Yokogawa SNB10D-445/CU2T Safety Node Unit ProSafe-RS

Yokogawa SNB10D-445/CU2T Safety Node Unit ProSafe-RS

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Yokogawa SNB10D-445/CU2T Safety Node Unit Configured for distributed I/O expansion in ProSafe-RS safety systems, the Yokogawa SNB10D-445/CU2T (SNB10D-445/CU2T Safety Node Unit) provides direct...

رمز المنتج: SNB10D-445/CU2T

Manufacturer: Yokogawa
Product No.: SNB10D-445/CU2T
Product Type: Safety Node Units
Product Origin: Japan
Payment:T/T, Western Union
Weight: 5900g
Shipping port: Xiamen
Warranty: 12 months

وصف التقييمات

Yokogawa SNB10D-445/CU2T Safety Node Unit

Configured for distributed I/O expansion in ProSafe-RS safety systems, the Yokogawa SNB10D-445/CU2T (SNB10D-445/CU2T Safety Node Unit) provides direct physical housing, ESB bus integration, and redundant power distribution for high-integrity safety I/O modules.

Hardware Specifications

Parameter	Specification
Model	SNB10D-445/CU2T
Brand	Yokogawa
Origin	Japan
Weight	5.9 kg
Dimensions	482.6 x 221.5 x 205 mm
Operating Temp	-10 deg C to +55 deg C
Power Consumption	5.5 A (max)
I/O Capacity	8 modules
Bus Interface	ESB bus with CU2T terminator

Safety SIS Integration

The SNB10D-445/CU2T incorporates high-reliability features designed for Safety Instrumented Systems (SIS). The unit supports galvanic isolation between the power distribution rails and the ESB bus interface, preventing fault propagation from field-side circuitry into the main safety controller. To maintain system-wide safety integrity, this node unit utilizes fail-safe state execution, ensuring that in the event of power rail disruption or bus communication loss, connected I/O modules revert to a defined safe state. The integration of ISA G3 corrosion-resistant protection ensures the electrical terminals and backplane components remain unaffected by environmental contaminants during long-term operational cycles.

Frequently Asked Questions (FAQ)

Q: Does the SNB10D-445/CU2T support on-line replacement of power supply modules?

A: Yes. The dual-redundant power configuration permits the extraction and replacement of power supply components while the unit is operational, maintaining continuous power delivery to the I/O bus.

Q: What are the primary considerations when configuring the ESB bus with the CU2T terminator?

A: The CU2T terminator must be correctly seated at the physical end of the ESB bus segment to prevent signal reflections. Improper termination will result in CRC errors and degraded communication latency between the safety node and the processor module.

Field Installation Guidelines

Rack Mounting: The unit is designed for 19-inch rack mounting. Secure the chassis using 4 M5 screws equipped with insulation bushes to prevent direct metal-to-metal contact and potential ground loops.
Grounding: Connect the chassis ground terminal to the main cabinet ground bus using a multi-stranded copper conductor. This provides a low-impedance path for noise discharge and satisfies electromagnetic compatibility requirements.
Bus Cabling: Route ESB bus cables through dedicated conduits or cable trays, maintaining physical separation from high-current power cables to prevent electromagnetic coupling.
Environmental Sealing: Ensure the cabinet housing the unit provides adequate ingress protection. While the unit features G3-rated corrosion resistance, avoid direct exposure to moisture or high-velocity airflow containing conductive dust.

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