ABB SS855 2PAA125624R1 Power Supply Voting Unit
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | ABB |
| Model | SS855 |
| Ordering Number | 2PAA125624R1 |
| Product Type | Power Supply Voting Unit / Redundancy Voter |
| Application | Redundant Power Supply Systems |
| Input Channels | 2 |
| Output Channels | 1 |
| Input Decoupling Technology | MOSFET |
| Rated Input Current | 2 × 20 A |
| Rated Output Current | 40 A |
| Input Voltage Range | 2 × 8.4–36.4 V |
| Maximum Output Current | 65 A for up to 5 seconds |
| Load Sharing | Two SS855 units can be used in parallel for 40 A redundant voting |
| Heat Dissipation | 1.7 W at 2 × 10 A; 5.9 W at 2 × 20 A |
| Secondary Short-Circuit Current | Maximum 26 A RMS |
| Power OK Signal | Not provided on SS855 |
| Supervision Relay | No |
| Mounting | DIN rail |
| Protection Rating | IP20 |
| Operating Temperature | -40 °C to +70 °C, with linear derating from 60 °C to 70 °C |
| Safety / Certification | UL508, CE, ATEX Zone 2, IECEx Zone 2, Hazardous Location Class I Div. 2 |
| EMC | EN 61000-6-4 and EN 61000-6-2 |
| Mechanical Operating Conditions | IEC 61131-2 |
| Corrosive Atmosphere | ISA-S71.04 G3 |
| Input Terminal Location | Bottom |
| Output Terminal Location | Top |
| Dimensions | 127 × 36 × 124 mm |
| Weight | 0.28 kg |
FAQ
1. What is the ABB SS855 2PAA125624R1 used for?
The ABB SS855 is a power supply voting unit designed to build redundant DC power supply systems. It has two input channels and one output channel, allowing two power supply sources to feed a common load through a decoupled power path. This configuration helps maintain power availability for industrial control and automation equipment when redundant power supplies are required.
2. How many power supply inputs can be connected to the SS855?
The SS855 provides two independent input channels, each rated for 20 A. The two input paths are decoupled using MOSFET technology, allowing the unit to combine redundant power sources while reducing the possibility of a fault on one input directly affecting the other power source.
3. What is the rated output current of the ABB SS855?
The rated output current of the SS855 is 40 A. The unit can handle a maximum output current of 65 A for up to 5 seconds under the specified conditions. When designing the power system, the continuous load current, power supply capacity, ambient temperature and required derating should all be considered.
4. Can two ABB SS855 units be used for a 40 A redundant power supply system?
Yes. ABB specifies that two SS855 units can be used together for redundant 40 A power supply configurations, typically with two 40 A power supplies and two SS855 voting units. This arrangement provides a higher-capacity redundant architecture while maintaining separate power paths for the redundant sources.
5. Does the SS855 provide a Power OK monitoring signal?
No. The SS855 itself does not provide a Power OK signal or supervision relay. For power-status monitoring, the Power OK signals available from compatible ABB power supply units such as SD834, SD853 or SD854 can be used instead. This allows the control system to monitor the operating status of the upstream power supplies.
6. What is the function of MOSFET decoupling in the SS855?
The two input channels of the SS855 are decoupled using MOSFET technology. The decoupling prevents the two redundant power sources from directly feeding back into each other and helps isolate a fault or voltage problem on one input path. This is an important part of maintaining proper redundancy in the DC power distribution system.
7. What should be checked if the load loses power through an ABB SS855 system?
First check both incoming power supply voltages and confirm that each input is within the specified 8.4–36.4 V range. Then inspect the input and output wiring, terminal connections, load current and the status of the upstream power supplies. Because the SS855 does not have its own Power OK signal, the diagnostic signals from compatible power supply units should also be checked when troubleshooting an intermittent or complete loss of output power.
8. What installation conditions should be considered for the ABB SS855?
The SS855 is designed for DIN-rail mounting and has an IP20 protection rating, so it should normally be installed inside a suitable control cabinet or protected electrical enclosure. The specified ambient operating range is -40 °C to +70 °C, with output-current derating required between 60 °C and 70 °C. Proper ventilation, conductor sizing, terminal tightening and separation from excessive heat sources should be considered when installing the unit in a high-current redundant power system.
ABB SS855 2PAA125624R1 Power Supply Voting Unit is in stock. Please contact us for a quick quote and competitive pricing.
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Company Introduction
Xiamen Shengruite Trading Co., Ltd. is a company specializing in the supply of industrial PLC spare parts.
We provide high-quality PLC spare parts to customers in the global manufacturing, energy and power, chemical and other fields.
Since its establishment in 2011, after 13 years of rapid development, the cumulative global shipments have reached 223,650 pieces, with an annual output value of US$50 million.
Successfully served more than 500 customers in more than 100 countries and regions including Saudi Arabia, UAE, the United States, Europe, Africa, and Southeast Asia
Our Mission
Provide customers with the best quality PLC spare parts and the fastest delivery service to ensure that their industrial automation systems are always in the best operating condition.
We provide a 1-year warranty service, and we support returns and exchanges for any issues to ensure your rights and interests are fully protected.
We can provide detailed product images upon request, and our team can arrange warehouse photos for confirmation to ensure you have all the information you need before making a purchase.
Shipping times vary depending on your location. With the support of our 16 global warehouses, we strive to deliver orders as quickly as possible. Contact us to get an estimated delivery time for your specific location.
The minimum order quantity (MOQ) is typically one unit. However, for larger orders, please contact us for potential discounts and pricing details.
Yes, we offer competitive pricing for bulk purchases. Please reach out to our sales team with the specifics of your order to receive a custom quote.
We accept various payment methods for wholesale orders, including bank transfers (T/T), letters of credit, and other options upon agreement. For large transactions, please contact us directly for payment terms.
Yes, we offer flexible ordering options for both small and large quantities. Whether youre looking for a single unit or a large batch, we can accommodate your needs.
We occasionally offer promotional discounts for new wholesale customers. Contact us to learn more about any current offers available for first-time buyers.
If you are unsure of compatibility with your existing setup please provide your system details and our support team can verify compatibility prior to purchase.
Returns are accepted within 30 days if the product is unused, unopened, and in its original packaging. Please note that return shipping and associated costs are the buyer\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’s responsibility.
Yes, we offer technical support for the installation and integration of our products. Our team can assist with setup, configuration, and troubleshooting to ensure a smooth installation.
