Chapter 9 : general i/o – Horner APG XLt OCS User Manual
Page 33
MAN0878-04-EN CH. 9
August 12, 2009
Page 33 of 100
ECN # 979
CHAPTER 9: GENERAL I/O
Note: Each XLe/XLt unit is sent with a datasheet in the box. The datasheet is the first document
you need to refer to for model-specific information related to XLe/XLt models such as pin-
outs, jumper settings, and other key installation information. The web version of this manual
has all of the XLe/XLt datasheets attached to it. Visit our website (see page 96) to obtain
datasheets, user documentation, and updates.
9.1 Overview
The XLe/XLt is a compact unit that contains high density, very versatile I/O. Using the I/O properly
requires wiring to the proper terminals, configuring jumpers inside the XLe/XLt unit and configuring
Cscape properly. This section will offer some tips and suggestions to configure the I/O properly. For the
register mapping of the I/O, refer to CHAPTER 13.
9.2
Removing the XLe/XLt Back Cover
Some I/O configurations require jumper settings to be changed inside the XLe/XLt unit. Examples of
these settings are setting positive or negative logic on digital inputs or setting current or voltage on analog
inputs.
Each XLe/XLt I/O jumper is set to a factory default. Refer to the data sheet for your XLe/XLt model to find
the default setting to determine if a jumper change is necessary for your application.
To remove the back cover of the XLe/XLt, remove the four (4) Phillips screws from the back of the unit. It
may help to place the XLe/XLt unit face down on a clean work surface. Once the four screws are
removed the back cover can be lifted straight off.
Figure 9-1 – Removing the Back Cover
Warning: Power, including I/O power must be removed from the unit prior to removing the
back cover. Failure to do so could result in electrocution and/or damage to equipment.