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Yokogawa ANT401 Optical ESB Bus Repeater Master Module

Configured for optical signal conversion in CENTUM VP platforms, the Yokogawa ANT401-5E/A2EE2AT (ANT401-5E Optical ESB Bus Repeater Master Module) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

  • ANT401: Optical ESB Bus Repeater Master Module (for 5 km transmission)
  • -5: Standard type with no explosion protection
  • E: Basic type for -E

Hardware Specifications

Parameter Specification
Model ANT401-5E/A2EE2AT
Brand Yokogawa Electric Corporation
Origin Japan
Weight 0.3 kg
Dimensions 32.8 x 142.5 x 130 mm
Operating Temp 0 to 55 deg C
Power Consumption 0.5 A at 24 VDC
Transmission Medium Optical fiber
Transmission Distance Up to 5 km per stage
System Topology Star or chain configuration
System Compatibility Field Control Units (AFV30_/AFV40_), ESB Node Units (ANB10_/ANB11_)

4-20 mA HART Loop Protocol & Channel-to-Channel Isolation

The ANT401-5E converts electrical Extended Serial Backplane (ESB) signals into optical pulses to extend communication loops across remote racks without data latency. Complete optical-to-electrical galvanic isolation prevents high-voltage noise transients and earth potential shifts from migrating into central processors. When field nodes process 4-20 mA HART loop protocol telemetry, the ANT401-5E maintains complete channel-to-channel isolation across the network backbone, ensuring noise-free signal delivery and stable DCS bus synchronization.

Frequently Asked Questions

Q: What is the primary difference between the master and slave repeater modules in the ESB optical link?

A: The ANT401-5E acts as the master module installed in the host Field Control Unit (FCU) or main rack to convert electrical ESB signals to optical output. The slave module (such as the ANT502) resides at the remote node to convert incoming optical signals back to electrical signals.

Q: How does operating environment ambient temperature affect the mounting configuration of the ANT401-5E?

A: While standard operation ranges from 0 to 55 deg C, operation in elevated ambient environments (60 to 70 deg C) requires adherence to specific slot spacing and mounting rules to ensure heat dissipation.

Field Installation Guidelines

Mount the ANT401-5E into its designated rack slot inside the Field Control Unit or ESB Bus Node Unit. Secure the module using the top and bottom panel fastening screws to establish proper chassis bonding. Connect singlemode optical fiber patch cables to the optical ports, verifying that minimum bend radius limits are maintained to prevent attenuation losses. Ensure the module terminator configuration (/CU1T or /CU1N) matches the physical end-of-line layout of the specific ESB chain segment.

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