Product Overview

The Yokogawa SED4D-06 is a digital terminal board for field signal termination. This board supports both single and dual-redundant configurations for flexibility. The channel configuration offers 16 channels multiplied by 2 for dense I/O density. Suffix code 1 (0) indicates no surge absorber on this model. Suffix code 2 (6) confirms ISA Standard G3 compliance with no explosion protection. Terminal connections use M4 screws for secure field wiring. The SED4D-06 weighs approximately 1.5 kg for robust mounting. This terminal board specifically handles digital signals in safety applications up to SIL3. Connection to the system uses AKB331 cable for reliable signal transmission.

Technical Specifications

General Specifications

Electrical Specifications

Channel Configuration

The SED4D-06 provides 16 channels multiplied by 2 for flexible I/O arrangement. Each group of channels supports independent signal wiring. This configuration allows mixing of input and output signals on the same terminal board. For dual-redundant applications, both sets of channels work together. Consequently, the Yokogawa SED4D-06 adapts to various system architectures.

Single & Dual-Redundant Configurations

The SED4D-06 supports both single and dual-redundant configurations. In single configuration, one set of 16 channels handles field signals. In dual-redundant configuration, two identical signal paths provide fault tolerance. If one path fails, the other continues normal operation. For safety-critical applications, dual-redundant configuration is essential. Therefore, the Yokogawa SED4D-06 suits SIL3-rated safety systems.

SIL3 Safety Rating

This terminal board carries a SIL3 safety rating for critical applications. SIL3 represents high integrity for safety instrumented systems. The SED4D-06 meets the rigorous requirements of IEC 61508 standards. For emergency shutdown, fire and gas, and burner management systems, SIL3 approval proves essential. Consequently, the Yokogawa SED4D-06 provides reliable signal termination in safety loops.

Suffix Code Interpretation

Suffix code 1 uses the value 0 for this model configuration. This code indicates no surge absorber is installed on the terminal board. For applications with surge protection requirements, select a different suffix. Suffix code 2 uses the value 6 for this specific model. This code indicates ISA Standard G3 compliance for corrosion resistance. Additionally, it confirms no explosion protection on this terminal board. The SED4D-06 suits harsh environmental conditions while remaining non-incendive.

ISA Standard G3 Compliance

Suffix code 6 includes ISA Standard G3 compliance for corrosive environments. G3 standards address airborne contaminants like sulfur and chlorine compounds. For chemical plants, refineries, and wastewater facilities, this compliance proves valuable. The SED4D-06 resists corrosion damage in aggressive industrial atmospheres. Therefore, long-term reliability improves significantly in harsh locations.

M4 Screw Terminals

Terminal connections use M4 screws for secure field wiring. These screws accept ring or spade terminals for reliable connections. M4 size provides ample holding force without damaging wires. For vibration-prone installations, screw terminals maintain contact integrity. The Yokogawa SED4D-06 simplifies field wiring with accessible, clearly marked terminals.

AKB331 Connection Cable

Connection to the I/O module uses the AKB331 dedicated cable. This cable provides reliable signal transmission between terminal board and module. The SED4D-06 and AKB331 form a complete field termination solution. For system integration, always use the specified AKB331 cable. Consequently, signal integrity remains high and installation errors reduce.

Withstand Voltage & Insulation Resistance

Withstand voltage reaches 500 V AC for one minute between circuits. This rating ensures adequate isolation for industrial applications. Insulation resistance measures 100 MΩ minimum when tested at 500 V DC. High insulation resistance prevents leakage currents between channels. For reliable signal integrity, the Yokogawa SED4D-06 provides robust electrical isolation.

Weight & Physical Characteristics

Weight measures approximately 1.5 kg for the SED4D-06. This substantial weight reflects robust construction for industrial environments. The terminal board mounts securely within control cabinets. For system integrators, the weight indicates durable build quality. The Yokogawa SED4D-06 occupies standard mounting footprints in Yokogawa systems.

Installation Guidelines

Follow these steps for proper installation of the SED4D-06.

1. Power down the control system completely before installing the terminal board.

2. Mount the SED4D-06 securely in the cabinet using appropriate hardware.

3. Connect the AKB331 cable between the terminal board and I/O module.

4. Strip field wires appropriately for M4 screw terminal connections.

5. Terminate each field wire under the correct M4 screw terminal.

6. Verify single or dual-redundant configuration matches system design.

7. Apply torque to M4 screws according to manufacturer specifications.

8. Power up the system and test each channel for correct signal transmission.

Note: The SED4D-06 with suffix code 6 provides no explosion protection. For hazardous areas, select an appropriate explosion-protected model instead. Always use AKB331 cable for connection to I/O modules. Insulation resistance should measure 100 MΩ minimum at 500 V DC before commissioning.

Packaging List

• One Yokogawa SED4D-06 Digital Terminal Board

• One set of M4 screw terminals (installed)

• One product documentation manual

• One anti-static protective bag

Common FAQs

1. What is the channel configuration of the SED4D-06?

This terminal board provides 16 channels multiplied by 2 for dense I/O density. Each group of channels supports independent signal wiring. For dual-redundant applications, both sets of channels work together. Therefore, the Yokogawa SED4D-06 adapts to various system architectures from single to fully redundant.

2. What safety rating does the SED4D-06 carry?

This terminal board carries a SIL3 safety rating for critical applications. SIL3 represents high integrity for safety instrumented systems per IEC 61508. For emergency shutdown, fire and gas, and burner management systems, SIL3 approval proves essential. Consequently, the Yokogawa SED4D-06 provides reliable signal termination in certified safety loops.

3. What does suffix code 6 mean on the SED4D-06?

Suffix code 6 indicates ISA Standard G3 compliance for corrosion resistance. This standard addresses airborne contaminants like sulfur and chlorine compounds. Additionally, suffix code 6 confirms no explosion protection on this terminal board. For chemical plants and refineries, the Yokogawa SED4D-06 with G3 compliance suits harsh environments.

4. What cable connects the SED4D-06 to I/O modules?

Connection uses the AKB331 dedicated cable for reliable signal transmission. Always use this specified cable for proper system integration. The SED4D-06 and AKB331 form a complete field termination solution. Consequently, signal integrity remains high and installation errors reduce significantly.

5. What is the withstand voltage of the SED4D-06?

Withstand voltage reaches 500 V AC for one minute between circuits. Insulation resistance measures 100 MΩ minimum when tested at 500 V DC. High insulation resistance prevents leakage currents between adjacent channels. For reliable signal integrity, the Yokogawa SED4D-06 provides robust electrical isolation for digital signals.

Why Choose This Terminal Board?

The Yokogawa SED4D-06 delivers reliable digital signal termination for Yokogawa control systems. Sixteen channels multiplied by 2 provide dense I/O density in a compact footprint. Single and dual-redundant configurations support various system architectures. SIL3 safety rating allows use in critical safety instrumented functions. ISA Standard G3 compliance ensures corrosion resistance in harsh environments. M4 screw terminals provide secure, vibration-resistant field wiring. For digital signal termination in Yokogawa systems, choose the SED4D-06.