Product Details
The Yokogawa ST3*D, also cataloged as the ST3*D Multi-Status Input Card, operates as a dedicated hardware component for discrete signal processing and protocol conversion within Yokogawa industrial control networks. The card receives 24 VDC On-Off digital inputs from field sensors and switches, executing signal translation to 0-24 VDC at 1 A outputs while transmitting status data across PROFIBUS-DP, DeviceNet, and Modbus networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ST3*D |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.5 kg |
| Dimensions | 100 mm x 100 mm x 50 mm |
| Operating Temp | -20 to 70 deg C |
| Power Consumption | System backplane powered |
| Product Type | Multi-Status Input Card |
| Input Voltage | 24 VDC |
| Output Voltage | 0-24 VDC |
| Output Current | 1 A |
| Communication Protocols | PROFIBUS-DP, DeviceNet, Modbus |
Channel-to-Channel Isolation and Bus Protocols
The ST3*A/D architecture relies on channel-to-channel isolation barriers to separate high-density field contact wiring from main controller processing logic. By isolating individual input circuits, the hardware prevents ground loop noise and common-mode transients from disrupting field bus communication links. Built-in protocol execution controllers convert local discrete state changes into deterministic industrial network frames, supporting multi-drop integration across PROFIBUS-DP, DeviceNet, and Modbus trunk lines without requiring external gateway interfaces.
Frequently Asked Questions
Q: How does the ST3*D preserve communication stability when field contacts experience high electrical noise?
A: Channel-to-channel isolation prevents transient voltage spikes and ground potential differences from bridging onto the digital communication backplane, suppressing signal cross-talk during bus transmissions.
Q: Can the ST3*D drive external discrete loads directly from its output stage?
A: Yes, the module provides an output rating of 0-24 VDC at up to 1 A per configured channel to drive field relays, indicators, or low-power actuators directly.
Q: What communication interfaces are natively supported by the card firmware?
A: The ST3*D hardware supports PROFIBUS-DP, DeviceNet, and Modbus serial communication protocols for integration into main control network architectures.
Field Installation Guidelines
- ESD Protection: Handle the module using a grounded wrist strap to prevent static discharge from damaging onboard communication interface circuits.
- Environmental Operating Limits: Mount the card in a protective panel enclosure maintaining an ambient temperature between -20 and 70 deg C with non-condensing atmospheric conditions.
- Cable Routing and Shielding: Run 24 VDC discrete wiring and industrial bus communication cables in separate wireways away from high-voltage motor supply lines to reduce inductive coupling.
- Grounding Connection: Ensure cabinet chassis ground straps are firmly bonded to a single-point low-impedance earth ground bar to maintain shield continuity.
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.