Description
The DDK NET-801RM3-S is a specialized Network Repeater/Bridge Module designed for high-reliability industrial communication networks. It is primarily used to extend signal distance, provide galvanic isolation, and manage network topology in harsh electromagnetic environments.
Product Parameters (Datasheet)
- Model Number: NET-801RM3-S
- Manufacturer: DDK (Dai-ichi Denshi Kogyo)
- Function: Network Repeater / Signal Conditioner
- Interface Ports: Dual High-Speed Industrial Network Ports
- Data Rate: Supports 10/100 Mbps (Auto-negotiating)
- Isolation Voltage: 1500V AC / 2500V DC (Port-to-Port and Port-to-Power)
- Supply Voltage: 24 V DC (Standard industrial range)
- Mounting: 35mm DIN rail or panel mount
- Status Indicators: LED diagnostics for Power, Link/Activity, and Collision/Error
DDK NET-801RM3-S
DDK NET-801RM3-S
DDK NET-801RM3-S
Country of Origin
This precision networking component is engineered and manufactured by DDK (Dai-ichi Denshi Kogyo) in Japan, ensuring high standards for industrial durability and signal integrity.
Application Fields
The NET-801RM3-S is utilized in large-scale automated environments:
- Automotive Assembly: Extending network segments across long production lines without signal degradation.
- Warehouse Automation: Bridging communication between stationary controllers and mobile robotic tracks.
- Power Substations: Providing electrical isolation between network segments to prevent surge damage from high-voltage equipment.
- Semiconductor Manufacturing: Maintaining clean, noise-free communication for high-precision tool control.
- Mining & Heavy Industry: Enhancing signal strength in environments with high levels of electromagnetic interference (EMI).
Product Usage Instructions
- Placement: Install the repeater between two network segments where the cable length exceeds the standard limit (e.g., 100 meters for copper Ethernet) or where electrical isolation is required.
- Wiring: Connect the incoming network cable to Port 1 and the outgoing cable to Port 2. Use shielded Cat5e or Cat6 cables for optimal performance.
- Powering: Apply a stable 24V DC power source. Ensure the polarity is correct to prevent damaging the internal protection circuits.
- Grounding: Connect the module’s frame ground terminal to the cabinet’s common ground point to maximize its noise-filtering capabilities.
- Monitoring: Observe the “ERR” or “COL” LEDs during the initial startup. If they flash red, check for cable shorts or excessive network traffic (collisions).
Product Technical Description
The NET-801RM3-S functions as an Active Repeater. Unlike a passive bridge, it receives weakened or noisy digital signals, retimes them, and regenerates them to full signal strength before retransmission. This process eliminates “jitter” and ensures data packets remain intact over long distances. Technically, the module features 3-way isolation, separating the input, output, and power circuitry. This is vital in preventing “ground loops,” which can cause subtle data corruption or catastrophic hardware failure in large plants. The “S” revision typically denotes a slim or compact housing, optimized for saving space in modern control cabinets.
Q&A (Common Questions)
- Q: Does this module require a software IP address?
- A: No, the NET-801RM3-S typically operates at Layer 1 (Physical Layer). It is “transparent” to the network and does not require software configuration or an IP address.
- Q: Can I use this for Fiber Optic cables?
- A: This specific model is designed for copper (RJ45/Twisted pair) interfaces. For fiber, a different media converter module would be required.
- Q: What is the maximum number of repeaters I can chain together?
- A: While it regenerates signals, you should generally follow the “5-4-3 rule” (or modern Ethernet equivalents) to avoid excessive latency. Chaining more than three repeaters in a single path is usually not recommended.
- Q: Is it compatible with Profinet or EtherCAT?
- A: Yes, since it acts at the physical level, it is compatible with most Ethernet-based industrial protocols.
Similar Model Recommendations
- DDK NET-801RM2: Earlier version or variant with different port configurations.
- DDK NET-SW805: Industrial-grade 5-port network switch.
- Phoenix Contact FL ISOLATOR: Generic Ethernet isolator alternative.
- Hirschmann SPIDER: Entry-level industrial repeater/switch series.
- DDK NET-EXT-100: Long-distance network extender.
For technical documentation or a formal quote on the DDK NET-801RM3-S, please contact our industrial networking team.
