: IP20. Safeguards against dust and accidental contact.
- Connection type: Push-in terminals (0.2-2.5 mm²). Simple, secure wiring for quick setup.
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) |
