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Introduction 

The RocketLinx ES8105/ES8105F series of industrial Ethernet switches provide three 
models:



ES8105

 supports five 10/100BASE-TX ports



ES8105F-Multi-Mode: 

supports four 10/100BASE-TX ports and one 

         100BASE-FX Ethernet port



ES8105F-Single-Mode:

 supports four 10/100BASE-TX ports and one 

         100BASE-FX Ethernet port

The RocketLinx ES8105 series provides a slim industrial design to save rail space for 
compact system requirements. The ES8105 series is enclosed in an industrial-grade 
aluminum case with IP30 standard protection. It provides one relay output to alarm 
port link failure events, which is enabled and disabled by a DIP switch.

Refer to the Comtrol web site for specification information. For more detailed 
installation information, see the 

RocketLinx ES8105/ES8105F User Guide

, which is 

available at: ftp://ftp.comtrol.com/html/ES8108_docs.htm.

Wiring the Power Inputs

       

1. Insert the positive and negative wires into the power V+ and V- contacts on the 

           terminal block connector. 
       2. Tighten the wire-clamp screws to prevent the wires from being loosened.

Note: The recommended working voltage is 24VDC (18- 32VDC) 
          or 18VAC (18-27VAC).

Wiring the Relay Output 

The relay output alarm contacts are on the terminal block 
connector as shown in the figure.

If you insert the wires and enable the DIP switch for the port, 
the relay output alarm will detect any port failures, and form 
a short circuit. The alarm relay output is Normal Open.

Enabling the Event Alarm

Use this table to set the DIP switch for the relay output alarm.

1

2

3

rt, 

m.

This is a Class 1 Laser/LED product.  

Do not stare into the Laser/LED Beam.

ATTENTION

RX

TX

RX

TX

Cable Wiring(SC to SC)

RX  A                             TX B 

TX  A                             RX B

A

B

Pin 

Status 

Description 

1-5 

On 

Enables the port link failure alarm on this port. 

Off 

Disables the port link failure alarm on this port. 

4

NO

123

5

Grounding the ES8105/ES8105F

There is one grounding screw on the bottom side of the ES8105/ES8105F. Loosen the 
screw and connect a ground wire from the ES8105/ES8510F to a grounded surface to 
ensure safety and prevent noise.

Mounting the Unit 

You can mount the ES8105 series on a DIN rail. 

Connecting the Ethernet Port 

Connect one end of an Ethernet cable into the Ethernet port of the ES8105/ES8105F 
and the other end to the attached networking device. The Fast Ethernet ports support 
10BASE-T and 100BASE-TX, full- or half-duplex modes.

The Fast Ethernet ports automatically detect the signal from the connected devices to 
negotiate the link speed and duplex mode. Auto MDI/MDIX allows you to connect 
another switch, hub, or workstation without changing straight-through or crossover 
cables. Crossover cables cross-connect the transmit lines at each end to the received 
lines at the opposite end.

The Ethernet cables use Pins 1, 2, 3, and 6 of an 8-pin RJ45 connector. The signals of 
these pins are converted by the automatic MDIX function, as shown in the following 
table:

3 TD+

6 TD-

3 RD+

6 RD-

Switch

Router or PC

1 RD+

2 RD-

1 TD+

2 TD-

Straight-Through Cabling Schematic

3 TD+

6 TD-

3 TD+

6 TD-

Switch

Switch

1 RD+

2 RD-

1 RD+

2 RD-

Crossover Cabling Schematic

Pin 

MDIX Signals 

MDI Signals 

1 RD+ 

TD+ 

2 RD- 

TD- 

3 TD+ 

RD+ 

6 TD- 

RD- 

 

The LINK/ACT LED is lit when the cable is correctly connected. The LINK/ACT LED is 
lit yellow for a 10BASE-TX Ethernet connection or green for a 100BASE-TX Ethernet 
connection. Always make sure that the cables between the switches and attached 
devices (for example, switch, hub, or workstation) are less than 100 meters (328 feet).

Connecting the Fiber Port (ES8105F)

Connect the fiber port on the ES8105F to another fiber Ethernet device using the 
following information.

A wrong connection will cause the fiber port not to work properly.

The fiber connector is a standard connector or square connector (SC).

Note: In the IEEE standard, it suggests the available transmission distance is 2KM for 
          62.5/125um fiber optical cable in 1310nm wave length. Actually, the attenuation
         of Multi-Mode 62.5/125um optical fiber cable is 1.5dBm/km and the maximum link 
         distance can be up to 4 to 5km.

 

Mode  Cable Type  Wavelength 

Transmit 

Power 

(min.) 

Transmit 

Power 

(max.) 

Receive 

Sensitivity 

(max.) 

Receive 

Sensitivity 

(min.) 

Min. Launch 

Power –Max. 

Receive 

Sensitivity

 

Distance(km) 

Multi 

50/125um 

62.5/125um 

1310nm -20dBm 

-14dBm 

-31dBm  0dBm 

11dBm 

2km 

Note (below) 

Single 8-10/125um 

1310nm 

-15dBm 

-8dBm 

-34dBm 

-8dBm 

19dBm 

30km 

 

Summary of Contents for ES8105 Series

Page 1: ...25um 850nm 1310nm 3 5dBm 1 5dBm 3 0dBm 0 7dBm 0 75dBm 0 1dBm Single Mode 9 125um 1310nm 0 4dBm 0 35dBm 0 75dBm 0 1dBm Single Mode 9 125um 1550nm 0 3dBm 0 22dBm 0 75dBm 0 1dBm 1 These values are per TIA EIA and other industrial specifications 2 These values are an example of the performance that can be obtained with a new fiber installation Standard Data Rate Mbps Cable Type IEEE Standard Distance ...

Page 2: ...ting the Unit You can mount the ES8105 series on a DIN rail Connecting the Ethernet Port Connect one end of an Ethernet cable into the Ethernet port of the ES8105 ES8105F and the other end to the attached networking device The Fast Ethernet ports support 10BASE T and 100BASE TX full or half duplex modes The Fast Ethernet ports automatically detect the signal from the connected devices to negotiate...

Page 3: ...ting the Unit You can mount the ES8105 series on a DIN rail Connecting the Ethernet Port Connect one end of an Ethernet cable into the Ethernet port of the ES8105 ES8105F and the other end to the attached networking device The Fast Ethernet ports support 10BASE T and 100BASE TX full or half duplex modes The Fast Ethernet ports automatically detect the signal from the connected devices to negotiate...

Page 4: ...ting the Unit You can mount the ES8105 series on a DIN rail Connecting the Ethernet Port Connect one end of an Ethernet cable into the Ethernet port of the ES8105 ES8105F and the other end to the attached networking device The Fast Ethernet ports support 10BASE T and 100BASE TX full or half duplex modes The Fast Ethernet ports automatically detect the signal from the connected devices to negotiate...

Page 5: ...25um 850nm 1310nm 3 5dBm 1 5dBm 3 0dBm 0 7dBm 0 75dBm 0 1dBm Single Mode 9 125um 1310nm 0 4dBm 0 35dBm 0 75dBm 0 1dBm Single Mode 9 125um 1550nm 0 3dBm 0 22dBm 0 75dBm 0 1dBm 1 These values are per TIA EIA and other industrial specifications 2 These values are an example of the performance that can be obtained with a new fiber installation Standard Data Rate Mbps Cable Type IEEE Standard Distance ...

Page 6: ...25um 850nm 1310nm 3 5dBm 1 5dBm 3 0dBm 0 7dBm 0 75dBm 0 1dBm Single Mode 9 125um 1310nm 0 4dBm 0 35dBm 0 75dBm 0 1dBm Single Mode 9 125um 1550nm 0 3dBm 0 22dBm 0 75dBm 0 1dBm 1 These values are per TIA EIA and other industrial specifications 2 These values are an example of the performance that can be obtained with a new fiber installation Standard Data Rate Mbps Cable Type IEEE Standard Distance ...

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