The 2120 CDT allows use of addressable devices to provide individual reporting. So, if an addressable smoke
detector senses smoke, its activation will result in a report that specifically identifies the location of that detector.
Look at Figure 3. You can see that all addressable devices are connected to the CDT panel via a twisted, shielded
wire pair called MAPNET II@.
PS = Addressable Pull Station
ASD = Addressable Smoke Detector
IAM = Interface Addressable Module
ZAM = Zone Addressable Module
Up to 128 Devices Per MAPNET II@
MAPNET II@Block Diagram
FIGURE 3
As Figure 3 shows, there are four basic types of addressable devices:
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Addressable smoke detectors (ASDs), requiring only the MAPNET II@wire pair for both data and power.
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Addressable pull stations (APSs), requiring only the MAPNET II@wire pair for both data and power.
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lnferface addressable modules (IAMs), requiring only the MAPNET II@wire pair for both data and power.
IAMs interface a single conventional device - such as a pull station or smoke detector - to a CDT.
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Zone addressable modules (ZAMs), requiring the MAPNET II@wire pair for data, a pair for power and a
pair to connect the external monitor or control device wiring. A monitor ZAM interfaces a zone of
conventional alarm-initiating devices to the CDT. A control ZAM interfaces a single controlled device to
the CDT. A signal ZAM interfaces a zone of indicating devices to the CDT (signal ZAMs may require a
fourth wire pair for audio or phone riser input).
Since addressable devices have unique locations, each device’s address must be proper/y set. The address for
each device on a MAPNET II@MUST be set when you install the device.
This technical reference provides installation instructions for the CDT panel. Instructions for setting panel and device
switch settings are provided in this document.
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