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HEF1104  is Ethernet fiber switches designed to transmit and receive 1-ch 10/100 Mbps data over four  ports.  Available in industrial temperature grade, units feature half or full duplex mode and Auto-Negotiation to 10Mbps or 100 Mbps Ethernet rate without adjustments. 
The optical interfaces operate at a 100Mbps rate.No user electrical or optical adjustments are required. Features included are low power consumption, LED indicators for monitoring equipment link and performance operating status and auto resettable voltage transient fuses. With 12VDC input voltage on standalone or rackmount chassis, the HEF1104  are outstanding products for transmission of 1-ch 10/100Mbps Ethernet signals.

• 1 x 100Base SFP Ports, 4X 10/100BaseT(X) Copper Ports 
• IEEE 802.3 Compliant 
• 10/100/100Mbps、10Mbps or 100Mbps , full or half duplex mode  
• Automatic MDI / MDI-X crossover cables
• Port Loopback for Broadcast Storm Protection
• 12VDC Input Voltage (Standalone)
• Fan-less Aluminum Enclosure, IP30 protection 
• MTBF >400 000 hours

IEEE 802.3, IEEE 802.3u, IEEE 802.3X
Copper Port: 10Base-T/100Base-T(X)
SFP Port: 100Base-FX
Switch Parameters
Packet Buffer: 0.5Mbit
MAC Table: 1K
Processing Type: Store and Forward
Transmission Distance
Copper Port: Max. 100m
Fiber: Multimode (2Km), Single mode (20Km / 60Km / 100Km / 120Km selectable)
Electrical / Mechanical
Housing: Aluminum, Fan-less
Protection Class: IP30
Dimensions (W x H x D): 170mm X 160mm X 25.20mm
Weight: 500g
Installation: Standalone
Power Supply
Input Power: 12V DC
Power Consumption  
MTBF: >400,000 hours
Operating Temp: -10°C-70°C
Storage Temp: -20°C-80°C
Relative Humidity: 0% to 95% (non-condensing)
Mode Description SFP Port Copper Port Power Input
HEF1104 1 x 100Base SFP Ports, 4 X 10/100BaseT(X) Copper Ports 1 4 12V@DC

SFP Port Options
SFP Port Interface ◆SC   ◆FC  
Fiber Type ◆Multimode   ◆Singlemode  
Fiber ◆Simplex    ◆Duplex  
Wavelength ◆1310nm    ◆1550nm    ◆Others   
Transmission Distance ◆5KM    ◆20KM    ◆60KM    ◆80KM   ◆120KM