SNT401-53/CU1N

The Yokogawa SNT401-53/CU1N is an Optical ESB Bus Repeater Master Module designed for the Yokogawa ESB Bus system. The specified configuration includes no explosion protection, ISA Standard G3 environmental classification, an operating temperature range of -20 to 70 deg C for maintenance purposes, and the S9345FA connector unit for the ESB Bus.

Technical Specifications

Parameter	Specification
Model	SNT401-53/CU1N
Brand	Yokogawa
Product Type	Optical ESB Bus Repeater Master Module
Explosion Protection	None
Environmental Classification	ISA Standard G3
Operating Temperature	-20 to 70 deg C (maintenance purpose only)
Option Code	/CU1N
Connector Unit	ESB Bus connector unit
Connector Unit Part Number	S9345FA

Configuration and Ordering Information

The ordering code identifies the module configuration and the supplied connector unit.

• -5: Specifies a configuration without explosion protection.
• 3: Specifies ISA Standard G3 and a temperature range of -20 to 70 deg C. The source limits this specification to maintenance purposes.
• /CU1N: Specifies the connector unit for the SNT401 Optical ESB Bus Repeater Master Module, identified by part number S9345FA.

These codes should be retained when identifying the module for replacement or procurement. The stated temperature range should not be interpreted as confirmation of unrestricted operation under all installation conditions.

Frequently Asked Questions

Q: What does the /CU1N option specify?

A: The /CU1N option identifies the ESB Bus connector unit, part number S9345FA, for the SNT401 Optical ESB Bus Repeater Master Module.

Q: Does the SNT401-53/CU1N include explosion protection?

A: No. The -5 suffix explicitly specifies a configuration without explosion protection. Confirm that this configuration meets the installation area's applicable hazardous-area requirements.

Q: Can the module operate continuously from -20 to 70 deg C?

A: The supplied product information associates this temperature range with ISA Standard G3 and explicitly limits it to maintenance purposes. Continuous operating suitability across this range is not established by the supplied information.

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