The CDT - just like any other 2120 transponder - mounts in a 2-, 4,
or 6-unit backbox (see Figure 2). Each
CDT has a transponder number that you use to identify its location in the 2120 system and in the building itself.
Each CDT also has monitor and control points, which are wired differently from other transponder monitor and
ccn!
trol points.
A Communicating Device Transponder
FIGURE 2
The 2120 CDT allows use of addressable devices to provide individual device reporting. So, if an addressable
smoke detector senses smoke, its activation wiil resu!t in a report that specifically identifies the location of that
smoke detecto:.
Look at Figure 3. You can see that all addressable devices are connected to the CDT panel via a twisted, shielded
wire pair called the local loop or MAPMET’“.
ASD = Addressable Smoke Detector
IAM = interface Adaptor Module
ZAM = Zone Adaptor Module
Up
to 128 Devices per MAPNET-”
NOTE: The ASD is an IAM mounted in a detector base.
MAPNET’” Block Diagram
FIGURE 3
3
To Next Page
Loading...
