Description
Product Overview
The Yokogawa SAI143-H63 is a 16-channel analog input module designed for Yokogawa industrial control and process automation systems. It accepts 4–20 mA field signals and provides module-level isolation between the input circuitry and the system, making it suitable for process transmitters used in applications such as pressure, flow, level, and other analog measurements.
The H version supports HART communication, while the -63 configuration includes a signal cable interface adapter and is specified for ISA Standard G3 environmental conditions. The SAI143 series is also available in configurations intended for redundant system architectures, depending on the complete system setup and selected suffix.
For system replacement work, the complete part number is important. SAI143-H63, SAI143-H63/PRP S3, and SAI143-H63/PRP S4 should not be treated as interchangeable simply because the base model is SAI143. Always compare the suffix, hardware revision, connector arrangement, and system configuration before installation.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Yokogawa |
| Model | SAI143-H63 |
| Product Type | Analog Input Module |
| Number of Channels | 16 channels |
| Input Signal | 4–20 mA DC |
| Permissible Input Range | 0–25 mA |
| Isolation | Module isolation |
| HART | Supported on H-version |
| Data Update Frequency | 40 ms |
| 2-Wire / 4-Wire | Individual channel setting |
| Transmitter Power Supply | 16.15 V minimum at 20 mA; 26.4 V maximum at 0 mA |
| Output Current Limit | 25 mA |
| Withstand Voltage | 1.5 kV AC between input signal and system for 1 minute |
| Interface Configuration | Signal cable interface adapter |
| Environmental Specification | ISA Standard G3; -20°C to 70°C |
| Current eBay Condition | New – Open Box |
| Seller Note | “In the box” |
The principal electrical specifications above are consistent with published SAI143-H63 technical information and Yokogawa-related procurement documentation.
Typical Applications
The module is intended for applications where multiple 4–20 mA process signals need to be collected by a Yokogawa control system.
Typical field signals can include:
- Pressure transmitters
- Flow transmitters
- Level transmitters
- Process temperature transmitters
- Valve or process-position feedback
- Other 4–20 mA instrumentation
The 16-channel arrangement allows a single module to collect a relatively high number of analog signals while maintaining module-level isolation.
Installation and Replacement Notes
Before replacing an existing module, check the complete Yokogawa part number printed on the nameplate. Pay particular attention to the H63 suffix and any additional PRP/S3/S4 designation.
A practical replacement procedure is:
- Confirm the system cabinet and I/O station configuration.
- Record the existing module model and hardware revision.
- Verify the field wiring and 2-wire/4-wire configuration.
- Confirm that the signal cable interface adapter matches the existing installation.
- Check transmitter power requirements before connecting field instruments.
- Install the module according to the system’s approved maintenance procedure.
- Restore power and verify each input channel.
- Compare the displayed process values against the field transmitter readings.
Do not change wiring or channel configuration only because the replacement module has the same base model number. The suffix and system configuration can affect compatibility.
Maintenance Tips
Keep the module and surrounding cabinet free from excessive dust, moisture, and contamination. During planned maintenance, inspect terminal connections, interface cables, connectors, and signs of heat or corrosion.
For troubleshooting, a useful first step is to compare the affected channel with a known-good 4–20 mA loop. If several channels fail simultaneously, check the module supply, interface connection, and system-side communication before assuming that individual transmitters are defective.
For HART-enabled applications, verify both the analog current signal and the digital communication path when diagnosing a smart transmitter.
Condition and Inspection
The referenced eBay listing is currently offered as New – Open Box, with the seller note “In the box.”
For an industrial replacement part, buyers should compare the physical nameplate, model suffix, connectors, revision information, and accessories against the existing installation before placing the module into service.
Short Listing Title
Yokogawa SAI143-H63 | 16-Channel 4–20 mA Analog Input Module
中文简短标题
Yokogawa SAI143-H63 | 16通道4–20mA模拟量输入模块
