RocketLinx ES8105 Series Installation Overview

Use the following overview to install the ES8105 series. All models are referred to as the ES8105 unless a procedure is specific to a specific model.


See the ES8105-GigE page if you are installing a ES8105-GigE.

Wire the Power

The ES8105 series provides reverse polarity protection and accepts a positive or negative power source. The recommended working voltage is 24VDC (18-32VDC) and a maximum power consumption of 4W.


Remember to unplug the power terminal block before making the wire connections, otherwise the screwdriver can inadvertently short the terminal connections to the grounded enclosure.

  1. Insert the wires (12-24 AWG) from the power supply into the terminal block connector contacts.

    Power/Relay Connector

  2. Tighten the wire-clamp screws to prevent the wires from becoming loose.

Wire the Relay Alarm Output

The ES8105 has a built-in alarm-relay for port link and power events notifications. The relay contacts are normally open and remain open when there is no failure event. The relay contacts will close when there is a failure event to notify.

The failure events are selectable and enabled using the DIP switch on the ES8105. The relay contacts are rated for a maximum of 1A at 24VDC. Relay

Connect the Ground

Connect a ground wire between the chassis and earth ground using 12 to 24AWG wire to ensure that the ES8105 is not damaged by noise or electrical shock.

If you are going to mount the ES8105 on a grounded DIN rail, you do not need to also connect the ground wire.

Set the DIP Switch

DIP Switch

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

DIP SwitchStatusDescription
1 through 5



Enables the port link down alarm for the corresponding port.

Disables the power link down alarm for the corresponding port.

Mount the ES8105

Use these steps to mount the ES8105.

  1. Insert the upper end of DIN rail clip into the back of DIN rail track from its upper side.

  2. Lightly push the bottom of DIN rail clip into the track.

  3. Verify that the DIN rail clip is tightly attached on the track. Mounting

To remove the ES8105 from the track, reverse the steps above.

Connect RJ45 Ports

Connect standard Ethernet cables between the ES8105 Ethernet ports and the network nodes.

The Fast Ethernet ports support 10BASE-T and 100BASE-TX, full- or half-duplex modes. All of 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.


Always make sure that the cables between the switch and attached devices (for example, switch, hub, or workstation) do not exceed 100 meters (328 feet).

  • 10BASE-T: Category 3, 4, or 5 cable

  • 100BASE-TX: Category 5 cable

Connect the Fiber Port

If you are installing a ES8105F or ES8105F-XT, connect the fiber port.

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


This is a Class 1 laser/LED device. Do not stare into the laser/LED beam.

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



You can refer to this table for LED information.

PWR 1Device powered onNot applicableNo power
Alm (Alarm)Port link down or power failure event occurredNot applicableRelay not activated or not fault condition has occurred

Port 1-5 (ES8105/ES8105-XT)

Port 1-4 (ES8105F/ES8105F-XT)

Green: Link, a network device is detected and linked

Yellow: Speed, a network device is detected and link established at 100Mbps

Green: Activity, the port is transmitting or receiving packets from the connected device

Yellow: Speed, a network device is detected and link established at 10Mbps

Fiber Port 5


Green: Link 100Mbps, the port is operating in full-duplex mode

Green: Activity 100Mbps, the port is transmitting or receiving packets from the connected device

Port link down or port not connected

nice color