Introduction 
3/07  UDC3500 Universal Digital Controller Product Manual  9 
Infrared communications 
The infrared connection provides a non-intrusive wireless connection with the instrument 
and maintains NEMA4X AND IP66 integrity.  
No need to get access to the back of the controller to communicate with the instrument, 
no need to take your screw driver to wire the communication cable, no wiring mistake 
possible. You can now duplicate an instrument’s configuration, upload or download a 
new configuration in a matter of seconds, just by pointing your Pocket PC in the direction 
of the instrument.  
It takes just a few seconds to upload a configuration from an instrument. You can then 
save the configuration file onto your PC or pocket PC for review, modification or 
archiving. Furthermore, this software also gives you important maintenance information 
on the controller: instantly, get information on the current operating parameters, digital 
inputs and alarm status, identify internal or analog input problems. 
Question: What if I have several controllers on the same panel? How can I be sure I am 
communicating with the correct one? 
Answer: The infrared port of the controller is normally “off”. You activate the infrared 
port by pressing any controller’s key. You can now communicate. After 4 minutes, the 
port will be shut down again. Each controller may also be assigned a different 
communications address.  
 
 
Figure 1-3 Depiction of infrared communications