Product Details
The Yokogawa ST2*D, also cataloged as the ST2*D Digital Input/Output Module Card, operates as a dedicated hardware component for contact signal insulation and high-density discrete I/O interfacing within Yokogawa CENTUM-XL and u-XL DCS platforms. It isolates On-Off contact signals from push button switches and limit switches, outputting status signals directly to process controllers via 32 integrated channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ST2*D |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.65 kg |
| Dimensions | 482.6 mm x 110 mm x 120.5 mm |
| Operating Temp | 0 to 50 deg C |
| Power Consumption | System backplane powered |
| Channel Count | 32 channels |
| Card Density | Up to 16 relay input/output cards |
| Storage Temp | -30 to 85 deg C |
| Operating Humidity | Max 75% non-condensing |
| System Compatibility | Yokogawa CENTUM-XL, u-XL DCS |
4-20 mA HART Loop Protocol and Galvanic Isolation
The ST2*D module incorporates channel-to-channel isolation architecture designed to suppress field-side switching noise and prevent ground potential differentials from damaging internal control bus lines. Galvanic isolation barriers maintain signal integrity across discrete input paths, isolating high-voltage contact spikes from sensitive system electronics. Integrated operational status LEDs provide physical verification of individual relay states during live industrial execution.
Frequently Asked Questions
Q: What physical indicators are available on the ST2D for channel status verification?
A: The ST2D features front-panel LED indicators that display real-time operational status for each relay contact input/output channel.
Q: How does the ST2*D achieve electrical isolation from field switches?
A: The module relies on internal signal insulation circuits that electrically separate On-Off contact inputs (such as limit switches and push buttons) from the internal system logic bus.
Q: Can the ST2D be mounted in standard 19-inch racks?
A: Yes, with a physical width of 482.6 mm, the ST2D module enclosure conforms to standard 19-inch rack mounting dimensions.
Field Installation Guidelines
- ESD Protection: Wear a grounded ESD wrist strap prior to handling the module to protect internal components from electrostatic discharge.
- Environmental Limits: Install the module inside an enclosure that maintains operating ambient temperatures between 0 and 50 deg C and relative humidity below 75% non-condensing.
- Wiring Separation: Route field contact wiring separately from high-voltage AC power lines to minimize induced electromagnetic interference on signal lines.
- Grounding: Ensure cabinet mounting frames and cable shielding are bonded to a dedicated low-impedance safety ground point.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.