Description
The ABB SD812F (Part number 3BDH000014R1) is a high-reliability power supply module designed specifically for the Freelance Distributed Control System (DCS). It serves as the primary 24V DC power source for Freelance controllers (such as the AC 700F, AC 800F, or AC 900F) and their associated I/O modules.
Product Parameters (Datasheet)
- Model Number: SD812F
- Part Number: 3BDH000014R1
- Input Voltage: 115V AC / 230V AC (Auto-ranging or switchable)
- Output Voltage: 24V DC
- Output Current: 10A (Continuous)
- Output Power: 240W
- Efficiency: > 90% (Typical)
- Mounting: 35mm DIN rail mounting
- Redundancy: Built-in diode for parallel/redundant operation
- Protection: Overload, short-circuit, and overvoltage protection
ABB SD812F 3BDH000014R1
ABB SD812F 3BDH000014R1
ABB SD812F 3BDH000014R1
Country of Origin
The SD812F is manufactured by ABB in Germany. It is engineered to meet the strict quality and durability requirements of European industrial automation standards.
Application Fields
The SD812F is the standard power solution within the Freelance system architecture:
- Controller Power: Providing stable, filtered 24V DC to AC 800F and AC 900F processor units.
- I/O Power: Supplying field power to S700, S800, and S900 remote I/O stations.
- Network Components: Powering Ethernet switches, gateways, and fieldbus couplers within the control cabinet.
- Critical Utilities: Used in water treatment, small power plants, and chemical batching where DCS uptime is critical.
Product Usage Instructions
- Mounting: Clip the module onto a standard 35mm DIN rail. Ensure at least 50mm of clearance above and below the unit for proper natural convection cooling.
- Input Wiring: Connect the AC mains (L, N, and PE) to the input terminals. Always ensure the protective earth (PE) is connected to a low-impedance ground point.
- Redundancy Setup: To increase system reliability, two SD812F units can be connected in parallel. Their built-in decoupling diodes prevent a single unit’s failure from shorting the entire 24V DC bus.
- Monitoring: Connect the “DC OK” dry contact to a digital input on your PLC or DCS. This allows the system to generate an alarm in the HMI if the power supply fails.
- Voltage Adjustment: If your application has long cable runs causing a voltage drop, use the front-panel potentiometer to slightly increase the output voltage (typically up to 28V DC).
Product Technical Description
The SD812F is a switch-mode power supply (SMPS) technically optimized for the noise-sensitive environment of a DCS. It features a very low ripple voltage to ensure that analog signals and communication links are not disturbed by electrical interference. Unlike standard commercial power supplies, the SD812F is designed for high “Holdup Time,” meaning it can maintain its output for several milliseconds during a momentary AC power dip, giving the controller time to perform a controlled shutdown or ride through the disturbance.
Q&A (Common Questions)
Q: Can I use a standard third-party 24V 10A power supply instead? A: While possible, the SD812F is specifically tested for EMC compatibility with Freelance hardware and includes the necessary decoupling diodes for redundancy which standard units often lack.
Q: What is the meaning of the “F” suffix in the model name? A: The “F” signifies that the module is part of the Freelance family, ensuring mechanical and electrical compatibility with the Freelance rail and bus system.
Q: How do I know if the unit is overloaded? A: The front panel features a “DC OK” LED. If this LED turns off or begins to flicker, it indicates that the load has exceeded 10A or that the internal temperature has become too high.
Q: Is the SD812F suitable for hazardous areas? A: The SD812F is generally intended for installation in a “Safe Area” cabinet. If the field devices are in a hazardous area, they should be connected via appropriate intrinsic safety barriers.
Similar Model Recommendations
- ABB SD811F (5A version for smaller loads)
- ABB SD802F (Related power module variant)
- ABB SA811F (Fieldbus power supply)
- ABB CP-C.1 24/10.0 (Modern ABB universal power supply alternative)
- ABB AC 800F (Standard controller powered by this unit)
For technical support or to procure the ABB SD812F 3BDH000014R1, please contact our Freelance DCS technical team.
