ANT401-50/CU1T Yokogawa Optical Repeater Module | New & Original Stock

Yokogawa ANT401-50/CU1T Centum VP Module

The Yokogawa ANT401-50/CU1T, also cataloged as the ANT401 Optical ESB Bus Repeater Master Module, operates as a dedicated hardware component for network synchronization and optical signal conversion within Centum VP system platforms. The hardware establishes long-distance master-to-slave communication links by transforming electrical bus frames into optical pulses for transmission over fiber optic infrastructure. It manages physical-layer data framing, ensures optical power balance across distributed architectures, and coordinates structural backplane routing sequences without altering processor cycle timings.

Suffix Breakdown & Model Matrix

• ANT401: Base model code for the Optical ESB Bus Repeater Master Module platform architecture.
• -5: Standard module type variant configured with no explosion protection barriers.
• 0: Basic functionality configuration profile identifier.
• /CU1T: Connector unit sub-assembly featuring an integrated physical terminator for the electrical ESB bus.

Hardware Specifications

Process Control Loops and Analog Field Configurations

The optical transmission unit separates localized electrical backplane tracks from distributed field channels operating the 4-20 mA HART loop protocol. By converting communications to optical media, the module establishes complete galvanic isolation, neutralizing ground potential differentials and blocking electromagnetic interference (EMI) generated by field-side surges. This prevention of high-frequency signal bleed preserves electrical reference baselines for adjacent I/O modules executing analog conversions, cold junction compensation (CJC), or high-density channel-to-channel isolation.

Frequently Asked Questions

Q: How is the physical network segment affected if the integrated /CU1T connector unit is detached while the system is live?

A: Detaching the /CU1T connector drops the required electrical termination across the local bus line. This causes instant impedance mismatches, signal reflections, and data frame corruption, resulting in an active bus fault that will interrupt adjacent processing slots.

Q: Does the ANT401-50/CU1T master module support direct connection to field transmitters or sensors?

A: No. This hardware functions strictly as a bus repeater subsystem component. It must be paired with a compatible downstream optical slave repeater module to decode the optical signals back into standard electrical backplane bus logic before interfacing with I/O cards.

Q: Is hot-swap module extraction permitted within an active, synchronized duplex rack configuration?

A: No. The underlying Centum VP hardware frame architecture does not support live hot-swap execution for this class of interface repeater. The system and rack power must be completely isolated before extracting or inserting the module to prevent electrical damage.

Field Installation Guidelines

• Completely isolate the main power infrastructure feeding the controller rack before inserting or removing the master module.
• Maintain the manufacturer-specified minimum bending radius for all dual-core fiber optic lines to prevent micro-fractures and optical signal attenuation.
• Verify that the integrated /CU1T connector unit is firmly seated and locked to provide correct line termination for the local electrical segment.
• Route all fiber optic runs through dedicated conduits, isolated from high-voltage motor starters and high-current AC cabling networks.
• Ensure all optical ports and cable connectors are fully cleaned using industrial-grade lint-free wipes before mating the physical interfaces.