Product Details
The Yokogawa ST3*A, also cataloged as the ST3*A Multi-Status Input Card, operates as a dedicated hardware component for digital discrete signal conversion and channel isolation within Yokogawa process control platforms. It processes multi-channel On-Off status inputs from field sensors and switches, translating 24 VDC voltage states into digital controller data across dedicated system backplane buses.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ST3*A |
| 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 | Standard backplane system bus power supply |
| Product Type | Multi-Status Input Card |
| Input Voltage | 24 VDC |
| Channel Configuration | Multi-channel discrete monitoring |
| Signal Isolation | Channel-to-channel electrical isolation |
| Visual Indicators | Front-panel LED status per channel |
Channel Isolation and HART Loop Architecture
The ST3*A module features dedicated channel-to-channel isolation circuits to prevent ground loop currents and protect internal system logic from field-side electrical transients. Integrated input filtering stages suppress electromagnetic interference generated by 24 VDC contact switching networks. Individual front-panel LEDs provide direct physical verification of active input logic states to simplify hardware-level fault diagnosis during execution.
Frequently Asked Questions
Q: How does the ST3*A handle electrical noise across adjacent field channels?
A: Electrical isolation barriers between input channels prevent common-mode noise and ground potential differences from causing signal cross-talk or corrupting internal logic backplane communications.
Q: What physical indications confirm live signal input states on the card?
A: Each individual input channel includes a dedicated front-panel LED indicator that illuminates directly when a valid 24 VDC logic signal is present.
Q: Is external power wiring required to drive the internal card electronics?
A: The ST3*A draws operating power directly from the system backplane rack assembly, while accepting field discrete inputs within standard 24 VDC range limits.
Field Installation Guidelines
- ESD Protection: Handle the module using a grounded wrist strap to prevent electrostatic discharge from damaging onboard semiconductor components.
- Environmental Control: Ensure cabinet ambient temperatures remain within the -20 to 70 deg C operating range with condensation-free atmospheric conditions.
- Wiring Practice: Separate low-voltage discrete input signal cabling from high-power AC lines within panel wireways to minimize cross-coupled inductive interference.
- Grounding: Connect system racks and cable shields directly to an isolated instrument earth ground bar to ensure continuous electrical shield integrity.
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
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