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Product Overview
The ABB MSR04XI is a high-reliability serial communication module specifically engineered for the ABB Triguard SC300E Distributed Control System (DCS) and Safety Instrumented System (SIS) platform . This dedicated communication board serves as the critical interface between the SC300E system processor and a wide array of external serial devices, including operator workstations, remote terminal units (RTUs), programmable logic controllers (PLCs), intelligent field instruments, and modems . The ABB MSR04XI is the essential “communication bridge” that enables seamless data exchange, program downloads, and system diagnostics across the entire automation network.
The ABB MSR04XI is a 9U high, single-slot printed circuit board designed for installation in the SC300E system chassis, with a mandatory requirement that at least one module be installed in the designated Slot 10 of the main host frame . It is equipped with four independent RS-232-C communication ports (Port 0 to Port 3) that support full-duplex operation at selectable baud rates of 9600 or 19200 bps . Additionally, the ABB MSR04XI features a fifth dedicated diagnostic port for maintenance and troubleshooting purposes . The module’s front and rear panel connection layout provides flexible wiring options, with the front panel facilitating local connectivity and the rear J2 connector enabling permanent field wiring . Its robust industrial design, featuring 1kV optical isolation on all communication channels, ensures reliable operation in electrically noisy environments, making the ABB MSR04XI a critical component for maintaining system integrity in demanding process industries.
Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | ABB MSR04XI |
| Manufacturer | ABB |
| Product Type | Serial Communication Module |
| System Platform | ABB Triguard SC300E DCS/SIS |
| Ordering Code | RK682011-BA |
| Communication Ports | 4 x RS-232-C (Port 0–3, Full Duplex) |
| Diagnostic Port | 1 x Dedicated Diagnostic Port |
| Baud Rates | 9600 or 19200 bps (Port 2/3 must match) |
| Electrical Isolation | 1 kV Optical Isolation (Port 0–3) |
| Power Supply | 24V DC (via SC300E System Backplane) |
| Power Consumption | ≤ 3.5W |
| Module Height | 9U (400 mm) |
| Module Dimensions | 400mm (H) x 397mm (L) x 28mm (W) |
| Weight | Approx. 1.3 kg |
| Mounting Position | Slot 10 (System Host Frame, Mandatory) |
| Fault Tolerance | Single Fault Tolerant (Triple Circuit + Voting) |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
Main Features and Advantages
Triple Modular Redundancy and Single Fault Tolerance: The ABB MSR04XI is built upon a highly reliable architecture that incorporates triple redundant circuitry and a 2-out-of-3 (2-oo-3) voting mechanism . This design ensures that the ABB MSR04XI is single fault tolerant, meaning a failure in one of the three processing branches will not compromise the module’s overall communication function . This level of hardware redundancy is essential for safety instrumented systems and critical control applications where communication integrity is paramount. The front panel indicators display Tx/Rx activity, module health, and online status, enabling rapid fault detection and diagnosis .
Four Independent RS-232-C Communication Ports: The ABB MSR04XI provides four full-duplex RS-232-C communication ports (Port 0 to Port 3) that are optically isolated to 1 kV, protecting the system from ground loops and electrical surges . Port 0 is specifically reserved for connection to the engineering workstation, enabling application software loading, system monitoring, and diagnostics . Ports 1 through 3 can be used to connect a variety of remote serial devices, providing flexibility for system integration. This multi-port architecture allows the ABB MSR04XI to serve as a central communication hub, managing data traffic between the SC300E controller and multiple external systems simultaneously.
