Description
The Reliance Electric 57C554 (also documented under board part number 57554-B or catalog number 0-57554-) is a specialized Remote I/O interface module. It interfaces a localized Shark XL / Shark II I/O rack structure directly to a primary, higher-level AutoMax DCS network backbone. Utilizing an onboard microprocessor alongside custom timing and buffer circuitry, the module coordinates distributed digital and analog signals back to the central processing cluster without standard scan latency degradation.
Commercial and Sourcing Status
- Condition: New Surplus (Original Packaging/Open Box) or Refurbished (Tested)
- Availability: Limited Legacy Inventory
- Warranty: 12-Month Comprehensive Warranty
- Legacy Notice: This component belongs to a legacy platform originally produced by Reliance Electric, with later lifecycle assets held under Rockwell Automation, Baldor, or ABB. Because active production has ceased, plants should manage current stock levels to maintain operational continuity.
- Pricing Note: Spot pricing reflects current global availability limitations. Contact us directly for a firm, non-binding quote tailored to your engineering requirements.
Technical Specifications
| Parameter | Value / Specification |
| Manufacturer | Reliance Electric / ABB / Baldor |
| Module Type | Remote I/O Interface (Shark to AutoMax) |
| Part Number | 57C554 |
| Board Assembly ID | 57554-B / 0-57554- |
| Control Architecture | AutoMax Distributed Control System |
| Logic Bus Current Consumption | 100 mA at 5 V DC (Sourced via backplane) |
| Network Signal Voltage | 12 V DC Regulated (Derived from 24 V DC rack supply) |
| Diagnostic Indicators | 2 x Status LEDs (CPU OK, COM OK) |
| Addressing Hardware | Integrated Rotary Drop Address Selector |
| Connection Port | 1 x Male RJ-type Network Connector (Snub-style) |
| Cooling | Passive Natural Convection |
| Operating Temperature | 0 to +60 °C (+32 to +140 °F) |
System Architecture & Drop Assignment
Microprocessor-Driven Data Buffer
The 57C554 acts as a specialized data handler between the Shark rack expansion bus and the deterministic AutoMax fieldbus network. An internal micro-controller continually sequences local physical I/O registers into high-speed buffer memory, allowing the master AutoMax processor to poll the entire Shark rack configuration as a unified remote drop during its cyclic tasks.
Network Addressing and Configuration
An integrated hardware rotary dial on the module faceplate sets the network Drop Number. Before inserting the module into a live sub-rack assembly, engineers must match this physical setting to the network drop configuration defined in the AutoMax programming executive software.
- Network Collisions: Duplicate drop settings across the same coaxial or twinaxial cable run drop line will disrupt network scheduling tokens and trigger communications failure on all associated modules.
- Hardware Isolation: The internal logic circuits operate on a 5 V DC plane completely isolated from the network physical transceiver line to prevent field loops from damaging the main internal microprocessor.
Installation Constraints and Maintenance Protocols
- Chassis Power Rules: Power down the local Shark rack power supply before sliding the 57C554 module into its designated backplane slot. Hot-plugging this legacy card risks fracturing data lines and damaging onboard CMOS chips.
- Shield Grounding: The RJ network port requires a properly shielded cable assembly with intact grounding tabs. Terminate network drops exactly as outlined in Reliance Instruction Manual J-3606 to prevent high-frequency EMI from inducing false communication parity errors.
- Status Code Inspection: During system commissioning, verify that both the CPU OK and COM OK LEDs turn steady green. A dark COM OK indicator with a solid CPU OK indicator signals that the card passed self-test but is failing to establish synchronous framing tokens with the remote master scanner card.
