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Yokogawa S9344FA Optical ESB Bus Repeater Slave Module

Configured for electrical-to-optical signal conversion in distributed ESB networks, the Yokogawa S9344FA (S9344FA Optical ESB Bus Repeater Slave Module) provides direct physical and electrical execution of backplane signal extension to fiber-optic links in ProSafe-PLC, ProSafe-RS, or CENTUM control architectures.

Suffix Breakdown & Model Matrix

The provided documentation identifies S9344FA as a fixed model designation with no additional suffix decomposition specified.

Hardware Specifications

Parameter	Specification
Model	S9344FA
Brand	Yokogawa
Origin	Not specified in provided documentation
Product Type	Optical ESB Bus Repeater Slave Module
Module Type	Connector Interface Unit
Dimensions	82 mm x 19 mm x 25 mm
Weight	0.75 kg
Power Supply	5 VDC (via backplane)
Power Consumption	2.0 W to 8.0 W (configuration dependent)
Isolation Voltage	500 V AC to 1500 V AC
Network Medium	Fiber-optic cable (Single-mode or Multi-mode)
Function	Electrical ESB Bus <-> Optical Fiber Bus conversion
Operating Temp	0 degC to +60 degC
Storage Temp	-40 degC to +85 degC
Relative Humidity	10% to 90% RH, non-condensing

Channel-to-Channel Isolation and Optical Conversion

The S9344FA employs optoelectronic conversion to achieve rigorous electrical isolation between rack electronics and optical network cabling. Channel-to-channel isolation ensures signal integrity and EMI/RFI immunity across the extended fiber link, supporting continuous, deterministic safety network data exchange with minimal latency.

Frequently Asked Questions

Q: Can the S9344FA be hot-swapped in the field?
A: The module supports hot-swapping when installed in a compatible rack system, provided the associated master module maintains link supervision during replacement.

Q: What is the maximum distance supported via optical cabling?
A: Maximum extension distance depends on the fiber type (single-mode or multi-mode) and system configuration rules; the module converts signals but does not impose a fixed range limitation.

Q: What level of isolation does the module provide?
A: Isolation voltage is rated between 500 V AC and 1500 V AC, electrically separating rack circuitry from the fiber-optic link to prevent ground loop or noise propagation.

Field Installation Guidelines

• Verify module orientation and slot compatibility within the ESB module rack before insertion.
• Ensure the backplane is de-energized when installing multiple modules simultaneously.
• Route fiber-optic cables avoiding sharp bends or physical stress to prevent signal degradation.
• Maintain separation of power and signal fibers from electromagnetic noise sources.
• Observe grounding requirements for the rack and chassis according to site electrical standards.
• After installation, confirm signal integrity and diagnostic status through the master module.
• Replace modules individually when operating in redundant or critical link configurations to maintain network integrity.

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