Product Details
Configured for power redundancy and voting execution in 24 VDC distribution networks, the ABB SS822 3BSC610068R1 (SS822 Voter Unit) provides direct physical/electrical execution. It handles dual power supply inputs to ensure uninterrupted continuous operation across critical control loops, preventing system shut downs caused by single-point power source failures through direct diode auctioneering and real-time status supervision.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SS822 3BSC610068R1 |
| Brand | ABB |
| Origin | Sweden |
| Weight | 350 g (0.77 lbs.) |
| Dimensions | 32 mm x 125 mm x 117 mm (1.26 in x 4.90 in x 4.61 in) |
| Operating Temp | 55 deg C max |
| Power Consumption | Heat dissipation: 18 W |
| Module Type | Power Supply Voter Unit |
| Rated Input Current | 2 x 10 A |
| Nominal Input Voltage | 2 x 24 VDC |
| Maximum Input Voltage | 60 VDC |
| Rated Output Current | 10 A (20 A in parallel operation) |
| Maximum Output Current | 25 A (Overload) |
| Output Voltage Drop | 0.85 V typ. at max. current |
| Short Circuit Limit | Max 25 A RMS |
| Supervision Relay | Integrated (Yes) |
| Mounting Spacing | Width: 15 mm (0.59 in), Height: 25 mm (1.00 in) |
Power Supply Redundancy and Backplane Bus Velocity Integration
The ABB SS822 voter unit acts as an essential decoupling component within high-availability control architectures. Designed to seamlessly interface alongside System 800xA rail-mounted power systems, the unit utilizes low-forward-voltage Schottky diode arrays to minimize internal heat dissipation (18 W maximum) while preventing back-feeding into a faulted input supply. Its integrated supervision relay continuously monitors input voltage thresholds, instantly signaling status changes across backplane bus communication velocity networks and I/O channels without introducing latency or deterministic network jitter to the primary CPU controller.
Frequently Asked Questions
Q: What is the maximum current rating when operating two SS822 units or input paths in parallel?
A: The rated output current is 10 A for single-channel operation, expanding up to 20 A when operated in parallel configuration under standard 55 deg C thermal limits.
Q: How does the SS822 indicate a power supply failure on one of its dual inputs?
A: The module contains an integrated supervision relay with dry contacts that toggle state when an input rail drops below operational voltage limits, enabling direct connection to PLC alarm digital inputs.
Q: What is the maximum voltage drop across the SS822 voting module during full load?
A: The typical output voltage regulation drop across internal decoupling components is 0.85 VDC at maximum continuous rated load current.
Field Installation Guidelines
- DIN-Rail Mounting and Thermal Clearance: Mount the SS822 unit vertically onto standard EN 60715 DIN rail (35 mm). Maintain a minimum clearance spacing of 15 mm horizontally between adjacent modules and 25 mm vertically above and below the unit to ensure adequate natural convective air flow for heat dissipation.
- Wiring and Cable Shielding: Utilize copper conductors rated for at least 75 deg C. Strip wire ends according to terminal block specification (typically 7 mm) and torque terminal screws appropriately. Route incoming 24 VDC dual supply cables in separate wire ducts away from high-voltage AC lines or fast-transient switching circuits to avoid induced EMI.
- Grounding and Earth Bonding: Ensure direct metallic contact between the module DIN-rail mounting clip and the grounded backplate. Connect the system protective earth (PE) busbar directly to the panel chassis with low-impedance ground straps.
- Relay Supervision Hookup: Wire the supervision relay contact terminals to a monitored 24 VDC digital input channel on the DCS/PLC I/O rack. Verify contact continuity prior to powering the primary and secondary 24 VDC power supply channels.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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