ABB DSSR122 Advant Master Power Supply Unit

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

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