Overview
Configured for discrete output signal execution in ABB MasterPiece 200 and Advant OCS platforms, the ABB 48990001-LH (DSSR120 Output Relay Module) provides direct electrical switching and field device interface control.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DSSR120 |
| Brand | ABB |
| Part Number | 48990001-LH |
| Product Type | Output Relay Module |
| Origin | Sweden |
| Weight | 1.35 kg |
| System Compatibility | ABB MasterPiece 200 / Advant OCS Series |
| Signal Function | Discrete output signal processing and relay interface |
| Installation Method | ABB control system subrack mounting |
| Cooling Method | Natural convection |
| Enclosure Rating | IP20 cabinet installation |
Industrial Control Bus and I/O Interface Characteristics
The ABB DSSR120 operates as an output interface component within ABB PLC and DCS architectures. It receives control commands from the system controller and transfers electrical switching signals to connected field devices.
Moreover, the module follows ABB industrial control hardware design principles, including backplane bus communication compatibility, I/O density scaling within configured racks, and firmware flash compatibility with supported system environments. The module separates control-side electronics from external circuits through electrical interface design.
The DSSR120 supports connection to field devices such as actuators, solenoid valves, contactors, and status indicators. Therefore, correct rack addressing, terminal wiring, and grounding practices are required during system integration.
Frequently Asked Questions
Q: Is the ABB DSSR120 designed for direct connection to high-power field loads?
A: The DSSR120 functions as an output interface module. External field circuits must remain within the electrical ratings defined by the installed ABB system configuration and connected interface equipment.
Q: Does the DSSR120 support hot-swap replacement during system operation?
A: Available documentation does not confirm hot-swap capability. Maintenance personnel should follow ABB system shutdown and module replacement procedures before removing the module.
Q: What installation conditions are required for the DSSR120?
A: The module requires installation inside a compatible ABB control cabinet or subrack with proper grounding, ventilation clearance, and signal cable routing.
Field Installation Guidelines
- Install the DSSR120 only in the specified ABB MasterPiece 200 or Advant OCS hardware rack positions.
- Verify module orientation and mechanical locking before applying system power.
- Separate signal wiring from high-voltage power cables to reduce electromagnetic interference.
- Connect cabinet protective grounding according to the control system grounding design.
- Inspect terminal connections for correct polarity and secure mechanical fastening.
- Confirm controller configuration and I/O addressing before returning the system to operation.
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