INTRODUCTION 
    Touchpoint Pro 
Pt. No. 2400M2566_1_EN  18  Operating Manual 
For single cabinet installations, the Ring Network runs directly between the RCM and the Control Module. 
For Remote units, the network runs additionally over data cable between the Controller and all of the backplanes in the 
system. 
The Ring Network is the only communication link required between the CCB and Remote Units (which have their own 
backplanes, PSU and modules, but no Control Module). 
 
 
 
 
 
 
 
 
 
 
Figure 23.  Ring Circuit With All Modules Working 
 
 
 
 
 
 
 
 
 
Figure 24.  Ring Circuit With a Failed Module 
 
Further information can be found in Ch.18 Ring Communication Errors.