Application Scenarios:

In an automotive manufacturing body shop, hundreds of welding robots, clamp actuators, and photoelectric sensors are controlled by a distributed I/O system. The reliability of the 24V DC control power is non-negotiable; a single glitch can stop the entire production line. The ABB SAM02 R1H ANR27900579 Power Supply​ is mounted on the DIN-rail inside a remote junction box that serves a cluster of welding cells. It converts the plant’s unstable 120V AC supply into a clean, steady 24V DC bus. This bus powers the local ABB remote I/O communication coupler, all connected digital and analog I/O modules, and the solenoid valves for the weld gun tips. Its wide input range tolerates voltage sags common in factories with large spot welders. If this power supply fails, the entire I/O station goes dark, causing a line stoppage. Replacing it with a genuine SAM02 R1H​ unit restores power and communications in minutes, directly addressing the critical pain point of production line availability and minimizing costly downtime.

 

 

Parameter:

Main Parameter	Value / Description
Product Model​	SAM02 R1H​ (Order Code: ANR27900579)
Manufacturer​	ABB
Product Category​	Single-Phase DIN-Rail Switching Power Supply
Input Voltage Range​	Wide range AC input, e.g., 85-264V AC (47-63 Hz), for global compatibility.
Output Voltage​	24V DC, the industry standard for control systems.
Output Current​	Typically 2.0A or 2.5A, providing 48W or 60W of power. (Specific to R1H rating).
Output Power​	40W, 60W, or 120W depending on the specific SAM02 variant.
Efficiency​	High efficiency (>90%), reducing heat generation and energy costs.
Protections​	Integrated protection against short-circuit, overload, overvoltage, and overtemperature.
Cooling Method​	Convection cooling (fanless) for high reliability and silent operation.
Status Indication​	LED indicator for power-on and output status.
Mounting​	Standard 35mm DIN-rail mountable for easy installation in control panels.
Safety & EMC​	Complies with international standards (e.g., UL, cUL, CE) for safety and electromagnetic compatibility.

 

 

 

Technical Principles and Innovative Values:

The ABB SAM02 R1H ANR27900579​ is engineered to be the quiet, reliable backbone of control panel power in electrically noisy environments.

• Innovation Point 1: Advanced Thermal Management & Fanless Design:​ A key differentiator is its optimized thermal design that allows for full power output without a cooling fan. By using high-efficiency components and an intelligent heatsink design integrated into the casing, the SAM02 R1H​ dissipates heat effectively through convection. This eliminates the most common point of failure in power supplies—the fan—resulting in significantly higher mean time between failures (MTBF), silent operation, and immunity to dust clogging, making it ideal for harsh industrial environments.
• Innovation Point 2: Exceptional Immunity to Industrial Electrical Noise:​ The power supply is specifically hardened for the industrial floor. It features robust input filtering that suppresses line-borne disturbances (surges, dips, EFT) and rigorous output filtering that ensures a clean DC output even when connected to inductive loads like solenoid valves and contactor coils. This high noise immunity prevents nuisance resets of sensitive electronics like PLCs and communication modules, which is a critical factor for system stability in plants with heavy motor and drive loads.