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- Warehouse: Spot
- Warranty： 365 days
- Quality: Original module
- Condition： New
- Shipping method: Courier delivery
- Contact person: LI MING
- Contact number: +86 18059884790
- WeChat：18059884790
- E-mail: plc66@qq.com
Yokogawa ANB11D-B15/BU2A Optical ESB Bus Node Unit
Product Brief Description
Yokogawa ANB11D-B15/BU2A is a dual-redundant optical ESB bus node repeater unit for Yokogawa CENTUM VP DCS. The suffix -B15 means dual redundant 24VDC power supply, basic non-explosion-proof version; /BU2A refers to ESB bus connector unit without built-in terminator. It converts electrical ESB signals into optical signals to realize long-distance communication between FCU and remote FIO I/O racks.
Product Functions
- Optical-electrical signal conversion and repeater amplification for ESB bus communication
- Dual redundant 24VDC power input to guarantee uninterrupted control network operation
- /BU2A ESB bus connector assembly, external terminator needs to be configured separately
- Bridge real-time data exchange between AFV series FCU and remote FIO I/O nodes via fiber
- Isolate electrical interference through optical fiber transmission for stable remote I/O communication
- Front panel LED indicators for power, bus link status and fault diagnosis
- Support hot-swap and automatic redundant bus switching during system operation
Application Scenarios
- Yokogawa CENTUM VP DCS for petrochemical, refinery and natural gas plants
- Thermal power station, combined cycle turbine and boiler control systems
- Chemical, pharmaceutical and water treatment distributed process control
- Long-distance remote I/O layout across separate control cabinets or buildings
- DCS cabinet reconstruction, spare replacement and system expansion projects
FAQ
Q: What do B15 and /BU2A stand for?
A: B15 = dual redundant 24VDC power, basic non-explosion-proof; /BU2A is ESB connector unit without terminator, terminator must be added externally.
Q: What is the difference between /BU2A and /BU2B?
A: /BU2A has no built-in terminator; /BU2B comes with integrated bus terminator, they cannot be mixed directly without matching termination.
Q: What is the difference between ANB11D and ANB10D?
A: ANB11D is optical ESB repeater for long fiber runs; ANB10D is electrical ESB node for short in-cabinet FIO connections.
Q: Which FCU models are compatible?
A: It matches AFV30D and AFV40D dual-redundant field control units of CENTUM VP DCS.
Q: Is this module still available from Yokogawa?
A: It is a mature DCS spare part. New surplus stock and refurbished units are mainly supplied for maintenance of existing CENTUM VP installations.
