Siemens AS-i Interface power supply unit, 120V/230VAC, 3A Part number 3RX9501-0BA00

Product Overview

Siemens AS-Interface Power Supply Unit, 120/230 V AC → 30 V DC, 3 A, IP20 (3RX9501-0BA00) provides a regulated 30 V DC supply for AS-Interface (AS-i) networks. It converts standard mains voltage to the stable low-voltage DC required by AS-i slaves and sensors. With built-in ground-fault detection, overload protection and power-decoupling for AS-i data and power, the unit ensures reliable and safe supply to AS-i field devices in automation installations.

Key Features

• Input: 120 V or 230 V AC, wide input range for flexibility
• Output: 30 V DC (AS-i bus voltage), rated 3 A output current
• SMPS-type regulated supply — efficient power conversion (~84 % efficiency)
• Integrated ground-fault detection and overload protection — improves safety and reliability
• Spring-loaded terminals for both input and AS-i output — ease of wiring and maintenance
• DIN-rail mounting (standard 35 mm rail) — convenient installation in control cabinets
• Compact build: approx. 50 mm width × 125 mm height × 125 mm depth — space-efficient for panel design
• Suitable for AS-Interface networks — powers AS-i slaves, sensors and actuators from a single supply unit

Technical Specifications

• Article Number: 3RX9501-0BA00
• Type: AS-Interface Power Supply Unit (3A / 30V DC)
• Input Voltage (AC): 120 / 230 V AC (wide tolerated range: 85–132 V or 176–253 V AC)
• Input Frequency: 50 / 60 Hz
• Output Voltage (DC): 30 V DC (AS-i bus output) — floating output per AS-i specification
• Output Current (Rated): 3 A
• Output Capacity / Load: Suitable to power typical AS-i networks and connected slaves/sensors
• Mains Buffer Time: ≥ 20 ms — helps ride through brief voltage dips without supply disruption
• Protection & Diagnostics: Ground-fault detection, overload detection, status LEDs for supply and fault indication
• Mounting: DIN-rail snap-on (35 mm rail) — quick installation and removal
• Connection Terminals: Spring-loaded terminals for input and output (wire range ~0.2–2.5 mm²) — secure & flexible wiring
• Protection Class / Housing Rating: IP20 — for indoor control-cabinet use
• Operating Ambient Temperature: –10 °C to +70 °C (typical industrial ambient range)
• Dimensions (WxHxD): 50 mm × 125 mm × 125 mm
• Weight (Net): approx. 0.54 kg

Applications

The 3RX9501-0BA00 is intended for powering AS-Interface bus networks — commonly used in industrial automation for distributed I/O, sensors, actuators and safety devices. Typical use-cases include factory automation lines, conveyor controls, building automation, distributed sensor networks, decentralized I/O stations and any installation requiring a stable, standards-compliant AS-i supply. Its compact DIN-rail design and integrated protections make it a reliable central power source for AS-i bus segments within control panels or switch cabinets.