Description

ABB DKTFM418B 3BHB015651P0001

1. Basic Information

ABB DKTFM418B (Part No. 3BHB015651P0001) is a high-speed redundant optical fiber communication interface module dedicated for ABB System 800xA and AC800M DCS control systems. It serves as the core network transmission unit for data interaction between controllers, remote I/O stations and host monitoring systems.

Adopting full optical fiber isolation design, the module completely eliminates EMI interference and signal attenuation defects of traditional copper cables. It supports dual-ring redundant networking and online hot-swap, ensuring non-stop system operation and high-reliability long-distance communication. Widely used in petrochemical, power and metallurgical industries for system network renovation, fault replacement and remote I/O expansion.

2. Core Technical Specifications

2.1 Communication & Bus Parameters

Model: DKTFM418B, Part No.: 3BHB015651P0001
Type: High-speed Redundant Optical Fiber Communication Module
Compatible System: ABB System 800xA DCS, AC800M Controller Series
Transmission Medium: Industrial multi-mode optical fiber
Network Topology: Point-to-point / Dual-ring redundant network
Max Transmission Distance: 2000 meters per link
Performance: High throughput, low delay, high synchronization accuracy
Redundancy Mechanism: Millisecond-level automatic switchover for link faults

2.2 Electrical & Operation Parameters

Power Supply: 24VDC industrial standard power supply
Power Consumption: Low power design with low temperature rise
Isolation Performance: Complete photoelectric isolation, no ground loop interference
Anti-interference: Immune to EMI and industrial strong electromagnetic interference
Maintenance: Support online hot-swap without system shutdown
Software Compatibility: Fully compatible with Control Builder M

2.3 Environmental & Physical Parameters

Operating Temperature: 0℃～+60℃
Storage Temperature: -40℃～+85℃
Humidity Range: 5%～95%RH (Non-condensing)
Vibration Resistance: Industrial reinforced structure for stable operation
Protection Grade: IP20 (Front Panel)
Structure: Compact modular design for cabinet space saving

3. Features

Full Optical Isolation & Anti-interference: Optical fiber transmission completely isolates electrical interference and potential difference, avoiding network jitter, packet loss and code errors in complex industrial environments.
Dual-ring Redundant Fault Tolerance: Real-time data synchronization of master and standby links ensures millisecond-level switchover without data loss or control disturbance during single link failure.
Long-distance Stable Networking: Supports 2km ultra-long-distance transmission without signal attenuation, realizing cross-workshop and cross-region remote I/O networking.
Non-stop Hot Maintenance: Online hot-swap function allows module replacement without system shutdown, greatly reducing production downtime loss.
Full-link Self-diagnosis: Real-time monitoring of optical power, link status and hardware faults, supporting accurate fault location and visual troubleshooting.
Strong System Adaptability: Plug-and-play with System 800xA, convenient configuration, suitable for system expansion, renovation and spare replacement scenarios.

4. Working Principle

Power-on Initialization & Self-test: The module completes hardware self-inspection, optical port detection and protocol initialization after power-on, scans network stations and establishes stable optical communication links.
Photoelectric Signal Conversion: Converts electrical control signals into optical signals for long-distance transmission, and converts field I/O optical signals back to electrical signals for controller recognition.
Redundant Link Synchronization: Master and standby links synchronize data in real time to ensure consistent transmission data and system timing.
Automatic Fault Switchover: Triggers redundant switchover immediately in case of link breakage or optical power attenuation to ensure uninterrupted communication.
Status Diagnosis & Upload: Monitors link loss and hardware status in real time, uploads fault codes and abnormal information for traceability and maintenance.
High-speed Data Interaction: Ensures high-precision and low-delay transmission of control commands and process data to support stable closed-loop operation of the DCS system.

5. Applications

5.1 Long-distance Remote I/O Networking

Solves the problems of insufficient transmission distance and signal attenuation of traditional buses for scattered field equipment, realizing stable long-distance remote I/O communication.

5.2 Strong Electromagnetic Interference Scenarios

Widely used in metallurgy, power transformation and high-power equipment workshops, using optical isolation characteristics to completely avoid EMI-induced network flash break and control abnormality.

5.3 Key Process Redundant Network

Builds dual-ring redundant communication architecture for critical continuous production devices, eliminating system shutdown risks caused by single-point link failure.

5.4 Legacy System Upgrading & Renovation

Upgrades traditional copper cable networks to high-reliability optical fiber redundant networks, improving system anti-interference ability and long-term operation stability.

5.5 System Expansion & Spare Replacement

Supports rapid I/O point expansion and faulty module in-situ replacement without modifying system configuration, reducing operation and maintenance costs.