I 
INSTALLATION 
I 
/Installation and removal 
of 
AIS 
modules 
I 
This section explains how to install and remove the 
AIS 
onto and from the base 
unit. Please note that when installing or removing a module, always ensure that the 
power supply is turned 
OFF. 
1. 
Installing a module onto the base unit 
Insert the module fixing  hooks on the bottom 
of 
the modules, into the  module 
fixing holes 
of 
the base unit. Then push the module onto the base unit making 
sure that the module fixing hooks are firmly inserted in the fixing  holes. After 
this, secure the module with the mounting screw at the top 
of 
the module. 
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