The Stahl Series 9143 is a robust Ex i power supply designed for hazardous areas, ensuring the intrinsically safe operation of three- or four-conductor transmitters, solenoid valves, light barriers, and controllers. This automation interface solution operates with a nominal voltage range of 12.50 V to 14.70 V and an output current of 140.00 Ma at 4.0 W power. It features an auxiliary power input accommodating 20 to 28 VAC or 18 to 35 VDC and can reliably function in temperatures ranging from -20 deg C to +70 deg C. With an IP30 rating and suitability for installation in zone 2 environments, this device guarantees stable, adjustable output voltage. The Series 9143 comes with international certifications for global application within the hazardous area category, making it a versatile choice for engineers seeking reliable power solutions in challenging conditions.