Product Overview
The Yokogawa ASD143 acquires discrete signals from field devices like switches and sensors. This module provides 16 digital input channels with 24 VDC nominal operating voltage. It reads status changes from push buttons, limit switches, and proximity detectors. The unit integrates seamlessly into Yokogawa CENTUM and ProSafe-RS systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | ASD143 |
| Product Type | Digital Input Module |
| Number of Inputs | 16 discrete channels |
| Nominal Voltage | 24 VDC |
| Input Voltage Range | 19.2–28.8 VDC |
| Input Current | 6 mA per channel typical |
| ON Voltage | ≥15 VDC |
| OFF Voltage | ≤5 VDC |
| Isolation | Optical isolation between field and system |
| Isolation Voltage | 1500 VAC for 1 minute |
| Input Filter | 1 ms programmable |
| Power Dissipation | 3.2 W typical |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | –40°C to 85°C |
| Humidity Range | 5% to 95% non-condensing |
Physical Dimensions and Mounting
This module measures 130 mm in height, 30 mm in width, and 100 mm in depth. The unit weighs approximately 0.30 kg. It mounts directly onto a DIN rail within the system cabinet. The front panel includes 16 LED indicators for channel status monitoring. These LEDs show active inputs and fault conditions clearly.
Electrical Interface and Field Wiring
A 37-pin D-sub connector provides the primary interface for field wiring connections. The module accepts dry contact or powered sensor inputs on each channel. Each input features built-in surge suppression for transient protection. The optical isolation barrier withstands 1500 VAC during dielectric testing. Field devices like limit switches, push buttons, and proximity sensors connect directly to these terminals.
Performance and Response Characteristics
The ASD143 scans all 16 inputs within a single control cycle period. It includes a programmable input filter up to 1 millisecond for noise rejection. The module detects open-wire and short-circuit conditions through built-in diagnostics. It reports these faults to the main controller immediately. Furthermore, the module performs continuous self-checks for operational integrity. These features guarantee reliable data acquisition in critical processes.
Installation and System Integration
You can install this module in any available slot within the Yokogawa CENTUM chassis. The backplane automatically handles address assignment and power distribution. Always configure the input filter timing using the system engineering software. For high-reliability applications, implement redundant modules for failover protection. Verify the field wiring polarity matches the termination diagram.
Environmental Compliance and Certification
This module carries CE marking and UL recognition for global deployment. It also complies with RoHS and WEEE environmental directives. The conformal coating protects the PCB against moisture and dust ingress.
Details
| Weight | 0.30 kg |
|---|---|
| Dimensions | 130 × 40 × 120 mm |
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