ABB TB846 ModuleBus Optical Fiber Link Adapter
Manufacturer: ABB
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Part Number: TB846 3BSE021439R1
Condition：New with Original Package
Product Type: Communication Modules
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Configured for high-speed ModuleBus extension in S800 I/O subsystems, the ABB TB846 (3BSE021439R1 ModuleBus Optical Fiber Link Adapter) provides direct physical signal conversion from electrical to optical formats. This adapter facilitates the distribution of I/O clusters across distances up to 2000 m, utilizing multimode fiber-optic media to ensure immunity against electromagnetic interference within industrial network platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TB846 (3BSE021439R1) |
| Brand | ABB |
| Origin | Manufacturing Sites |
| Weight | 0.2 kg |
| Dimensions | 45 mm x 120 mm x 75 mm |
| Operating Temp | -20 deg C to +55 deg C |
| Power Consumption | <= 3 W |
| Communication Medium | Multimode optical fiber |
| Max Distance | 2000 m |
Profinet / EtherNet/IP Deterministic Networks and I/O Scaling
The TB846 module manages backplane bus communication velocity by ensuring that signal conversion does not introduce deterministic jitter within the S800 I/O bus cycles. By maintaining I/O density scaling through fiber-optic links, the adapter allows for modular expansion of the controller's address space without exceeding physical segment limitations. The internal logic handles firmware flash compatibility to synchronize with the host AC 800M controller, ensuring that the optical transmission maintains the same scan-time performance as local electrical bus segments.
Frequently Asked Questions
Q: Can the TB846 be used for redundant ModuleBus configurations?
A: Yes. The TB846 acts as a component of the redundant ModuleBus cable adapter system when paired with TB845 units, allowing for fault-tolerant I/O cluster connectivity.
Q: What determines the maximum communication distance of 2000 m?
A: The maximum distance is primarily governed by the signal attenuation characteristics of the specific multimode fiber-optic cable used and the optical power budget of the TB846 transmitters and receivers.
Q: Does the module require specific fiber-optic termination types?
A: The module is compatible with standard industrial multimode fiber connectors. Ensure the fiber end-faces are cleaned according to industry standards prior to connection to prevent signal loss.
Field Installation Guidelines
- Mount the TB846 on a 35 mm DIN rail, ensuring the locking clip is fully engaged to maintain a secure electrical ground to the rail.
- Route the fiber-optic cables through dedicated conduits to prevent mechanical stress or micro-bends that exceed the minimum bend radius.
- Clean all optical connectors with lint-free wipes and isopropyl alcohol before insertion into the TB846 interface ports.
- Verify the 24 VDC power supply voltage; ensure the connector is fully seated to prevent intermittent power cycles that would reset the link.
- Monitor the link status LEDs during startup; a solid indication confirms an active optical handshake between the controller and the remote I/O cluster.