Description
ABB SA920N 3BDH000600R1 24V DC Power Supply Module
The ABB SA920N (Article Number: 3BDH000600R1) is a high-reliability power supply module designed for the S900 Remote I/O system. It provides regulated 24V DC power to the termination units and is specifically engineered for use in non-hazardous (safe) areas within the ABB Ability™ System 800xA architecture.
Product Detailed Description
The SA920N acts as the primary power source for S900 I/O racks. It is designed to be mounted on a redundant termination unit, such as the TU921N, allowing for a dual-power setup that ensures system availability even if one power module fails. It converts input voltage into a stable 24V DC signal to power communication interfaces and I/O modules.
Technical Parameters
| Feature | Specification |
| Article Number | 3BDH000600R1 |
| Series | S900 I/O (Type N) |
| Signal Specification | 24 V DC (Range: 19.2 to 32 V DC) |
| Redundancy | Yes (Supported with TU921N) |
| Intrinsic Safety | No (Designed for safe areas) |
| Environmental Protection | G3 coating (Standard) |
| Operating Temperature | -20°C to +60°C |
| Relative Humidity | Max 93% \pm 3% at 40°C |
| Dimensions (H x W x D) | 129 x 47 x 117 mm |
| Weight | 1.6 kg (3.5 lbs) |
Product Advantages
- Hot-Swap Functionality: Integrated disconnection mechanisms allow the module to be replaced during operation without interrupting the primary voltage or system performance.
- Corrosion Resistance: Comes standard with G3 coating (conformal coating), protecting internal components against harsh or corrosive industrial atmospheres (ISA-S71.04).
- Enhanced Diagnostics: Features automated self-diagnostics and provides clear alarm signaling in the event of a power failure when used in a redundant configuration.
- System 800xA Integration: Offers seamless configuration and advanced diagnostics via FDT/DTM tools within the ABB 800xA environment.
Important Considerations (Precautions)
- Redundancy Mix Warning: Do not mix the SA920N with the older SA910N modules for redundancy purposes. Always use matching pairs to ensure stable load sharing and failover.
- Installation Area: This is the Type N variant, meaning it is strictly for installation in non-hazardous (safe) areas. For Zone 1 or Zone 2 hazardous areas, the SA920S (Type S) must be used.
- Mounting: Ensure the module is correctly seated and the four switch-on interlock screws are tightened to properly engage the internal electrical connections.
Product Applications
The SA920N is a core component for distributed control systems (DCS) in various sectors:
- Process Automation: Providing stable power for remote I/O stations in chemical, pharmaceutical, or food and beverage plants.
- Water & Wastewater: Powering field communication interfaces in remote pumping stations or treatment facilities.
- Power Generation: Used in control cabinets for balance-of-plant (BOP) systems where high availability is required.
- General Manufacturing: Serving as the power backbone for S900 I/O racks connected to a PROFIBUS DP network.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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