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
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