Yokogawa SNB10D SNB10D-225/CU2T Rack Mountable Safety Node Unit

Overview:

The SNB10D-225/CU2T is a Rack Mountable Safety Node Unit designed for use in Yokogawa's ProSafe-RS safety instrumented system. This unit connects to a safety control unit, transmitting analog input signals and contact signals from the field to the control unit via an ESB (Ethernet Safety Bus). It also provides power to I/O modules, ensuring reliable and secure data communication in safety-critical environments.

Features

• Modular Design: The SNB10D-225 includes power supply modules, ESB bus interface modules, optical ESB bus repeater modules, and I/O modules, providing a complete solution for safety control systems.
• Redundancy: Dual-redundant power supply configuration, ensuring continuous operation even if one power supply fails.
• Communication: ESB bus coupler modules (SEC402 or SEC401) allow connection to safety control units, supporting up to 13 safety node units for increased system flexibility.
• Explosion Protection: The unit supports explosion protection with an ISA Standard G3 design, making it suitable for hazardous environments.
• Rack Mountable: The SNB10D-225 is designed for 19-inch rack mounting, ensuring easy integration into existing control system infrastructures.

Specifications

• Model: SNB10D Safety Node Unit (Rack Mountable Type)
• Suffix Codes:
  • -2: Dual-redundant power supply with software license for node expansion (R3)
  • -4: Dual-redundant power supply (R4.01 or later)
  • Power Supply Options:
    • 1: 100 to 120 V AC, 50/60 Hz
    • 2: 220 to 240 V AC, 50/60 Hz
    • 4: 24 V DC
  • Explosion Protection:
    • E: With explosion protection for temperature range (-20 to 70°C)
    • 5: Without explosion protection, ISA Standard G3
  • Option Codes:
    • /CU2N: Connector Unit for ESB Bus (Part number: S9342FA)
    • /CU2T: Connector Unit with Terminator for ESB Bus (Part number: S9343FA)
    • /ATDOC: Explosion Protection Manual for ATEX compliance

Power Specifications

• Power Consumption:
  • 100-120 V AC: 200 VA
  • 220-240 V AC: 230 VA
  • 24 V DC: 5.5 A
• Power Supply Voltage:
  • 100 to 120 V AC (50/60 Hz)
  • 220 to 240 V AC (50/60 Hz)
  • 24 V DC

Physical Characteristics

• Weight: Approx. 5.9 kg
• Mounting Method: Rack mountable with four M5 screws, insulation bushes (accessories included).
• Mounting Restrictions:
  • Refer to “Node Unit Mounting Restrictions” in the “Outline of I/O Modules (for FIO)” document (GS 32P06K60-01EN) for specific guidelines on module quantity and slot positioning.

Standards and Compliance

• Conformity Standards: Compliant with ProSafe-RS Standards, ensuring reliable and secure operation in safety-critical environments.
• Explosion Protection: Select models are designed with explosion protection in mind, adhering to ISA Standard G3 and relevant safety standards for hazardous locations.
• System Compatibility: The SNB10D-225 is compatible with safety control units using SEC401 or SEC402 ESB bus coupler modules. Up to 13 safety node units can be connected to the system for scalability.

Applications

• Safety Instrumented Systems (SIS): Integral to systems requiring high safety integrity, such as emergency shutdown systems and critical process monitoring in hazardous environments.
• Industrial Automation: Supports control systems, sequencing, and data acquisition in industries such as oil and gas, chemical processing, and power generation.

Additional Information

• Dummy Cover: A dummy cover (SDCV01) should be installed in unused slots to maintain system integrity and prevent dust and debris from entering.
• Installation Requirements: Devices must be installed in a keyed metallic cabinet to meet safety, EMC, and explosion protection standards.