Overview
Suffix Breakdown & Model Matrix
| Parameter | Specification |
|---|---|
| Base Model | SEA4D |
| Full Model | SEA4D-01 |
| Product Type | Analog Terminal Board |
| Channel Configuration | 16 channels x 2 |
| Redundancy | Single or dual-redundant configurations |
| Environmental Option – Suffix 6 | ISA Standard G3, no explosion protection |
| Environmental Option – Suffix F | ISA Standard G3, with explosion protection |
Note: The supplied suffix definitions describe separate configuration codes. Confirm the complete model and suffix combination against the original Yokogawa ordering documentation before selecting a replacement.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SEA4D-01 |
| Brand | Yokogawa |
| Weight | Approximately 1.5 kg |
| Operating Temp | -20 to +70 deg C (provided value; verify against the applicable specification) |
| Power Consumption | Not specified |
| Terminal Type | M4 screw terminals |
| Channel Capacity | 16 channels x 2 |
| Surge Protection | Depends on the suffix configuration |
| Insulation Resistance | Minimum 100 Mohm at 500 VDC (provided value; verify against the official specification) |
| Withstand Voltage | 500 VAC for 1 minute between signal terminals and ground (provided value; verify against the official specification) |
| Compatible Cable | KS1 series dedicated signal cables, subject to configuration verification |
| Product Status | Discontinued |
Process Signal Termination and Surge Protection
The SEA4D terminal board provides a physical termination interface for analog field signals. Its channel arrangement supports the specified 16-channel x 2 configuration. The selected terminal-board variant must match the associated I/O hardware, system cable, and redundancy arrangement.
The suffix identifies the stated surge absorber and environmental options. The -0 variant has no surge absorber, whereas -1 specifies a surge absorber. The ISA Standard G3 and explosion-protection options must be verified against the complete ordering code.
The supplied description associates the board with Yokogawa ProSafe-RS equipment. However, the exact compatible I/O modules and system application should be confirmed using the applicable hardware manuals. Do not infer SIL3 certification for the terminal board from system-level compatibility alone.
Frequently Asked Questions
Q: Can the SEA4D-01 be used in a dual-redundant configuration?
A: The supplied information specifies support for single and dual-redundant configurations. Confirm the required terminal-board variant, cabling, and associated I/O hardware before installation.
Q: Does the SEA4D-01 include surge protection?
A: The suffix determines the stated surge absorber configuration. The -0 variant is specified without a surge absorber, while -1 specifies a variant with one. Verify the complete part number before connecting field wiring.
Q: Which I/O modules are compatible with the SEA4D-01?
A: The supplied information lists SAI143, SAV144, and SAI533 as examples. Confirm compatibility with the exact module revision, system generation, and cable arrangement in Yokogawa documentation.
Field Installation Guidelines
- Verify the complete SEA4D ordering code and confirm that the terminal board matches the intended control system configuration.
- Isolate the relevant power sources and follow the site’s lockout and electrical safety procedures before wiring.
- Check terminal assignments against the applicable Yokogawa connection diagram. Do not infer signal polarity or channel mapping from the model number alone.
- Route analog signal cables separately from high-voltage power wiring and high-noise switching conductors where practical.
- Apply shield grounding according to the system grounding design and the manufacturer’s instructions. Avoid introducing unintended ground loops.
- Verify the specified surge absorber option and environmental classification before connecting field circuits.
- Inspect screw terminals, connectors, and cable routing before energizing the system. Use the manufacturer’s specified tightening torque where available.
- Before commissioning, check channel assignments, signal continuity, grounding, and the associated I/O module configuration.
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