DuraComm PSDA-MU1, Руководство пользователя

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DuraComm Annunciator Internal Operation Basics
The Full Test Point Voltage for the DuraComm Annunciator is reduced by the internal current limiter for
each circuit (10ma for each channel CH1 to CH6). The voltage drop is minimal for a normal state, trouble
alarm, open circuit fault, or test point short to GND1. If the test point positive wire is shorted to GND1,
the current limiter drops all the Vs voltage across itself, and limits the current to 10ma to protect Vs.
For CH1 to CH6 the internal Vs is 12VDC, and the Test Point Positive voltage is approximately 11.5 VDC
for normal operation, and the measured test point voltage is approximately 5.7 VDC.
Vs is 5 VDC for CH7 (Antenna). CH7 uses approximately 50 Ohms for R1 and EOL, so that it can detect
faults and trouble through the 50 Ohm Coax to the antenna, using two bias tees and a 50 Ohm load. See
Figure x for circuit. The internal 5 VDC current limiter is 100ma. This channel can be used to monitor a
relay, but it still requires the 50 Ohm EOL.
The 12 VDC and 5 VDC supplies are isolated from each other and from earth ground. A single short to
earth ground doesn’t cause any faults because it will not interfere with any trouble alarms.
The Audible alarm automatically sounds at the same rate as the flashing RED or Blue LEDs (about once
per /-). The audible alarm is automatically cancelled when no alarms or faults are active. The
Audible alarm can be manually muted or unmuted by a button located inside the annunciator door for
security. The audible alarm cannot be “muted” unless there is an active alarm or fault.
A self-test button is also located inside the door of the annunciator. An inspector should be prepared to
note that channels 1 thru 7 should cycle BLUE flashing, to GREEN solid, to RED flashing, then back to the
current system status. When the button is pressed, the outside managed wires are temporarily
disconnected, and internal hardware simulates a short to internal common to simulate a Fault (BLUE
LEDs), , a normal EOL condition (GREEN LEDs), and an alarm (short across managed lines – RED lights).
The front panel lights will cycle thru the colors for these conditions, and the FormC relays that connect
to the Fire Alarm Panel will cycle thru the proper states. (NOTE: This will generate alarms at the Fire
Alarm Panel. – Notify the responsible monitoring parties before preforming a test.) The RED lights for
alarms and the BLUE lights for faults will flash approximately once per second when they are active. The
green lights (Normal) do not flash. The self test Once the self-test completes it will re-connect to the
managed wires and show the current status of the wires.
DuraComm Annunciator Remote Monitoring Features
Monitor test point voltages and alarm levels for managed connections with bar graph display.
Monitor internal annunciator back-up battery voltage. Set alarm level and notifications.
Set user access
View alarm, fault, and normal status for all managed connections to BDA equipment.
Configure device and network settings