Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SEA4D-11 |
| Brand | Yokogawa |
| Product Type | Analog Terminal Board |
| Product Series | SEA4D |
| Weight | Approximately 1.6 kg (unverified) |
| Dimensions | Not specified |
| Operating Temp | -20 to +70 deg C (unverified) |
| Channel Configuration | 16 channels x 2 |
| Redundancy | Single and dual-redundant configurations, subject to system compatibility |
| Surge Absorber | Configuration depends on the complete suffix code |
| Field Terminals | M4 screw terminals, as stated in the supplied data |
| Compatible System Cables | KS1 series, subject to hardware configuration |
| Withstand Voltage | 500 V AC for 1 minute, as supplied; verify against official documentation |
| Insulation Resistance | Minimum 100 Mohm at 500 V DC, as supplied; verify against official documentation |
Analog Signal Termination and Surge Protection
The terminal board provides the physical connection point between field wiring and compatible control system I/O hardware. Before connecting field instruments, verify the signal type, terminal assignment, cable specification, and supported I/O module configuration against the applicable Yokogawa documentation.
The supplied suffix descriptions indicate different surge absorber configurations. Do not assume that the complete SEA4D-11 ordering code includes surge protection without confirming the manufacturer’s suffix definitions.
For analog loop applications, verify signal polarity, shield termination, grounding arrangements, and isolation requirements. Do not infer support for HART, FOUNDATION Fieldbus, or Profibus PA from the terminal board designation alone.
Frequently Asked Questions
Q: Does the SEA4D-11 support single and dual-redundant configurations?
A: The supplied description identifies single and dual-redundant configurations for the SEA4D series. Confirm the compatible I/O modules, cables, and terminal assignments before using the board in a redundant configuration.
Q: Does the SEA4D-11 include built-in surge absorbers?
A: The supplied suffix information distinguishes configurations with and without surge absorbers. Verify the complete suffix code and nameplate before relying on surge protection.
Q: Can the SEA4D-11 be connected directly to any Yokogawa analog I/O module?
A: No universal compatibility can be established from the supplied information. Check the official hardware compatibility documentation for the specific I/O module, system generation, and cable assembly.
Field Installation Guidelines
- Confirm the complete model code and nameplate before mounting or wiring the board.
- Verify mechanical fit, terminal layout, and cable compatibility against the applicable installation manual.
- De-energize the relevant circuits and follow site electrical safety procedures before making connections.
- Route analog signal cables separately from high-voltage power cables and high-noise switching conductors where practical.
- Terminate cable shields according to the system grounding design and manufacturer’s instructions.
- Check terminal tightness and conductor preparation against the specified terminal requirements.
- Verify grounding, insulation, and field wiring continuity before energizing the system.
- Confirm the surge absorber configuration before connecting field circuits exposed to transient overvoltages.
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