SSB401-11 Yokogawa ProSafe-RS Datasheet & Technical Manual

SSB401-11 Yokogawa ProSafe-RS Optical ESB Bus Module

SSB401-11 Yokogawa ProSafe-RS Optical ESB Bus Module

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Yokogawa SSB401-11 ProSafe-RS Safety Node Base The Yokogawa SSB401-11, also cataloged as the SSB401 Safety Node Base Unit, operates as...

SKU: SSB401-11

Manufacturer: Yokogawa
Product No.: SSB401-11
Product Type: Safety Node Base Units
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 900g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa SSB401-11 ProSafe-RS Safety Node Base

The Yokogawa SSB401-11, also cataloged as the SSB401 Safety Node Base Unit, operates as a dedicated hardware component for high-speed deterministic bus communications and safety I/O power routing within ProSafe-RS SIS and CENTUM VP platforms.

Hardware Specifications

Parameter	Specification
Model	SSB401-11
Brand	Yokogawa
Origin	Japan
Weight	0.9 kg
Dimensions	51 x 203 x 146 mm
Operating Temp	-20 to +70 deg C
Power Consumption	System internal regulated DC distribution
Functional Type	Safety Node Base Unit / Optical ESB Bus Repeater
Safety Integrity Level	SIL2 / SIL3 (IEC 61508 Certified)
Communication Bus	ESB Bus (Optical Repeater, Master Side)
Data Transfer Rate	128 Mbps
Fiber Connector Type	SC Connector
Isolation	Optical isolation via ESB bus

Process Control and Safety Bus Connectivity

Configured for high-reliability process environments, the SSB401-11 provides galvanic isolation and optical signal conversion across distributed network segments. The unit executes deterministic ESB bus data transfer over fiber-optic media, eliminating electrical ground loop interference between Field Control Units and I/O expansion racks. Integrated channel-to-channel isolation safeguards sensitive SIL3 safety loops against high-voltage surges, maintaining continuous 4-20 mA HART and safety logic loop integrity under severe electromagnetic conditions.

Frequently Asked Questions

Q: How does the SSB401-11 extend the ESB bus communication distance?

A: The module functions as a master-side optical repeater, converting electrical ESB bus signals into optical signals via standard SC fiber connectors for transmission up to 5 km or 50 km depending on optical configuration.

Q: What safety integrity levels are supported by the SSB401-11 base platform?

A: The unit carries TÜV SÜD certification compliant with IEC 61508 and IEC 61511 standards, supporting SIL2 and SIL3 safety instrumented functions.

Field Installation Guidelines

Mount the SSB401-11 base into the designated rack slot using four M5 screws to ensure structural stability and reliable backplane engagement. Maintain clean optical interfaces on all SC fiber connectors, applying protective dust caps on unassigned ports to prevent contamination. Ensure a minimum fiber bending radius of 30 mm during cable routing to prevent attenuation losses. Connect the main protective earth ground conductor directly to the chassis grounding terminal using a low-impedance strap before powering the node assembly.

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