Honeywell Touchpoint Pro Technical Handbook page 25

INTRODUCTION
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.19 Ring Communication Errors.
Part. No. 2400M2501_6 Touchpoint Pro
18 Technical Handbook