Yokogawa ASI133 Analog Input Modules

Equipped with multiple input channels, the ASI133 allows seamless connection of sensors and transmitters that operate on standard analog signals such as 4–20 mA, 1–5 V, and others. The module supports advanced diagnostics, channel isolation, and hot-swapping, ensuring minimal downtime and maximized system availability in demanding environments like chemical plants, refineries, and power generation facilities.

Product Advantages

1. High Accuracy and Resolution: Delivers precise analog signal conversion for critical industrial processes, with excellent signal integrity and minimal drift.

2. Multi-channel Capability: Supports multiple analog input channels, making it cost-effective and space-efficient.

3. Robust Noise Rejection: Built-in noise filtering ensures clean signal acquisition even in electrically noisy environments.

4. Advanced Diagnostics: Offers per-channel diagnostics for loop current detection, wiring issues, and input status for proactive maintenance.

5. Hot-swappable Design: Enables module replacement without shutting down the entire system, reducing maintenance time and improving plant uptime.

6. Compatibility with Yokogawa Systems: Fully integrated with CENTUM VP and Stardom DCS/PLC platforms, ensuring seamless control integration.

7. Industrial-grade Reliability: Designed for 24/7 operation in harsh industrial environments, including wide temperature and humidity ranges.

Technical Specifications

Product Applications

The Yokogawa ASI133 is suitable for a broad spectrum of analog data acquisition tasks across multiple industries:

• Petrochemical and Refining Plants: For accurate monitoring of pressure, temperature, and flow via analog sensors.

• Power Generation Facilities: Used to gather signals from analog transmitters in turbines, boilers, and auxiliary systems.

• Water and Wastewater Treatment: Monitoring chemical dosing systems, flow meters, and pressure transmitters.

• Manufacturing Plants: Analog signal acquisition from production equipment for process control and monitoring.

• Pharmaceutical and Food Industries: Analog data logging in quality-controlled environments.

Installation Instructions

1. Mounting: Install the ASI133 module on a DIN rail or onto a compatible Yokogawa base unit. Ensure proper mechanical locking.

2. Wiring: Connect analog signal wires to the designated terminal block with shielding and grounding. Ensure correct polarity and signal type.

3. Configuration: Use Yokogawa engineering tools (e.g., SENG, VDS) to configure the input type (voltage/current), range, and scaling per channel.

4. Diagnostics Check: After power-up, run a system diagnostic to verify signal integrity, wiring correctness, and channel response.

5. Commissioning: Once configuration is verified, the system can enter operational mode. Real-time values will appear on the control station.

Frequently Asked Questions (FAQ)

Q1: What types of signals can ASI133 handle?

A1: The ASI133 supports both current (4–20 mA) and voltage (1–5 V) analog signals per channel.

Q2: Can I mix current and voltage inputs on different channels?

A2: Yes, the module allows per-channel configuration, so each channel can be independently set for voltage or current input.

Q3: Is ASI133 hot-swappable?

A3: Yes, it can be hot-swapped without shutting down the system, provided the DCS/PLC is designed for live replacement.

Q4: What is the accuracy level of this module?

A4: The ASI133 provides a high accuracy of ±0.1% of full scale.

Q5: How do I know if a channel is malfunctioning?

A5: Built-in diagnostics will alert you to open circuits, out-of-range values, or wiring issues.

Q6: Is this module compatible with older Yokogawa systems?

A6: It is primarily designed for CENTUM VP and Stardom platforms. Check with Yokogawa support for legacy compatibility.

Q7: How many modules can I install per system?

A7: The number depends on the CPU and base unit configuration. Typically, multiple ASI133s can be used simultaneously.

Q8: Does this module require an external resistor for current input?

A8: Yes, an external 250 Ω resistor is commonly used to convert current to voltage for accurate measurement.

Q9: What is the typical response time per input?

A9: The sampling rate is approximately 100 ms per channel, suitable for most control applications.

Q10: Can I use this in hazardous environments?

A10: Yes, the ASI133 is certified for industrial environments but should be paired with appropriate explosion-proof enclosures if needed.