Description
At-A-Glance Executive Brief
- Model: ANB10D-440
- Brand: Yokogawa
- Part Type: Dual-redundant ESB Bus Node Unit for CENTUM VP DCS FIO (Field I/O) racks
- Lifecycle status: EOL legacy DCS critical spare; stocked for brownfield chemical, oil & gas, power plant CENTUM VP cabinet maintenance
- System compatibility: Yokogawa CENTUM VP / CENTUM CS3000 DCS; acts as FIO rack base node, provides dual-redundant 24VDC power supply, ESB bus communication and backplane interconnection between Field Control Unit (FCU) and all FIO I/O modules in the rack
- Weight: ~3.1 kg
Technical Introduction
Failure of ANB10D-440 ESB bus node unit will cut off ESB bus communication and rack power distribution to the entire FIO I/O rack. All analog/digital field signals connected to this rack’s I/O modules will be lost. Process transmitters, control valves, motor interlock status cannot communicate with the FCU, causing loss of closed-loop control, alarm blindness and major process upset, leading to unplanned plant shutdown and safety risks for continuous process facilities.
Yokogawa ANB10D-440 is the ESB Bus Node Unit for Yokogawa CENTUM VP DCS FIO racks. The suffix “440” denotes dual-redundant 24VDC power supply, dual redundant ESB bus, basic non-explosion protection version. This unit integrates power distribution, ESB bus interface and rack backplane, hosting multiple plug-in FIO I/O modules. It serves as the critical communication bridge between the central FCU and distributed field I/O modules over the high-speed proprietary ESB enhanced serial bus. Dual redundant power and dual ESB bus design enhance system availability to avoid single point of failure for critical process control racks. Widely deployed in chemical, refining, power and petrochemical plants. Process reliability teams stock ANB10D-440 to restore full FIO rack power and ESB communication for legacy CENTUM VP DCS systems.
- Best Suited For
- Yokogawa CENTUM VP / CS3000 DCS FIO I/O racks for chemical, oil & gas, power generation
- Dual redundant power supply and ESB bus gateway between FCU and FIO I/O modules
- Direct drop-in replacement for existing Yokogawa ANB10D-440 ESB bus node unit hardware
Core Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | ANB10D-440 |
| Manufacturer | Yokogawa |
| Product Type | ESB Bus Node Unit (FIO Rack Base Node) |
| Compatible DCS Platform | CENTUM VP, CENTUM CS3000 |
| Power Configuration | Dual-redundant 24 VDC power supply |
| Communication Bus | Dual-redundant ESB (Enhanced Serial Bus) |
| Function | Rack power distribution, ESB bus communication, I/O backplane interconnection |
| Mounting | 19-inch cabinet rack mount |
| Local Indicators | Front panel LED for Power, ESB Bus, Fault diagnostics |
| Operating Temperature | 0℃ ~ +60℃ |
| Humidity | 5–95% RH non-condensing |
| Weight | ~3.1 kg |
| Environmental Details | Please refer to Yokogawa CENTUM VP hardware manual for full EMC, shock and vibration specifications for petrochemical and power plant environments. |
Field Engineer’s Tech Notes
- Confirm full part suffix code, CENTUM VP firmware version, ESB bus terminator setup and FIO rack I/O mapping before replacement; suffix mismatch or incorrect ESB termination will cause bus communication failure.
- Implement full process safety bypass for all control loops and safety interlocks connected to this FIO rack before removing the node unit. Loss of this node disables all I/O modules on the rack.
- Inspect ESB bus cables, bus terminators, redundant power feed wiring, rack fans and cabinet dust filters; loose bus connectors and degraded power feeds are common causes of intermittent ESB communication faults.
- After installation, verify 24VDC redundant power-up, ESB bus link status, I/O module detection, FCU communication and diagnostic LED status. Test loop acquisition and valve control from operator HMI, clear faults and remove safety bypass before returning process online.
- ESD protection required while handling the unit and I/O modules.
- Perform ESB bus health check and redundant power failover testing during DCS preventative maintenance.
Adaptive QA & Testing Protocol
Each ANB10D-440 ESB bus node unit is bench tested on Yokogawa CENTUM VP FIO test rack. We verify dual redundant 24VDC power supply functionality, ESB bus communication, backplane I/O slot detection, LED diagnostic indicators. PCB, backplane connectors and internal components are visually inspected for burn marks, corrosion or thermal damage. Full test reports are available upon request.
Buyer’s FAQ
Q: What is Yokogawa ANB10D-440 used for? A: It is a dual-redundant ESB Bus Node Unit for Yokogawa CENTUM VP DCS FIO racks, providing redundant 24V power and ESB bus communication between FCU and field I/O modules.
Q: What warranty applies for refurbished and NSFP ANB10D-440? A: Refurbished and NSFP units carry a 12-month hardware warranty. Coverage excludes ESD damage, bus surge damage, incorrect ESB termination, power wiring errors and improper safety bypass.
Q: What lead time should I expect? A: Stocked units ship 3–7 business days. If inventory depleted, we source surplus Yokogawa ANB10D-440 node units.
Q: Can ANB10D-440 be hot swapped? A: Not hot-swappable. Rack 24V control power must be isolated before removal. All associated control and safety interlock loops require safety bypass before replacement.
Q: Is ANB10D-440 still in production? A: No, ANB10D-440 is end-of-life legacy DCS hardware, replaced by ANB10D-445 version.
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