Yokogawa ANB10S ESB Bus Node Unit

Suffix Breakdown & Model Matrix

Hardware Specifications

4-20mA Loop and HART Protocol Integration

The ANB10S supports standard 4-20 mA current loops for analog signal transmission, maintaining compatibility with HART protocol multiplexing on shared pairs. Channel isolation is maintained to prevent ground loop formation during multi-node installations. This ensures consistent signal integrity across the ESB backbone when connected to N-IO and FIO modules operating under varying field device loads.

Frequently Asked Questions

Q: Can the ANB10S support hot-swapping of I/O modules?

A: No. Power must be removed from the node unit before installing or removing I/O modules to prevent backplane damage and ensure safe electrical disconnection.

Q: What is the maximum number of ANB10S units per FCU?

A: Up to 13 node units can be connected per Field Control Unit, combining ANB10 and ANB11 variants on a single ESB bus segment.

Q: Does the ANB10S provide intrinsic safety barriers?

A: No. Intrinsic safety must be implemented externally using certified isolators; the ANB10S provides galvanic separation between the ESB bus and I/O modules but does not limit energy for hazardous areas.

Field Installation Guidelines

Mount the ANB10S into a standard 19-inch rack using four M5 screws. Ensure adequate spacing for ventilation to maintain ambient temperature limits. Use shielded twisted-pair cable for ESB bus connections, grounding the shield at one end only. Tighten power terminals to the specified torque using M4 screw connectors, verifying no loose strands are present. For dual-redundant power configurations, confirm phase matching before energizing both supplies.