We will arrange delivery within 3-5 days after receiving the payment.

Our express delivery: DHL and FedEx.

Quality packing for each product

Destination country all taxes & duty to be paid by buyer

Only part of the brand and model, if you have other product needs, please contact us.

ABB TB820 Optical Trunked Modem

1. Product Overview

2. Core Specifications

3. Key Functions

3.1 Long-Distance Optical Data Transmission

• Dual-Signal Support: Transmits both ABB’s proprietary CEX bus signals (for AC 800M controller-I/O rack communication) and standard Ethernet signals (for SCADA/HMI connectivity). For example, it can link a central AC 800M controller (in a main control room) to a remote S100 I/O rack (20km away in a power plant’s turbine hall) via single-mode fiber.
• High-Speed, Low-Latency: Maintains 100Mbps full-duplex data rate for CEX bus and 10/100Mbps for Ethernet, with latency <1ms—critical for time-sensitive DCS tasks (e.g., real-time valve control, emergency shutdown signals).
• EMI Immunity: Optical fiber transmission is immune to EMI from high-voltage power cables, motors, or welding equipment (common in industrial sites). Unlike copper cables, it avoids signal distortion or data loss caused by electrical interference.

3.2 Redundancy & Fault Tolerance

• Dual Fiber Paths: Two TB820 modems can be paired to form a redundant optical link (primary/backup paths). If the primary fiber is damaged (e.g., digging accident in a refinery), the system automatically switches to the backup path within <100ms—no disruption to DCS operation.
• Link Monitoring: Continuously checks optical signal strength (received power: -30dBm to -10dBm for SM). If signal strength drops below a threshold (e.g., -28dBm, indicating fiber degradation), it triggers a local alarm and sends diagnostic data to the AC 800M controller.

3.3 Diagnostics & Status Monitoring

• LED Status Indicators:
  • Green "POWER": Illuminates when the modem is powered.
  • Green "CEX/Ethernet": Flashes for active data transmission; solid for link established.
  • Green "OPTICAL": Flashes for normal optical signal; solid for no signal (fiber fault).
  • Red "FAULT": Lights for low optical power, electrical isolation failure, or internal hardware error.
• Diagnostic Data Over Ethernet: Transmits optical link parameters (e.g., received power, signal-to-noise ratio) and fault codes (e.g., "0x04: Low Optical Power") to the AC 800M controller or SCADA system—enabling remote troubleshooting (e.g., identifying a faulty fiber splice without on-site visits).

3.4 Flexible Deployment

• Fiber Type Flexibility: Supports both single-mode (long-distance, 20–40km) and multi-mode (short-distance, 2–5km) fiber—no need for separate modems for different fiber infrastructures.
• Outdoor Compatibility: Optional IP65 enclosure protects the modem from rain, dust, and temperature extremes (e.g., mounting on an outdoor pump station in a desert power plant).
• Hot-Swap Capability: Can be replaced without powering down the DCS (when used in redundant pairs)—minimizes downtime during maintenance.

4. Core Advantages

1. Long-Distance, Interference-Free Communication
   Transmits data up to 40km (single-mode fiber) without EMI issues—eliminates the need for signal repeaters (common with copper cables) and reduces infrastructure costs by 40%.
2. High Reliability for Critical DCS Links
   Redundant fiber paths and <100ms switchover time meet the availability requirements of safety-critical systems (e.g., nuclear power plant auxiliary control, petrochemical emergency shutdown loops).
3. Simplified Maintenance
   Remote diagnostic monitoring and LED status indicators reduce on-site troubleshooting time—technicians can identify fiber faults (e.g., a broken cable) from the main control room, cutting maintenance costs by 30%.
4. Wide Environmental Adaptability
   -40°C~+70°C operating range and optional IP65 enclosure enable deployment in extreme environments (arctic pipelines, desert refineries) where standard modems fail.

5. Typical Applications

5.1 Power Plant Remote I/O Link

• Use Case: Connects a central AC 800M controller (main control room) to a remote S100 I/O rack (15km away at a cooling tower) in a 1000MW coal-fired power plant.
• Configuration: TB820 with single-mode fiber (1310nm, 15km); redundant pair for fault tolerance.
• Value: EMI immunity avoids signal interference from high-voltage power lines; redundant links prevent cooling system control loss.

5.2 Petrochemical Refinery SCADA Connectivity

• Use Case: Transmits Ethernet data between a refinery’s central SCADA system and a remote pump station (2km away) via multi-mode fiber.
• Configuration: TB820 with multi-mode fiber (850nm, 2km); IP65 enclosure for outdoor mounting.
• Value: Optical transmission resists EMI from nearby pump motors; IP65 enclosure protects against refinery dust and rain.

5.3 Mining Complex DCS Expansion

• Use Case: Links an underground AC 800M controller (mining shaft) to a surface-based operator station (5km away) via single-mode fiber.
• Configuration: TB820 with single-mode fiber (1550nm, 5km); redundant paths to avoid downtime from underground fiber damage.
• Value: Long-distance transmission eliminates the need for underground repeaters; low latency ensures real-time monitoring of mining equipment.

6. Usage Notes

1. Fiber Compatibility Check
   • Match fiber type (SM/MM) to transmission distance: Use SM for >2km, MM for ≤2km.
   • Ensure fiber connectors (SC/LC, configurable) match site infrastructure—use ABB-approved connectors (e.g., SC-UPC) to avoid signal loss.
2. Optical Power Calibration
   • Measure received optical power after installation (target: -30dBm to -10dBm for SM, -25dBm to -10dBm for MM).
   • Avoid exceeding maximum input power (-10dBm)—use an optical attenuator if needed (prevents modem damage).
3. Redundancy Setup
   • When configuring redundant links, use two separate fiber paths (e.g., different trenches in a refinery) to avoid simultaneous damage (e.g., from a single digging accident).
   • Enable auto-switchover via AC 800M Control Builder M software—set switchover threshold to -28dBm (SM) or -23dBm (MM).
4. Outdoor Installation
   • Use the optional IP65 enclosure (ABB part no. 3HAC032100-001) for outdoor deployment; ensure the enclosure is mounted 1.5m above ground (avoids waterlogging).
   • Seal fiber entry points with waterproof glands (ABB part no. 3HAC032101-001) to prevent moisture ingress.
5. Genuine Spare Parts
   Use only ABB-approved optical modules and cables—counterfeit parts may have incorrect wavelength or power ratings, causing signal failure or modem damage. Verify authenticity via ABB’s global support portal

The structure and details of the product：

 Please make an inquiry for more models

ABB SDCS-CON-2A

ABB SDCS-CON-2B

ABB SDCS-CON-2A

ABB SDCS-PIN-41A

ABB SDCS-PIN-46 

ABB SDCS-FEX-425

ABB SDCS-FEX-4

ABB SDCS-DSL-4

ABB SDCS-FEX-425

ABB 3BHB001337R0002

ABB 3BHL000390P0104 3BHB003154R0101  5SHX1960L0004

ABB 3BHE025541R0101  PCD231B101

ABB SDCS-POW-4

ABB SDCS-PIN-51

ABB SDCS-CON-4

ABB SDCS-FEX-2A

ABB SDCS-CON-2A/2B

ABB SDCS-CON-2-21

ABB SDCS-CON-52

ABB SDCS-CON-21

ABB SDCS-CON-15

ABB SDCS-CON-15A

ABB SDCS-IOE2

ABB SDCS-IOE-2

ABB SDCS-UCM-1

ABB SDCS-FEP-1

ABB SDCS-CON2A-18

ABB ATMB-01C

ABB SDCS-MEM-8

ABB SDCS-COM-81

ABB SDCS-COM-82

ABB SDCS-PIN-46-COAT

ABB MCC162-16IO1

ABB KOND-DC

ABB WID-150W-FORD1D2

ABB WID-150-KTK-25

ABB SDCS-REB-1

ABB SDCS-PIN-206B

ABB SDCS-REB-2

ABB SDCS-AMC-DC2

ABB SDCS-PAR-2   7.3

ABB SDCS-FEP-2

ABB SDCS-FEP-1

ABB YT204001-FK

ABB YT204001-FC

ABB YT204001-AT

ABB YT204001-FS

ABB YT204001-CK

ABB YT204001-JN

ABB YT204001-KA

ABB YT204001-JF

ABB YT204001-KF

ABB YT204001-JB

ABB YT204001-FP

ABB YT204001-BM

ABB YT204001-JD

ABB YT204001-FL

ABB YT204001-JA

ABB YT204001-CP

ABB YT204001-AZ

ABB YT204001-AB

ABB YPI103A

ABB YT204001-BP

ABB YT204001-BN

ABB YT204001-BG

ABB YT204001-KB

ABB CI547 3BNP004429R1

ABB ABB DS201B10A10

ABB ABB LTC745A101  3BHE039905R0101

ABB ABB TP854  3BSE025349R1

ABB ABB TB852

ABB ABB PM861K01

ABB ABB PM860K01

Other best-selling products：