Harris Platinum HT EL 2000LS, Техническое руководство

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4.4.4.4
Air Fault
The air flow is monitored by an air flow sensor 1A14A3U1
mounted in the back of the cabinet. If the flow at the sensor
drops below 100 feet per minute the AIR FAULT indicator is
turned on.
4.5
AC BREAKERS
4.5.1
MAIN BREAKER
There are three ac circuit breakers that provide line feed pro-
tection to the transmitter. Breaker 1A1CB1 is a 20A main
breaker for the transmitter. Opening 1A1CB1 removes power
from the transmitter.
4.5.2
AC CONTROL BREAKER
This 5A breaker 1A1CB2 supplies power to the exciter. Open-
ing 1A1CB2 removes power from the exciter 1A2.
4.5.3
LOGIC SUPPLY BREAKER
This 2A breaker 1A1CB3 supplies power to the logic supply
1A11A3. Opening 1A1CB3 removes power from the Logic
supply 1A7A3.
4.6
POWER MODULE 1A11
The Power Module 1A11 contains the 50 volt supplies
PS2/PS3, Fault Display and Interface A6, filter cap’s C1, R1,
relays K1 and K2, A3 Logic supply, CB1 5A fan dc breaker,
and CB2 1A 50v sample breaker.
4.6.1
POWER SUPPLY FAULT DISPLAY and IN-
TERFACE 1A11A6
The Fault Display and Interface provides local fault indication
of each 50 volt power supply and provides a summary fault
signal to the interface logic assembly 1A7. Additionally the 5V
P/S fault signal is conditioned to interface to the 12V logic input
of the interface logic.
U15 INPUT FUNCTION
PINS NAME FUNCTION
1 CLK CLOCK REGISTER
2 TX_ON XMTR IN AUTO ON MOTE
3 MOD_RESET RESET THE RF MODULES
4 MOD1F MODULE FAULT IF HI
5 MOD2F MODULE FAULT IF HI
6 MOD3F MODULE FAULT IF HI
7 AIR_FLOW AIR OK IF HI
8 50V_OK 50V SUPPLY IS GOOD
9 VIS_F/B_ACT REDUCED VISUAL & AURAL OUTPUT POWER
10 AUR_F/B_ACT REDUCED AURAL OUTPUT POWER
11 DC_OK 50 VOLT SUPPLY FAULT
U15 OUTPUTS
14 DELAY ENABLE POWER REDUCTION
15 !REDUCE DRIVE ON REDUCTION
PIN IS LOW WHEN:
A) MOD_RESET & MOD_FAULT ARE LOW
B) DELAY IS LOW
C) 50V_FAULT IS LOW
16 !AIR FAULT AIR FLOW IS LOW & TX_ON
17 !MOD_FAULT 5OV IS OK AND ANY MOD_F IS HIGH
18 !50_FAULT INDICATES 50V SUPPLY FAULT
19 MOD_5E ENABLES MODULE SLOT 5
NOTE: All MOD_1E through MOD_5E work the same way using the MOD_nF line from the module to reset it.
Pin 19 is high when: A) If 50V_OK is high, B) If DELAY is low, and C) If MOD_nF is high and MOD_RESET is low.
(“n” is the module slot number.)
Table 4-4. U15 Input & Output Functions
Platinum™ Series
4-6 888-2457-001 Rev. B: 7/15/02
WARNING: Disconnect primary power prior to servicing.