SNT501-53 S1 Yokogawa CENTUM VP Datasheet & Technical Manual

Yokogawa SNT501-53 S1 Optical ESB Bus Repeater Module

Yokogawa SNT501-53 S1 Optical ESB Bus Repeater Module

Availability: 20 left in stock

Yokogawa SNT501-53 S1 Optical ESB Bus Repeater Slave Module The Yokogawa SNT501-53 S1, also cataloged as the SNT501 Network Interface...

SKU: SNT501-53 S1

Manufacturer: Yokogawa
Product No.: SNT501-53 S1
Product Type: Network Interface Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 350g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa SNT501-53 S1 Optical ESB Bus Repeater Slave Module

The Yokogawa SNT501-53 S1, also cataloged as the SNT501 Network Interface Module, operates as a dedicated hardware component for ESB bus electrical-to-optical signal conversion within CENTUM VP, CS 3000, and ProSafe-RS platforms. Paired in a master-slave topology with the SNT401 master module, this slave repeater converts electrical Extended Serial Backplane signals into optical transmission paths across remote I/O node units and N-IO nodes. The module executes deterministic data pass-through in star or chain network topologies while providing electrical isolation across extended field distances.

Suffix Breakdown & Model Matrix

Suffix / Option Code	Technical Specification / Configuration Details
SNT501	Base model designation for Optical ESB Bus Repeater Slave Module
5	Standard layout designation with no explosion protection
3	ISA Standard G3 conformal coating and extended maintenance temperature envelope (-20 to +70 deg C)
S1	Standard option set denoting the specific hardware revision level and internal interface parameter set

Hardware Specifications

Parameter	Specification
Model	SNT501-53 S1
Brand	Yokogawa
Origin	Japan
Weight	0.3 to 0.35 kg (Shipping Weight: 3.0 kg)
Dimensions	190 x 40 x 120 mm
Operating Temp	-20 to +70 deg C (maintenance purpose)
Power Consumption	5 V DC internal rack supply (Current Consumption: 0.5 A)
Function	Optical ESB Bus Repeater Slave Module
Transmission Distance	Up to 5 km per stage (Up to 10 km total with Vnet/IP R1.03+)
Topology & Cascading	Star or chain connection layout; maximum 2 stages
Dielectric Strength	1500 V AC for 1 minute
Insulation Resistance	Greater than or equal to 100 Mohm at 500 VDC
System Compatibility	CENTUM VP, CS 3000, ProSafe-RS safety systems

Process Control & DCS Instrumentation Characteristics

Operating within DCS and Safety Instrumented System (SIS) network architectures, the unit converts high-speed electrical ESB backplane signals to optical pulses to eliminate ground loop current paths and suppress common-mode electrical interference across distant field locations. The slave repeater maintains synchronous bus timing across fiber-optic links connected to SNT401 master modules. Continuous internal self-diagnostics check signal attenuation and link status, while the ISA Standard G3 conformal coating prevents chemical corrosion on circuit traces when deployed in harsh process environments.

Frequently Asked Questions

Q: What is the maximum optical link distance achievable when cascading SNT501-53 S1 slave modules?

A: A single transmission stage supports optical distances up to 5 km. When cascading modules in a two-stage chain or star topology under systems running Vnet/IP R1.03 or later, the total maximum optical transmission distance extends up to 10 km.

Q: How does the master-slave pairing function between the SNT401 and SNT501-53 S1 modules?

A: The SNT401 resides at the primary controller or master node to convert backplane electrical ESB signals to optical signals. The SNT501-53 S1 sits at the remote node cage as a slave module, receiving the optical stream and converting it back to standard electrical ESB signals for the local I/O module backplane.

Q: What insulation and electrical isolation parameters protect the module from backplane transients?

A: The module provides an insulation resistance of at least 100 Mohm at 500 VDC and a dielectric strength rating of 1500 V AC for 1 minute. This electrical isolation prevents field voltage surges from propagating through the backplane to adjacent modules or remote host controllers.

Field Installation Guidelines

Seat the SNT501-53 S1 module firmly into its designated slot within the FIO or safety rack cage, ensuring the backplane connector locks completely into position.
Clean all fiber-optic cable connectors using lint-free optical wipes and isopropyl alcohol prior to mating with the optical transceiver ports on the front panel.
Observe specified minimum fiber bend radius guidelines during cable management to avoid optical attenuation, signal degradation, or glass fiber breakage.
Verify proper grounding by ensuring the rack chassis connects to a dedicated single-point instrument earth ground with a resistance of less than 10 ohms.
Maintain unobstructed airflow through cabinet cooling channels to ensure thermal dissipation keeps ambient operating conditions within the specified -20 to +70 deg C maintenance range.

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