TB840 3BSE021456R1 ABB AC 800M Optical Cluster Modem
Manufacturer: ABB
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Part Number: TB840 3BSE021456R1
Condition：New with Original Package
Product Type: Communication Interfaces
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB TB840 3BSE021456R1 S800 Series Optical Cluster Modem
The ABB TB840 3BSE021456R1, also cataloged as the TB840 Optical Cluster Modem, operates as a dedicated hardware component for 1+1 redundant optical communication within ABB AC 800M Control System architectures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TB840 3BSE021456R1 |
| Brand | ABB |
| Origin | Sweden |
| Weight | 0.272 kg |
| Dimensions | 160 x 157 x 80 mm |
| Operating Temp | Standard industrial range |
| Power Consumption | Drawn from Modulebus baseplate |
| Interface Type | Optical Modulebus Cluster Interface |
| Data Transfer Rate | Up to 9600 bps |
| Redundancy | 1+1 Optical Communication |
| System Compatibility | ABB AC 800M Control System |
| Superseded Model | TB840A (Pin-Compatible) |
Deterministic Backplane Communication & Optical Redundancy
The module establishes dual-channel optical links between S800 I/O clusters and main controller nodes over the optical Modulebus network. Utilizing a 1+1 redundant architecture, the hardware executes real-time channel switching to maintain deterministic network communications during single-fiber link failures. Internal processing components buffer data transmission to minimize protocol latencies, preventing communication timeouts while scaling I/O density across distributed rack configurations. Fiber optic media eliminates electrical ground loops and preserves signal integrity in high-noise industrial environments.
Frequently Asked Questions
Q: How does the TB840 handle hot-swapping during 1+1 redundant optical operation?
A: You can extract and replace a faulted TB840 module without interrupting active controller traffic, provided the redundant backup module is ONLINE and primary optical communications are active. Always verify status LEDs before disengaging the physical locking mechanism from the baseplate.
Q: Can you directly swap a legacy TB840 3BSE021456R1 with the superseded TB840A model?
A: Yes. The TB840A is fully pin-compatible with the TB840. You can mount it directly onto the existing Modulebus baseplate without altering field cabling, fiber runs, or cabinet mechanical layouts.
Field Installation Guidelines
Follow these technical procedures during field deployment to maintain hardware integrity:
- Optical Connector Care: Keep protective rubber covers over optical ports until fiber optic connectors are mated. Clean all optical fiber ferrules with isopropyl alcohol wipes before insertion to prevent signal attenuation.
- Power Isolation: Ensure the underlying Modulebus rack power or target baseplate bus is de-energized or set to hot-swap mode prior to inserting the module into its chassis slot.
- Cable Routing Restrictions: Maintain a minimum bend radius for all optical fiber cables within the cabinet wiring ducting. Never bend fiber cables sharp around metallic corners or exceed specified mechanical tension limits.
- Earth Grounding: Ensure the enclosure and DIN-rail baseplate maintain a low-impedance connection to the main cabinet ground bar to prevent electrostatic discharge buildup.