Description
Providing stabilized backplane logic power, the ABB DSSR122 functions as a high-capacity power supply module within the legacy Advant Master (Advant OCS) control system architecture. This module is engineered to accept a primary input range of 18V to 30V DC and convert it into a highly regulated 5V DC output rated at up to 40A. Built to withstand the electrical rigors of heavy industrial processes, the hardware delivers consistent, low-ripple power directly to the rack backplane to ensure continuous operation of processing units and communication interfaces.
Key Features
-
High Current Output: Delivers continuous 5V DC logic power at 40A to support dense multi-module configurations.
-
Wide DC Input Tolerance: Operates reliably across a fluctuating 18V to 30V DC input window, mitigating standard main-line voltage drops.
-
System Integration: Native mechanical and electrical compatibility with the ABB Advant Controller rack assemblies.
-
Rugged Enclosure: Industrial-grade metal housing designed for effective passive heat dissipation and structural protection.
Applications
- ABB Advant Controller 410 (AC410) and Advant Controller 450 (AC450) process control stations.
- Centralized cabinet installations requiring high-amperage 5V DC logic feeds.
- Continuous process industries including paper mills, power generation, and chemical refinement plants.
Technical Specifications
| Parameter |
Specification Value |
| Manufacturer |
ABB |
| Model Number |
DSSR122 |
| Control Series |
Advant Master (Advant OCS) |
| Product Type |
Power Supply Unit |
| Input Voltage Range |
18 - 30 V DC |
| Output Voltage |
5 V DC |
| Output Current |
40 A |
| Lifecycle Status |
Phase-Out / Legacy Spare Part |
| Commodity Code |
85044095 |
| Weight |
2.40 kg |
| Dimensions (W x H x D) |
102 mm x 152 mm x 279 mm |
Empirical Engineering Insights
Alternative Models & Compatibility
The DSSR122 acts as a direct-replacement power assembly. Ensure that physical backplane guides and dynamic sub-rack keying elements are aligned correctly with the unit chassis prior to insertion to prevent guide-pin damage on older OCS backplanes.
Application Pitfalls & Engineering Notes
Under a full 40A load, backplane contact resistance must be minimized. Oxidation on aging rack connectors can cause high-resistance points, leading to local voltage drops and thermal stress. Clean the backplane contacts with approved non-residue contact cleaners during standard maintenance cycles.
Commissioning & Wiring Tips
To accommodate the primary input current draw under peak startup conditions, ensure that the feeding 24V DC cabling is correctly dimensioned to prevent transient voltage sags. Use multi-strand copper conductors with correct ferrule terminations at the terminal block.
Installation Guidelines
CRITICAL WARNING
Isolate and lock out all primary and secondary DC supply sources before attempting mechanical installation or removal of this unit. High-current arcing hazard exists at the backplane interfaces when mounting under live electrical loads.
1
Inspect the card-edge backplane connectors on the DSSR122 for bent contacts, debris, or dust accumulation.
2
Align the module carefully with the sub-rack card guides, pushing the assembly firmly into place until the front locking mechanism is fully engaged.
3
Connect the input wires to the designated primary power terminals, verifying correct polarity (18-30V DC input).
4
Energize the primary source and measure output logic levels at the terminal monitoring points to verify stable 5V DC delivery.