ABB TB840A ModuleBus Cluster Modem | S800 I/O Fiber Optic
ABB TB840A ModuleBus Cluster Modem | S800 I/O Fiber Optic
Manufacturer: ABB
Product No.: 3BSE037760R1
Condition:1000 in stock
Product Type: I/O Communication Modules
Payment: T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months
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🌐 ABB TB840A ModuleBus Cluster Modem for S800 I/O Systems
The ABB TB840A (3BSE037760R1) is a redundant fiber optic ModuleBus modem designed for distributed S800 I/O systems, enabling high-speed communication between AC800M controllers and remote I/O clusters. This hot-swappable module supports dual optical ModuleBus lines with automatic failover, connecting up to 7 clusters and 12 I/O modules per cluster, providing scalable and fault-tolerant I/O distribution for critical process control in power generation, oil & gas, and chemical manufacturing.
🔧 Technical Specifications
FIBER OPTIC MODULEBUS INTERFACE
| Part Number: | 3BSE037760R1 |
| Model: | TB840A |
| System: | ABB S800 I/O |
| Protocol: | ModuleBus (Optical + Electrical) |
| Optical Ports: | 2× Fiber optic (redundant) |
| Electrical Bus: | Up to 12 I/O modules |
| Cluster Capacity: | Up to 7 clusters per optical bus |
| Redundancy: | Line + Module redundancy |
| Hot-Swap: | Yes (online replacement) |
| Power Consumption: | 120 mA @ 24V DC (typical) |
| Operating Temp: | 0°C to +55°C (vertical: +40°C max) |
| Protection: | IP20 |
| Certifications: | CE, cULus C1 Div 2, ATEX Zone 2, ABS, DNV-GL, LR |
| Weight: | 0.2 kg (0.44 lbs) |
🏭 Distributed I/O Applications
Power Plant Control: Distributes S800 I/O across boiler control, turbine protection, and emissions monitoring systems in coal, gas, and combined-cycle plants (100-1000 MW) where fiber optic communication eliminates electrical noise interference and enables I/O placement up to 2 km from control room, reducing copper wiring costs by $50K-200K per installation.
Offshore Platform Automation: Connects remote I/O clusters in hazardous areas (Zone 2/C1 Div 2) on oil platforms and FPSOs where ATEX/cULus certification, marine approvals (ABS, DNV-GL), and corrosion protection (ISA-S71.04 G3) ensure reliable operation in harsh offshore environments with salt spray, vibration, and temperature extremes.
Chemical Process Control: Extends AC800M controller reach to distributed I/O in reactor areas, tank farms, and packaging lines where fiber optic isolation prevents ground loops and lightning-induced surges that cause 40% of I/O failures in electrically noisy industrial environments with VFDs, welding, and high-voltage equipment.
Water Treatment SCADA: Links central control to remote pump stations, filtration units, and chemical dosing systems in municipal plants processing 10-500 MGD where fiber optic ModuleBus enables distributed architecture with 500-2000 I/O points across facilities spanning 1-5 km without signal repeaters or amplifiers.
⚙️ System Architecture Benefits
Redundant Communication: Dual optical ModuleBus lines with automatic failover ensure continued operation during fiber cuts or module failures, maintaining 99.99% I/O availability in critical processes where unplanned shutdowns cost $100K-1M per hour—preventing revenue loss and safety incidents from communication failures.
Scalable I/O Distribution: Supports up to 84 I/O modules (7 clusters × 12 modules) per optical bus, enabling phased expansion from pilot plants (50 I/O) to mega-projects (5000+ I/O) without controller replacement or architecture changes, protecting capital investments and reducing lifecycle costs by 30%.
Hot-Swap Maintenance: Field-replaceable during operation without process interruption or controller reboot reduces mean time to repair (MTTR) from 4 hours to 15 minutes, eliminating costly planned outages for preventive maintenance in 24/7 continuous manufacturing where scheduled downtime windows are limited to quarterly turnarounds.
Integrated Diagnostics: Supervisory functions monitor optical signal strength, electrical ModuleBus health, and power supply status, generating predictive maintenance alerts 30-60 days before failures through 800xA System Manager, enabling proactive replacement and reducing unplanned downtime by 50%.
📦 Module Package
- 1× ABB TB840A ModuleBus Cluster Modem
- Fiber optic connectors (2× ports)
- Installation guide and wiring diagram
- Compatible terminal units: TU840 (dual bus), TU841 (single bus)
Genuine ABB product with global service support. Essential for DCS engineers, system integrators, and instrumentation technicians managing S800 I/O systems with AC800M controllers. Compatible with all S800 I/O modules, 800xA Control Builder M software, and redundant configurations using TU840/TU841 terminal units.
Product Description
🌐 ABB TB840A ModuleBus Cluster Modem for S800 I/O Systems
The ABB TB840A (3BSE037760R1) is a redundant fiber optic ModuleBus modem designed for distributed S800 I/O systems, enabling high-speed communication between AC800M controllers and remote I/O clusters. This hot-swappable module supports dual optical ModuleBus lines with automatic failover, connecting up to 7 clusters and 12 I/O modules per cluster, providing scalable and fault-tolerant I/O distribution for critical process control in power generation, oil & gas, and chemical manufacturing.
🔧 Technical Specifications
FIBER OPTIC MODULEBUS INTERFACE
| Part Number: | 3BSE037760R1 |
| Model: | TB840A |
| System: | ABB S800 I/O |
| Protocol: | ModuleBus (Optical + Electrical) |
| Optical Ports: | 2× Fiber optic (redundant) |
| Electrical Bus: | Up to 12 I/O modules |
| Cluster Capacity: | Up to 7 clusters per optical bus |
| Redundancy: | Line + Module redundancy |
| Hot-Swap: | Yes (online replacement) |
| Power Consumption: | 120 mA @ 24V DC (typical) |
| Operating Temp: | 0°C to +55°C (vertical: +40°C max) |
| Protection: | IP20 |
| Certifications: | CE, cULus C1 Div 2, ATEX Zone 2, ABS, DNV-GL, LR |
| Weight: | 0.2 kg (0.44 lbs) |
🏭 Distributed I/O Applications
Power Plant Control: Distributes S800 I/O across boiler control, turbine protection, and emissions monitoring systems in coal, gas, and combined-cycle plants (100-1000 MW) where fiber optic communication eliminates electrical noise interference and enables I/O placement up to 2 km from control room, reducing copper wiring costs by $50K-200K per installation.
Offshore Platform Automation: Connects remote I/O clusters in hazardous areas (Zone 2/C1 Div 2) on oil platforms and FPSOs where ATEX/cULus certification, marine approvals (ABS, DNV-GL), and corrosion protection (ISA-S71.04 G3) ensure reliable operation in harsh offshore environments with salt spray, vibration, and temperature extremes.
Chemical Process Control: Extends AC800M controller reach to distributed I/O in reactor areas, tank farms, and packaging lines where fiber optic isolation prevents ground loops and lightning-induced surges that cause 40% of I/O failures in electrically noisy industrial environments with VFDs, welding, and high-voltage equipment.
Water Treatment SCADA: Links central control to remote pump stations, filtration units, and chemical dosing systems in municipal plants processing 10-500 MGD where fiber optic ModuleBus enables distributed architecture with 500-2000 I/O points across facilities spanning 1-5 km without signal repeaters or amplifiers.
⚙️ System Architecture Benefits
Redundant Communication: Dual optical ModuleBus lines with automatic failover ensure continued operation during fiber cuts or module failures, maintaining 99.99% I/O availability in critical processes where unplanned shutdowns cost $100K-1M per hour—preventing revenue loss and safety incidents from communication failures.
Scalable I/O Distribution: Supports up to 84 I/O modules (7 clusters × 12 modules) per optical bus, enabling phased expansion from pilot plants (50 I/O) to mega-projects (5000+ I/O) without controller replacement or architecture changes, protecting capital investments and reducing lifecycle costs by 30%.
Hot-Swap Maintenance: Field-replaceable during operation without process interruption or controller reboot reduces mean time to repair (MTTR) from 4 hours to 15 minutes, eliminating costly planned outages for preventive maintenance in 24/7 continuous manufacturing where scheduled downtime windows are limited to quarterly turnarounds.
Integrated Diagnostics: Supervisory functions monitor optical signal strength, electrical ModuleBus health, and power supply status, generating predictive maintenance alerts 30-60 days before failures through 800xA System Manager, enabling proactive replacement and reducing unplanned downtime by 50%.
📦 Module Package
- 1× ABB TB840A ModuleBus Cluster Modem
- Fiber optic connectors (2× ports)
- Installation guide and wiring diagram
- Compatible terminal units: TU840 (dual bus), TU841 (single bus)
Genuine ABB product with global service support. Essential for DCS engineers, system integrators, and instrumentation technicians managing S800 I/O systems with AC800M controllers. Compatible with all S800 I/O modules, 800xA Control Builder M software, and redundant configurations using TU840/TU841 terminal units.