Product Description
ABB Voting Units SS823 and SS832
The SS823 and SS832 Voting Units are purpose-built components designed to ensure high-integrity and reliable operation in redundant power supply configurations. These units manage power redundancy by supervising input voltages, providing overvoltage protection, and generating supervision signals for connected power consumers.
Key Features and Benefits
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Redundant Power Supply Management:
- Ensures seamless operation by separating and supervising inputs from two power supplies.
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Overvoltage and Circuit Protection:
- Features double overvoltage protection circuits on both inputs.
- Detects short and open circuits in the voting element.
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Supervision and Indication:
- Green LEDs on the front panel indicate correct voltage delivery.
- Includes voltage-free supervision relays for external monitoring.
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High Safety Standards:
- Certified for SIL3 according to IEC 61508.
- Suitable for SELV and PELV applications.
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Ease of Installation:
- Simple DIN-rail mounting with robust latching.
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Industrial Compliance:
- G3 compliant for corrosive environments.
- Approved for use in ATEX Zone 2 and marine-certified environments.
Technical Specifications
| Attribute | Details |
|---|---|
| Article Number | 3BSE038226R1 |
| Type | Voter and Over Voltage Protection |
| Rated Output Current | 20 A |
| Rated Input Voltage | 1x24 V d.c. |
| Maximum Output Current | 35 A (Overload) |
| Power Dissipation | 24 W at 20 A; 6 W at 5 A |
| Output Overvoltage Protection | < 30 V |
| Voltage Regulation | Output voltage 1.2 V lower than input |
Environmental and Certification Details
| Attribute | Details |
|---|---|
| Operating Temperature | 0 to +55 °C (+32 to +131 °F) |
| Storage Temperature | -40 to +70 °C (-40 to +158 °F) |
| Relative Humidity | 5–95% (non-condensing) |
| Corrosion Protection | ISA-S71.04: G3 |
| Pollution Degree | Degree 2 (IEC 60664-1) |
| Ingress Protection | IP20 (IEC 60529) |
| Compliance | - CE Marking |
| Hazardous Location Approvals | - ATEX Zone 2
| - Marine Certifications (ABS, BV, DNV-GL, LR)|
Mechanical Details
| Attribute | Value |
|---|---|
| Width | 116 mm (4.6 in.) |
| Height | 132 mm (5.3 in.) |
| Depth | 145 mm (5.8 in.) |
| Weight | 870 g (1.9 lbs.) |
| Mounting Spacing | - W: 15 mm (0.59 in.) |
Applications and Use Cases
The SS823 and SS832 Voting Units are ideal for:
-
Redundant Power Supply Systems:
- Ensures consistent and reliable power delivery.
-
Safety-Critical Applications:
- Certified for SIL3, suitable for high-integrity systems.
-
Corrosive and Harsh Environments:
- G3 compliance makes it resistant to corrosive atmospheres.
-
Industrial Automation Systems:
- Designed to work seamlessly with AC 800M High Integrity Controllers and S880 High Integrity I/O systems.