Enter the type of alarm function you wish to use Exclusive (Alarm switch is closed when the reported sensor value is outside of the low and high values selected.) or Inclusive (Alarm switch is closed when the reported sensor value is between the low and high values selected.).
Enter Output: A1 [1] or A2 [2]. Enter low threshold.
Enter high threshold.
Enter on delay in seconds
Enter off delay in seconds
After entering this information the Setup menu reappears and to add additional alarms the process must be repeated.
Part B: Interfacing to the Alarm Circuit
An intermediate relay is recommended as the alarm interface to the device being controlled by the alarm. The intermediate relay provides isolation from any voltage or current spikes that might be associated with the device being controlled, e.g. a pump motor starting. Further, it is possible to use a programmable time relay in order to insure that the alarm does not go into a dithering state. A typical implementation is shown in Figure 11.
ALARMS
There are six user programmable alarms on the |
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They can be assigned to either of two alarm switches. |
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(ALARM 1 and ALARM 2) which provide a switched |
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connection to ground. Electrical connection is made to the |
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terminal strip at the positions labeled ALARM 1 and ALARM |
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2. The maximum current sinking capability of these switches |
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is 2amps. | Figure 14 Alarm Setup |
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SETTING UP THE ALARMS
Part A: Selecting the Sensor to be alarmed and the Alarm Thresholds and the On and Off Delays for each Alarm
Press ENTER to get to the MAIN MENU.
From the MAIN MENU press number 1. STATION SETUP From the STATION SETUP menu press number 7. ENTER ALARM THRESHOLDS.
Select ADD, DELETE or QUIT. If you select Add, the next menu will display the list of sensors that are currently activated.
To add an alarm, enter the sensor number.
12 |
Interfacing the WMS-16 with a Telephone Modem
The
The serial cable from the
