Yes, the GE Interlogix Simon XTi can support up to three image sensors as long as they meet the criteria below:

LP Image Sensor models 

LP Image Sensor models include: ADC-IS-100-LP, ADC-IS-200-LP, ADC-IS-221 LP, and ADC-IS-300-LP. 

  • The ADC-IS-100-LP has a silver label. 
  • The ADC-IS-200-LP and  ADC-IS-221 LP have an orange label. 

Note: Image Sensor models ADC-IS-200-IQ and ADC-IS-221-IQ have the same compatibility as the ADC-IS-200-LP and  ADC-IS-221 LP. 

  • Simon XTi Panel version of 1.0+.
  • modules between versions:
    • 151 - 185 require an Image Sensor daughter board is attached for compatibility.
    • 187+ is compatible and does not require an Image Sensor daughter board to be attached.

GE Interlogix Simon XTi - Frequently Asked Question's