Phoenix 1004N-FX Terminal Block

Phoenix 1004N-FX Terminal Block (IMPORTANT: actually an industrial DIN-rail Ethernet switch, not a terminal block)

 

 

The model “1004N-FX” is not a terminal block. It is a Phoenix Contact unmanaged industrial Ethernet switch (FL SWITCH 1004N-FX) used in automation control cabinets.

Product Information

• Brand: Phoenix Contact (Germany)
• Model: FL SWITCH 1004N-FX
• Type: Industrial Ethernet switch (not terminal block)
• Ports:
  • 4 × RJ45 Ethernet ports
  • 1 × fiber optic SC port
• Speed: 10/100 Mbps
• Mounting: DIN rail
• Function: Network data switching in PLC/DCS systems
• Power supply: 24V DC industrial control power

What it actually is

This device is used to connect industrial automation equipment into a network, such as:

• PLC controllers
• HMI panels
• DCS systems (Foxboro, Siemens, etc.)
• Remote I/O modules
• Industrial PCs

It does NOT connect wires like a terminal block.

System Role (Simple)

PLC / DCS / HMI devices
→ Phoenix 1004N-FX switch (this unit)
→ Ethernet network communication
→ control system data exchange

So it acts like a “network traffic hub for industrial automation.”

Key Features

• Industrial unmanaged Ethernet switch
• 4 copper + 1 fiber optic port
• DIN rail installation
• Automatic speed detection (10/100 Mbps)
• Plug-and-play (no configuration needed)
• Designed for harsh industrial environments

Typical Applications

• Factory automation networks
• PLC communication systems
• DCS networking (Foxboro / Honeywell systems)
• Industrial Ethernet backbone
• Machine-to-machine communication
• Control cabinet networking

Important Notes

• Not terminal block ❌
• Not relay ❌
• Not I/O module ❌
• Not power supply ❌
• It is a network Ethernet switch (industrial communication device) ✔

Precautions

• Requires stable 24V DC supply
• Fiber port requires correct SC connector type
• Should be installed in grounded control cabinet
• Avoid dust/overheating for stable network operation
• Do not confuse with terminal blocks (completely different category)