3: Installation: EDS4100 
EDS Device Servers User Guide  23 
 
Ethernet Port 
The back panel of the EDS4100 provides an RJ45 Ethernet port. This port can connect to 
an Ethernet (10 Mbps) or Fast Ethernet (100 Mbps) network. The Speed LED on the 
back of the EDS4100 shows the connection of the attached Ethernet network. The 
EDS4100 can be configured to operate at a fixed Ethernet speed and duplex mode (half- 
or full-duplex) or auto-negotiate the connection to the Ethernet network. 
Terminal Block Connector 
The back of the EDS4100 has a terminal block screw connector for attaching to an 
appropriate power source, such as those used in automation and manufacturing 
industries. The terminal block connector supports a power range from 42 VDC to  
56 VDC. It can be used with the EDS4100’s barrel power connector and PoE capabilities 
as a redundant power source to the unit. 
Figure 3-5. Terminal Block Connector Pin Assignments 
Pin  Signal 
Top V+ 
Middle V- 
Bottom Ground 
LEDs 
Light-emitting diodes (LEDs) on the front and back panels show status information. 
  Back panel. Each serial port has a Transmit and a Receive LED. The Ethernet 
connector has Speed and Activity LEDs. In addition, the back panel has a Power 
LED and a Status LED. 
   Front panel. The front panel has a green Power LED. 
The table below describes the LEDs on the back of the EDS4100.
 
Figure 3-6 .Back Panel LEDs 
LED  Description 
Transmit (green)  Blinking = EDS is transmitting data on the serial port. 
Receive (yellow)  Blinking = EDS is receiving data on the serial port. 
Power (green)  On = EDS is receiving power. 
Status (yellow)  Fast blink = initial startup (loading OS). 
Slow blink (once per second) = operating system startup. 
On = unit has finished booting. 
On = EDS is connected to a 100 Mbps Fast Ethernet network. Speed (yellow) 
Off = EDS is connected to a 10 Mbps Ethernet network. 
Activity (green)  Blink = EDS is sending data to or receiving data from the Ethernet 
network.