Installing The Unit - Equinox Systems ESP-2 Product Installation Manual

on the columns corresponding to the desired interface setting. The interface settings are
screened on the PCB.
5. If you are enabling the RS-422 or the RS-485HD interface on a port, you may also
enable/disable 100 ohm termination of the differential receive signal pair on that port.
This termination is enabled by placing a jumper on the 2 pins adjacent to the ganged
jumper for the port; see the location noted in Figure 2. Termination is disabled by factory
default, that is, the jumper only covers one of the two pins for each port.
This termination is typically used in RS-485 environments when the device is the fi rst or
last on a multi-drop line for a 2-wire confi guration.
This termination should always be set when the unit is set for RS-422, as this is point-to-
point confi guration.
If your confi guration includes supplying your own external termination, the termination
on the ESP-2 MI should not be used.
5. When the RS-485HD interface is enabled in hardware, you will be able to select the
transmitter/receiver mode during startup. For more information on these software-
confi gurable options, see Interfaces on page 2.
6. Replace the cover on the unit and reinstall the four screws.

Installing the Unit

The ESP-2 MI can be installed on a table, on a DIN rail or on a wall.
WARNING: The power outlet should be installed near the equipment and should be
easily accessible.
The ESP-2 MI supports hot swapping, that is, you may replace an existing ESP-2 MI with a
similarly configured unit without affecting the server or having to reconfigure the ports.
Installing on a Table
The unit ships ready to use in a tabletop environment. This includes four rubber feet on the
bottom of the unit.
At a later time, if you want to move the unit to a DIN rail or a wall installation, you can
remove the rubber feet. Grasp the bottom of each foot and gently pull it down and out of the
hole.
Installing on a DIN Rail
Equinox offers an Industrial Mounting Kit, part number 790226, containing hardware and
instructions for mounting an ESP-2 MI on a DIN rail.
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Equinox ESP-2 MI Serial Hub Product Installation Guide