DSSR120 ABB Advant OCS Power Supply Units
Manufacturer: ABB
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Part Number: DSSR120
Condition：New with Original Package
Product Type: Power Supply Units
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB DSSR120 Power Supply Unit
The ABB DSSR120, also cataloged as the DSSR120 DC Power Supply Unit, operates as a dedicated hardware component for direct internal voltage regulation within ABB Advant OCS and MasterPiece 200/200/1 rack architectures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DSSR120 (48990001-LH) |
| Brand | ABB |
| Origin | Sweden |
| Weight | 2059 g (4.54 lbs) |
| Dimensions | Standard rack-mounting envelope |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | Power output capacity up to 100 W |
| Input Voltage | 24 VDC |
| Output Voltage | 5 VDC (regulated) |
| Output Current Capacity | 20 A |
| Fuse Protection | Integrated (10 A spare fuse part number 5672 827-10) |
| Target System Compatibility | ABB Advant OCS, MasterPiece 200 / 200 / 1 |
Backplane Bus Powering & Deterministic I/O Density Scaling
The DSSR120 converts standard 24 VDC plant power into a tightly regulated 5 VDC output rail, supplying steady current up to 20 A directly across the rack backplane bus. High backplane bus communication velocity relies on stable supply voltages to prevent logic-level drops during heavy I/O density scaling. Thermal heat dissipation channels integrated into the chassis preserve internal component ratings, while firmware flash compatibility across backplane processing nodes remains uncompromised by input side voltage fluctuations.
Frequently Asked Questions
Q: How does the DSSR120 protect internal backplane electronics against overcurrent conditions on the primary supply?
A: The module incorporates input line protection utilizing a 10 A fuse (spare part number 5672 827-10) that opens the supply circuit upon detecting sustained overcurrent conditions before backplane voltage degradation occurs.
Q: Can two DSSR120 modules operate simultaneously to support redundant power configurations?
A: Yes. The 5 VDC output stage is engineered to function within redundant power supply schemes on compatible MasterPiece and Advant OCS racks, enabling dual-module parallel feeding for fault-tolerant operation.
Field Installation Guidelines
Mount the DSSR120 directly into its dedicated rack slot within the Advant OCS or MasterPiece enclosure, securing the front retention screws to establish proper mechanical grounding to the rack frame. Connect the incoming 24 VDC field power leads to the designated terminal block, ensuring tight screw clamping to minimize contact resistance. Verify clear vertical space above and below the rack assembly to allow unobstructed thermal convection across the module's cooling vents.