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Product Overview
The ASD143-P00/SB4S0 digital input module from Yokogawa is engineered for stable acquisition of discrete field signals within CENTUM and ProSafe-based distributed control architectures. Designed with high-density input capacity and electrical isolation, this module ensures dependable signal recognition even in electrically noisy industrial environments.
Operating on a 24 V DC input standard, the module converts field-level ON/OFF signals into system-level digital status data, supporting both operational control and diagnostic visibility across the DCS.
Functional Description
The ASD143-P00/SB4S0 provides 16 isolated input points for monitoring dry contacts or voltage-based signals originating from field instruments. Each channel is independently conditioned to protect the control system from transient interference while maintaining fast signal responsiveness suitable for interlocks and alarms.
Integrated LED indicators enable technicians to verify input status locally, simplifying commissioning and maintenance activities.
System Compatibility
This module is fully compatible with Yokogawa control platforms, including CENTUM VP, CENTUM CS 3000, and ProSafe-RS safety systems. It is commonly deployed within standard I/O nodes and remote field cabinets.
Key Technical Specifications
Input Channels:
16 discrete digital inputs, independently isolated
Supported Signal Types:
Dry contact inputs and 24 V DC voltage signals
Rated Input Voltage:
24 V DC nominal
Signal Response Time:
Maximum 10 milliseconds
Electrical Isolation:
Channel-to-channel and channel-to-system isolation
Status Indication:
Individual LED indicators per input channel
Environmental Limits:
Operating temperature from 0 °C to +55 °C
Storage temperature from -20 °C to +70 °C
Relative humidity 5% to 95%, non-condensing
Mechanical Characteristics:
Dimensions: 107.5 × 130 × 32.8 mm
Weight: 0.3 kg
Engineering Advantages
The ASD143-P00/SB4S0 is optimized for long-term operation in continuous-process environments. Its fast input scanning supports timely alarm handling, while comprehensive isolation minimizes the risk of ground loops and signal distortion. The compact housing allows high channel density without excessive panel space consumption.
Typical Application Scenarios
This module is widely applied in process and discrete control environments, including chemical production units, power generation plants, oil and gas facilities, and automated manufacturing lines. Common uses include monitoring limit switches, motor status contacts, protective relay outputs, and safety-related interlocks.
FAQ
Q: Does the ASD143-P00/SB4S0 support wet contact inputs?
A: The module is primarily designed for dry contacts and 24 V DC voltage signals. External power sources should comply with Yokogawa input specifications.
Q: Can this module be used in safety systems?
A: Yes. When installed within a ProSafe-RS architecture and configured correctly, it supports safety-related discrete signal monitoring.
Q: Are channels individually isolated?
A: Yes. Each channel is electrically isolated from other channels and from the system backplane to enhance reliability and noise immunity.
