SNT401-13 Yokogawa ProSafe-RS Series Datasheet & Technical Manual

Yokogawa SNT401-13 ProSafe-RS Optical ESB Bus Repeater Master Module

Yokogawa SNT401-13 ProSafe-RS Optical ESB Bus Repeater Master Module

Availability: 10 left in stock

Yokogawa SNT401-13 Optical ESB Bus Repeater Master Module Configured for optical transport of ESB Bus signals in ProSafe-RS Safety Instrumented...

SKU: SNT401-13

Manufacturer: Yokogawa
Product No.: SNT401-13
Product Type: Optical Bus Repeater Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa SNT401-13 Optical ESB Bus Repeater Master Module

Configured for optical transport of ESB Bus signals in ProSafe-RS Safety Instrumented System and CENTUM VP/CS 3000 networks, the Yokogawa SNT401-13 (Yokogawa SNT401 Optical ESB Bus Repeater Master Module) provides direct physical/electrical execution. The module converts electrical copper-based communication backplane signals into optical media formats to facilitate long-distance serialization without electromagnetic interference degradation. It establishes deterministic master-to-slave distribution links when mated to corresponding field receiving nodes across remote I/O topologies.

Hardware Specifications

Parameter	Specification
Model	SNT401-13
Brand	Yokogawa
Platform	ProSafe-RS Safety Instrumented System / CENTUM VP / CENTUM CS 3000
Origin	Japan
Weight	0.3 kg
Dimensions	22 x 124 x 126 mm
Operating Temp	-20 to +70 deg C
Power Consumption	0.5 A current consumption (supplied via base unit backplane)
Network Topologies	Star or chain configurations
Maximum Connection Stages	2 stages
Transmission Distance Limit	Up to 5 km per single stage (10 km maximum across dual stages with Vnet/IP R1.03+)
Enclosure Compliance	ISA G3 corrosion resistance (suffix -3 qualified hardware)
Mounting Installation	SNT10D unit rack enclosure slot matrix
Slot Assignment Configuration	Odd slots allocated for Bus 1; even slots allocated for Bus 2
Mating Peripheral Interface	SNT501 Slave Module or S2EN501 N-ESB Bus Module

Process Control Loops and DCS Instrument Integration

The optical master module processes high-speed backplane signals to maintain synchronous data exchange over extended distances for 4-20 mA HART loop protocol clusters connected to remote node segments. Galvanic isolation and complete optical decoupling protect the core control rack against ground potential differentials that develop over multi-kilometer runs between processing cells. By providing total immunity to high-voltage transients within the serial stream, the unit stabilizes data frame integrity across distributed junction environments and prevents channel-to-channel isolation faults inside remote termination sections.

Frequently Asked Questions

Q: How must the master module be arranged to support a fully redundant duplex bus architecture?

A: Duplex configuration requires installing separate modules into the designated slot matrix of the SNT10D rack, assigning the primary module to an odd-numbered slot for Bus 1 and the redundant backup module to an even-numbered slot for Bus 2.

Q: Can the optical interface parameters change when updating the software platform to Vnet/IP?

A: The physical optical drive mechanism remains constant, but upgrading to Vnet/IP R1.03+ enabling logic allows the hardware matrix to extend maximum end-to-end chain transmission limits to 10 km over two connection stages.

Q: Does this module require standalone external thermal cooling mechanisms when fully loaded?

A: No. The internal circuitry uses efficient thermal dissipation pathways designed to operate using natural convection cooling profiles within standard industrial control enclosures up to +70 deg C.

Field Installation Guidelines

Optical Fiber Bend Radius Maintenance: Maintain the minimum recommended bend radius constraints for the fiber optic patch cables inside the marshalling cabinet to prevent attenuation loss and signal distortion.
Slot Allocation Adherence: Verify the physical slot number before inserting the module into the SNT10D unit rack to prevent overlapping Bus 1 and Bus 2 logic configurations.
Dust Cap Conservation: Keep protective optical dust caps installed on all unused transceiver fiber ports at all times to avoid airborne particulate contamination on the internal optical lenses.
Cabinet Earthing Integration: Connect the SNT10D unit rack chassis directly to the master instrumentation earth terminal network using a low-impedance conductor to minimize stray common-mode noise.

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