SNT401-53 S1 Yokogawa CENTUM VP Datasheet & Technical Manual

SNT401-53 S1 Yokogawa CENTUM VP Optical ESB Bus Repeater Module

SNT401-53 S1 Yokogawa CENTUM VP Optical ESB Bus Repeater Module

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Yokogawa SNT401-53 S1 Extended Serial Backplane Bus Repeater Module Configured for long-distance extension of the ESB bus in CENTUM VP...

SKU: SNT401-53 S1

Manufacturer: Yokogawa
Product No.: SNT401-53 S1
Product Type: Network Interface Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa SNT401-53 S1 Extended Serial Backplane Bus Repeater Module

Configured for long-distance extension of the ESB bus in CENTUM VP platforms, the Yokogawa SNT401-53 S1 (SNT401 Network Interface Module) provides direct physical/electrical execution. This module converts electrical Extended Serial Backplane signals into optical impulses for noise-immune transmission over fiber optic links to remote I/O nodes. The unit integrates standard backplane interface logic, ISA G3-compliant conformal coating for harsh atmosphere resistance, and hardware-level dual-redundant switching protocols across FCU card cages.

Suffix Breakdown & Model Matrix

Suffix / Option Code	Technical Specification / Configuration Details
SNT401	Base model designation for Optical ESB Bus Repeater Module
-53	Standard-type hardware module with ISA G3 conformal coating for enhanced protection in corrosive industrial environments
S1	Designates the specific hardware revision level and internal interface parameter set

Hardware Specifications

Parameter	Specification
Model	SNT401-53 S1
Brand	Yokogawa
Origin	Japan
Weight	0.3 kg (Net)
Dimensions	2.2 cm x 12.4 cm x 12.6 cm
Operating Temp	0 to +55 deg C
Power Consumption	5 V DC internal system supply (24 VDC via backplane)
Function	Optical ESB Bus Repeater Module
Transmission Medium	Multi-mode or single-mode fiber optic cabling
System Compatibility	CENTUM CS, CENTUM VP (R4.x / R5.x / R6.x)
Isolation & Protection	ISA G3 conformal coating (IEC 60068-2-6 / IEC 61000-4 EMC compliant)
Redundancy Support	Dual-redundant optical path configuration

Process Control & DCS Instrumentation Characteristics

The optical bus repeater executes signal conversion between copper ESB bus lines and fiber optic cabling to eliminate ground loops and electromagnetic interference across extended plant distances. Operating in master or slave modes, the unit routes deterministic network traffic while supporting dual-redundant optical link paths to ensure seamless failover. The internal transceiver circuitry maintains channel-to-channel and channel-to-system electrical isolation, preventing voltage transients on field I/O racks from reaching host FCU backplanes across Vnet/IP and ESB communication loops.

Frequently Asked Questions

Q: How does the SNT401-53 S1 handle module hot-swapping during active DCS operation?

A: The module supports live insertion and removal when installed in a dual-redundant rack configuration. Removing the unit triggers an immediate automatic switchover to the secondary redundant repeater path, keeping the remote I/O communication link active without interrupting host controller processing cycles.

Q: What physical optical connector types and optical fiber modes are required for linking remote nodes?

A: The module interfaces with multi-mode or single-mode optical fiber cables using standard optical connectors. Optical link power budgets must be calculated based on fiber attenuation and distance to maintain deterministic signal timing between master and slave nodes.

Q: What environmental conditions does the -53 suffix specification address?

A: The -53 designation indicates factory-applied ISA G3-compliant conformal coating. This protective layer seals internal printed circuit board traces against atmospheric contaminants, high humidity (5-95% RH non-condensing), and corrosive airborne sulfur/chlorine compounds found in process plant environments.

Field Installation Guidelines

Insert the module firmly into the designated slot on the CENTUM CS/VP card cage or FCU backplane, verifying that the connector latch engages fully.
Clean all optical fiber cable end-faces with lint-free wipes and isopropyl alcohol before insertion into the transceiver ports to prevent signal attenuation from particulate contamination.
Observe minimum bend radius limits for the fiber optic patch cables during routing inside the cabinet to avoid optical signal loss and mechanical stress on the glass core.
Route optical cables away from high-voltage AC conductors and maintain proper strain relief on all field fiber connections.
Confirm cabinet convective ventilation paths are clear to maintain ambient temperatures within the specified 0 to +55 deg C operating range.

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