9
Interface to SPC Panel/System
54
Vanderbilt
Seismic Detectors Application Guide
I-200153-1
08.2016
Figure 9-2: SPC seismic electrical connections
9.2
Testing the detectors
Relay 3 is a normally open configurable output, located in the main panel. This relay is a dry
change over contact relay. Relay 3 can be configured as the seismic test output. The attributes as-
signed to relay 3 can be copied to one of the two available relays in each expander.
The system outputs are volt free change over contacts rated at 30v DC and SPC panel
outputs 1,2,4,5, and 6 open collector rated at 45mA.
When the output is assigned as a seismic output there are a number of different ways that the out-
put can be used to test the seismic detectors:
Manual test
Automatic test
Automatic test when setting
9.2.1
Manual Test
This is instigated by the user of the system and is a menu driven option.
Once the test has been selected, then the assigned outputs in the panel and the expanders will
activate the associated GMXS1 and GMXS5 test transmitters. The options for this are from 3 -120
seconds, with the default being 30 seconds.
The SPC system can accommodate up to 512 zones. Test duration should be extended in
accordance with the number of seismic zones in the test.
Once completed all test results, pass/fail, will be posted to the system log and a failure of a seismic
detector to activate will be displayed on the keypad as a failure. This does not determine the exact
detector(s), which failed the test but a general notification. For the exact test failure(s), refer to the
system log.
The seismic input attribute must be enabled through the SPC system for this test.
9.2.2
Automatic Test
The SPC panel has the facility to determine the frequency of the seismic test in the Output Configu-
ration screen. The options for this are from 12
– 240 hours, with the default being 168 hours = 1
week.
The SPC panel has the facility to determine the duration of the seismic test in the System Timers
screen. The options for this are from 3 -120 seconds, with the default being 30 seconds.
The SPC system can accommodate up to 512 zones. Test duration should be extended in
accordance with the number of seismic zones in the test.
The time required for the actual test for 50 detectors would be 1-2 seconds and the lower time lim-
its should be used in preference to the upper limits. The automatic seismic test is not dependent
upon the set condition of the system but operates differently for either option.
