Description
Product Overview
The ABB SD812F power supply module, order number 3BDH000014R1, is designed for ABB Freelance AC 800F controller configurations using PM 802F or PM 803F processor modules. Unlike a conventional 24 VDC cabinet power supply, the SD812F accepts redundant 24 VDC inputs and generates the regulated low-voltage rails required by the controller hardware. Its documented outputs are 5 VDC at up to 5.5 A and 3.3 VDC at up to 6.5 A, with a maximum combined output power of 35 W. ABB’s Freelance product catalog specifies Freelance software version V7.1 SP2a or later for the stated application.
The module’s redundant input arrangement supports continuity when one input supply is lost, provided the installation is correctly wired and the alternate supply remains within its permitted range. ABB documents an input range of 19.2–32.5 VDC, an input current of 1.7 A at nominal load, and rated input power of 41 W. When input power fails for at least 5 ms, the module generates a power-fail signal for the CPU. Its output rails remain within their tolerance limits for at least another 15 ms, contributing to more than 20 ms of overall power-failure bridging under the specified conditions. These functions help the controller execute a controlled shutdown rather than experience an uncontrolled loss of logic power.
When sourcing an ABB SD812F, verify the complete ordering number and the installed controller configuration. Do not substitute a standard 24 VDC, 3 A power supply merely because the input voltage appears similar: the SD812F provides different internal output rails and controller-specific power-failure signaling. Before replacing a unit, check the condition of both redundant input feeds, output loading, controller diagnostics, and associated hardware. For used or refurbished stock, request photographs of the actual module, a written condition statement, and test evidence relevant to the intended AC 800F configuration.
Product Introduction
The SD812F serves as a power subsystem within the AC 800F controller architecture. Its principal job is to supply the controller’s internal electronics with regulated 5 VDC and 3.3 VDC power. The module also monitors power conditions and provides a power-fail signal used by the CPU to support an orderly response to supply loss. It is therefore a controller-specific component, not a general-purpose 24 VDC output supply for field instruments.
For replacement planning, confirm the processor model, installed Freelance software version, input wiring, and actual output demand. Inspect the module and its connectors for signs of heat damage, contamination, or mechanical wear. Before installation, isolate the relevant supplies according to site procedures and verify that the redundant feeds are correctly configured. After replacement, check the module status indicators and controller diagnostics, then confirm normal startup and application operation using the approved commissioning procedure.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model | SD812F / SD 812F |
| Ordering number | 3BDH000014R1 |
| Product type | Controller power supply module |
| System platform | Freelance AC 800F |
| Supported processor configurations | PM 802F / PM 803F |
| Required software | Freelance V7.1 SP2a or later |
| Input voltage | 24 VDC nominal |
| Input configuration | Two redundant inputs permitted |
| Permitted input range | 19.2–32.5 VDC |
| Input current at nominal load | 1.7 A at 24 VDC |
| Rated input power | 41 W |
| Output 1 | 5 VDC ±3%, 0.5–5.5 A |
| Output 2 | 3.3 VDC ±3%, 0.5–6.5 A |
| Maximum total output power | 35 W |
| Current limit | Approximately 7.5 A |
| Power-failure bridging | More than 20 ms under specified conditions |
| Input fuse | 3.15 AT per supply, soldered |
| Weight | Approximately 0.46 kg |
Specifications are based on ABB’s Freelance product catalog and supporting technical documentation.
SD812F
Related Products
The following components are relevant when checking the ‘s application. They are not automatic substitutes.
- PM 802F — ABB AC 800F processor configuration identified for use with the .
- PM 803F — Another supported processor configuration identified in ABB documentation.
- SD 812F Z variant — A G3-compliant coated variant is referenced in ABB’s catalog; confirm the exact order code before specifying it.
- SD 802F — A different AC 800F power supply model; compare its documented output capability and compatibility before considering replacement.
Frequently Asked Questions
Q1: What is the ABB used for?
It supplies regulated 5 VDC and 3.3 VDC rails for supported ABB AC 800F controller configurations, including those using PM 802F and PM 803F processors.
Q2: Does the accept 24 VDC input?
Yes. ABB specifies two redundant 24 VDC inputs, with a permitted range of 19.2–32.5 VDC.
Q3: What are the output ratings?
The module provides 5 VDC at up to 5.5 A and 3.3 VDC at up to 6.5 A. The maximum combined output power is 35 W.
Q4: Can it be replaced with a standard 24 VDC power supply?
Not as a direct substitution based on input voltage alone. The provides controller-specific output rails and power-failure signaling. Any alternative requires documented electrical and system-level compatibility.
Q5: What happens when the input supply fails?
The module generates a power-fail signal when the input power loss meets the documented threshold. Its output rails remain within tolerance for at least another 15 ms, providing more than 20 ms of total bridging under specified conditions.
Q6: What should be verified before ordering?
Check the 3BDH000014R1 ordering number, processor configuration, software version, input wiring, and the supplied unit’s condition. If the installation requires a coated variant, verify that designation separately.
Q7: What testing evidence should accompany a refurbished unit?
Request actual-unit photographs, confirmation of the part number, a written condition report, and test results covering input operation, both output rails, status indication, and relevant fault behavior. A basic power-on check alone does not establish full compatibility with the installed controller.
Procurement Recommendation
The ABB is a controller-specific power supply whose correct output rails and power-failure behavior matter as much as its 24 VDC input. Before purchase, confirm the controller model, software requirement, and complete part number. Check that the replacement can meet the existing load and that both redundant input feeds are correctly configured.
For critical control applications, request documented inspection or test results, the unit’s condition and revision details, warranty terms, and a confirmed lead time. After replacement, verify both output rails and controller diagnostics, then complete the site’s approved startup and functional checks before returning the system to service.
