10 N2 Dialer Module—N2 Dialer Module (NDM)
N 2 Bus
n dm re m
..
VAV
Rem ote N2 D ialer
Local M od em
R em o te M odem
Local N 2 D ialer
Lo cal S ite
Rem ote S ite
F acility M anage m en t Sy ste m (F M S )
T he FM S h eadend
m ay be a PC or
a p anel/controller,
d ep en d in g on the
FM S pr od u ct.
Note:
D X
A H U
U NT
D X
A H U
UN T
Figure 2: Typical N2 Communication Dial-Up Application
A passive printer application is comprised of a remote NDM (firmware D01 or later),
remote devices, and printers used for alarm notification (Figure 3). The passive printer
application does not have a local NDM connected to an FMS headend. Instead, the
remote NDM dials only passive printers to report alarms (changes of state) and
offline/online transitions. To set up a passive printer application, all primary and
secondary phone numbers in a remote NDM configuration must be defined as passive
devices (printers).
In a passive printer application, reported alarms and offline/online transitions must be
cleared using a Configuration Tool (e.g., HVAC PRO for Windows
6.0). The NDM
will not dial in to report subsequent alarms and offline/online transitions for a device until
the original alarm is cleared.
When the remote NDM comes online (e.g., after reset or power up), it dials the passive
printer to report its online status and the online status of connected N2 devices. If a
remote device has an alarm, the NDM will immediately dial in again to report the alarm
condition. At this point, a Configuration Tool must be used to clear the alarm to allow
additional reports to be sent.
#
Passive Printer
Application
Summary of Contents for N2
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