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Auto-dial
Feature
Output Types
0 - 10 VDC
DAT - Duration
Adjust Type
10
Technical Bulletin—TC-9102
When the controller is connected to a remote N2 Bus and supervised by a
Metasys N2 Dialer (NU-NDM101-0) which is linked to a Metasys
network by a telephone line, the following alarm conditions in the
controller will initiate the automatic dial feature:
• Window Open
• Low Limit mode
• High or low alarm limit violation of the room temperature when alarm
limits have been set by the supervisory system.
When any one of these alarm conditions occurs, the N2 Dialer will detect
the alarm and connect the remote N2 Bus to the Metasys network. When
the telephone line connection is established the controller alarm status
will automatically be reset and the controller is then ready to report
further alarm conditions as they occur. Refer to the Technical Bulletin of
the NU-NDM101-0 for further information.
The heating and cooling outputs are one of the following types,
depending on the controller model code:
The output is an analog voltage between 0 and 10 VDC in direct
proportion to the controller output from 0 to 100%.
The DAT output is a triac which is switched on for a duration within the
set heating or cooling valve cycle time in direct proportion to the
controller output from 0 to 100%. To avoid unnecessary switching of the
valve actuator when the output is between 0 and 5% the triac remains off,
and when the output is between 95 and 100% the triac remains on. The
default cycle time is 300 seconds.
50% O utput
O N
O FF
D A T C ycle T im e
30% O utput
Figure 7: DAT Output
D A T Cyc le Tim e
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