Yokogawa ST3*D Multi-Status Input Card
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 & Bus Protocols
The Yokogawa ST3*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.
Yokogawa ST3*D Multi-Status Input Card
Yokogawa ST3*D Multi-Status Input Card
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 & Bus Protocols
The Yokogawa ST3*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.
