SEA4D-01 | Yokogawa | ProSafe-RS SIL3 Analog Terminal Board, 32-Point, M4 Screw

Product Overview

The SEA4D-01 is a SIL3-compliant analog terminal board designed for the Yokogawa ProSafe-RS Safety Instrumented System (SIS). It provides high-integrity signal termination for analog input and output modules, supporting 16 channels × 2 (32 points total) in a single 19-inch rack-mountable assembly. The board features M4 screw terminals for secure field wiring and is engineered without a surge absorber for standard industrial environments.

Key Specifications

• System: Yokogawa ProSafe-RS SIS
• Safety Rating: SIL3
• Channels: 16 × 2 (32 points total)
• Signal Type: Analog (input/output)
• Connection: M4 screw terminals
• Mounting: 19-inch rack mountable
• Withstand Voltage: 500 V AC for 1 minute
• Insulation Resistance: ≥ 100 MΩ (at 500 V DC)
• Compatible Modules: SAI143, L1AI143, SAV144, L1AV144, SAI533, L1AI533
• Connection Cable: KS1 cable
• Dimensions: 124 × 120 × 25 mm
• Weight: 1.5 kg

Features & Benefits

1. SIL3 Certified: Meets Safety Integrity Level 3 requirements for emergency shutdown (ESD) and fire & gas (F&G) systems.
2. High-Density Termination: 32 analog points in a compact 19-inch rack format maximize cabinet space efficiency.
3. Vibration-Resistant M4 Screws: High-torque screw terminals ensure reliable long-term contact resistance in high-vibration environments.
4. Superior Dielectric Protection: 500 V AC withstand voltage and 100 MΩ insulation resistance shield sensitive safety controllers from field transients.
5. Dual-Redundant Ready: Supports both single and dual-redundant I/O configurations when paired with redundant ProSafe-RS modules.

FAQ

Q: What is the difference between SEA4D-01 and SEA4D-11?
A: The SEA4D-01 is supplied without a surge absorber. The SEA4D-11 includes an integrated surge absorber for enhanced transient protection in electrically noisy environments.

Q: Does this board support both analog inputs and outputs?
A: Yes, the SEA4D-01 is a universal analog terminal board compatible with both analog input modules (SAI143) and analog output modules (SAI533).

Q: Is the SEA4D-01 compatible with CENTUM VP?
A: The SEA4D-01 is specifically engineered for ProSafe-RS safety systems. While Yokogawa platforms share design traits, always verify compatibility with your specific I/O module to maintain SIL3 compliance.

Installation Guide

• Mount the board in a 19-inch rack inside the safety cabinet.
• Connect the KS1 cable from the ProSafe-RS I/O module to the board's KS1 connector.
• Terminate field instrument wiring using M4 ring or spade lugs with controlled torque.
• Ground shielded cable drain wires at a single-point reference to prevent ground loops.
• Install connector covers on unused KS1 connectors to protect pins from dust and damage.

Selection Tips

• Surge Protection: Choose SEA4D-01 for standard environments. For plants with high electrical noise or lightning exposure, select SEA4D-11 with built-in surge absorber.
• Redundancy: For dual-redundant safety loops, install two SEA4D-01 boards and pair with redundant SAI143 or SAI533 modules.
• Cable Compatibility: Ensure KS1 cables are original Yokogawa parts to maintain SIL certification and shielding integrity.