ANT502-50 Yokogawa Dual Redundant ER Bus Node Unit

Hardware Specifications

Yokogawa DCS Communication and Signal Interface Characteristics

The ANT502-50 manages ER Bus communication between field-side I/O assemblies and the Field Control Unit. Therefore, it transfers analog I/O and contact I/O data through the configured bus architecture while supplying operating power to connected I/O modules.

In addition, the unit supports redundant ER Bus configurations for CENTUM VP architectures. The node capacity depends on the connected FCU model and installed database configuration. For example, AFV30 supports up to 3 ESB Bus Units and Optical ESB Bus Node Units, while AFV40 supports higher node expansion configurations with additional Node Expansion Packages.

The ANT502-50 is designed for Yokogawa process control environments requiring structured DCS I/O communication. Furthermore, Yokogawa systems integrate channel-to-channel isolation methods and process signal management functions to maintain stable field communication with supported I/O modules.

Frequently Asked Questions

Q: Can the ANT502-50 connect directly to an FCU without additional interface hardware?
A: No. The ANT502-50 requires an ESB Bus Couple Module such as EC401 or EC402 when connecting to supported FCU models.

Q: What power input options are available for the ANT502-50?
A: The unit supports 100-120 VAC, 220-240 VAC, and 24 VDC power supply configurations according to the selected suffix code.

Q: Does the ANT502-50 support redundant ER Bus operation?
A: Yes. The ANT502-50 is configured as a Dual Redundant ER Bus Node Unit for compatible CENTUM VP system architectures.

Field Installation Guidelines

Install the ANT502-50 in a 19-inch rack using the specified mounting hardware. Confirm that the rack provides sufficient mechanical support for the unit weight, including installed I/O modules.

Connect the ER Bus interface through the required ESB Bus Couple Module and verify that the FCU database configuration matches the installed node quantity.

Route power wiring separately from field signal wiring to reduce electrical interference. Use appropriate grounding methods for the rack structure and cable shields according to site electrical standards.

Before applying power, verify the selected voltage configuration matches the installed power supply specification. Confirm communication status between the ANT502-50, FCU, and connected I/O modules during system commissioning.