RSTi Digital Output Module ST-3218 GE Fanuc

Product Overview

The ST-3218 (ST-3218) is a high-density digital output module designed for the GE Fanuc (Emerson) RSTi distributed I/O system. This "slice" module provides 8 independent 24 VDC sourcing outputs in an ultra-compact form factor. Engineered for high-speed automated machinery, conveyor systems, and process control skids, the ST-3218 drives actuators, solenoids, and indicators with millisecond precision. By integrating into the RSTi network adapter assembly, this module allows engineers to scale I/O count precisely to the application's needs while minimizing cabinet footprint. We supply this module as 100% Brand New, ensuring factory-original performance and seamless integration into your modern fieldbus architecture.

Technical Specifications

The ST-3218 utilizes advanced semiconductor switching to deliver clean, protected 24 VDC power to field-side loads.

Engineering Advantages

• High-Density Slice Design: With a width of only 12 mm, the ST-3218 maximizes rack space. It allows for the concentration of 8 output points in a space that traditionally accommodated only 2 or 4 points, significantly reducing the size and cost of control enclosures.

• Short-Circuit and Thermal Protection: The module incorporates internal electronic protection for each channel. If a field-side short circuit or over-current condition occurs, the module limits the current to prevent damage to the internal circuitry and the backplane, ensuring system-wide stability.

• Simplified Field Wiring: The ST-3218 features a removable terminal block and push-in spring-clamp connections. This allows for rapid, vibration-resistant wiring that does not require specialized tools, speeding up commissioning and maintenance cycles.

• Clear Diagnostic Visibility: High-intensity LEDs on the front panel provide immediate visual feedback of the output state for each channel. This allows maintenance personnel to verify signal presence at a glance, drastically reducing troubleshooting time during machine downtime.

FAQs

• Is this a sourcing or sinking output module?

  The ST-3218 is a Sourcing (Source) module, meaning it switches the positive (+24 VDC) side of the power supply to the load. Ensure your field devices are wired to a common negative return.

• Can I replace this module while the system is powered?

  While the RSTi system is designed for modularity, we recommend following standard safety procedures and checking your network adapter's documentation regarding "Hot Swapping" to prevent bus communication errors.

• What is the maximum current this module can handle?

  Each channel can handle up to 0.5 Amps. If all 8 channels are active simultaneously, the total module current should not exceed 4.0 Amps. For higher current loads, use an external interposing relay.

• Does this module require a separate power feed?

  The ST-3218 draws its logic power from the RSTi backplane. However, the field-side power for the 24 VDC outputs is typically supplied via the power contacts on the network adapter or a separate power potential distributor (ST-7xxx) slice.