YOKOGAWA AIP830-001

Product Name ESB Bus Coupler / Node Interface Module (Standard Revision 01)

Product Overview The AIP830-001 is an Enhanced Serial Bus (ESB) coupler module used in Yokogawa ProSafe-RS and CENTUM systems to link the safety/control station rack with remote ESB bus I/O nodes. It extends the local I/O bus over long-distance, multi-drop cabling, enabling distributed field I/O deployment.

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Description

Technical Specifications Bus Standard: Yokogawa ESB (Enhanced Serial Bus) Topology: Multi-drop serial bus, dual-redundant capable Transmission Distance: Up to 2 km per segment (depending on cable and repeater) Node Capacity: Up to 10 remote I/O nodes per coupler Connector: Terminal block for shielded twisted-pair cable Baud Rate: Configurable, up to 10 Mbps on short segments Power Supply: 24 V DC via rack backplane Power Consumption: Approximately 6 W Operating Temperature: 0 °C to 55 °C Humidity: 5 % to 95 % RH, non-condensing Protection: Conformal-coated PCB (standard industrial version) EMC: IEC 61000-6-2 / IEC 61000-6-4

Functional Features Dual-redundant ESB bus interface with automatic switchover Optical isolation between ESB bus and rack backplane Built-in bus termination and bias resistors selectable by DIP switch Real-time diagnostics with node-level fault indication Hot-swap support in redundant coupler configurations Transparent mapping of remote I/O into controller memory

Application Scenarios Remote I/O cabinets located close to field instruments in large process plants DCS and SIS systems requiring distributed I/O over long cable runs Tank farms, wellheads, and offshore platform extensions where central rack mounting is impractical

Working Principle The coupler translates parallel backplane transactions from the controller into serial ESB frames, broadcasts them to all connected remote nodes, collects I/O data responses, and presents consolidated process data to the CPU. Redundant couplers operate in active-standby with heartbeat monitoring.

Installation Requirements Mount in the dedicated ESB coupler slot of the SCS/FCS rack Use shielded twisted-pair cable rated for industrial RS-485/422 environments Install bus terminators at the first and last nodes only Ground cable shield at one end per ESB installation manual Verify node addressing DIP switches before power-up

Usage Precautions Do not exceed the maximum node count or segment length without repeaters Avoid routing ESB cable parallel to high-voltage power lines Maintain spare coupler of identical hardware revision for SIL-rated loops Record bus load and communication status during commissioning Do not hot-swap a non-redundant coupler while the process is active

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