GTN 625/635/650 TSO Installation Manual
Page 5-13
190-01004-02
Rev. C
5.2.7.2
Main Indicator Electrical Characteristics
5.2.7.2.1 Deviation
Pin Name
Connector
Pin
I/O
MAIN LLEFT OUT
P1001
49
Out
MAIN LRIGHT OUT
P1001
68
Out
MAIN VEUP OUT
P1001
12
Out
MAIN VEDOWN OUT
P1001
31
Out
The deviation output is capable of driving up to three 1000 loads with 150 mVDC 15 mVDC for full-
scale deflection, 0 mVDC 4.5 mVDC when centered. The drive circuit provides for more than full-scale
deflection with a maximum course deviation output voltage of ±300 mVDC 30 mVDC.
5.2.7.2.2 TO/FROM
Pin Name
Connector
Pin
I/O
MAIN +TO OUT
P1001
11
Out
MAIN +FROM OUT
P1001
30
Out
The output is capable of driving up to three 200 loads. When indicating TO, MAIN +TO OUT is
+225 ±75 mV DC with respect to MAIN +FROM OUT. When indicating FROM, MAIN +TO OUT is -
225 ±75 mV DC with respect to MAIN +FROM OUT. When invalid information is present (Flag IN
VIEW) the TO/FROM output is 0 ±20 mV DC.
5.2.7.2.3 Flags
Pin Name
Connector
Pin
I/O
MAIN LFLAG OUT
P1001
50
Out
MAIN LATERAL -FLAG OUT
P1001
69
Out
MAIN VEFLAG OUT
P1001
51
Out
MAIN VERTICAL -FLAG OUT
P1001
70
Out
The Flag outputs are capable of driving up to three 1000 loads. When valid information is present (Flag
OUT OF VIEW) the Flag output is 375 ±80 mV DC. When invalid information is present (Flag IN
VIEW) the Flag output is 0 ±25 mVDC.
5.2.7.2.4 Superflags
Pin Name
Connector
Pin
I/O
MAIN LATERAL SUPERFLAG OUT
P1001
13
Out
MAIN VERTICAL SUPERFLAG OUT
P1001
32
Out
The output supplies not less than 320 mA with the output voltage not less than (AIRCRAFT POWER –
2.0 VDC) when the flag is to be OUT OF VIEW. The output is electrically open when the flag is to be
IN VIEW.
5.2.8
OBS
Pin Name
Connector
Pin
I/O
MAIN OBS ROTOR C
P1001
2
Out
MAIN OBS ROTOR H (GND)
P1001
1
--
MAIN OBS STATOR D
P1001
21
In
MAIN OBS STATOR E (GND)
P1001
40
--
MAIN OBS STATOR F
P1001
41
In
MAIN OBS STATOR G (GND)
P1001
60
--
MAIN OBS ROTOR C and H (GND) are a buffered output that is intended to drive the OBS rotors.
MAIN OBS STATOR D and MAIN OBS STATOR F are each phase and amplitude shifted version of the
MAIN ROTOR C output. Each pair is intended to read one of the two windings of the indicator‘s OBS
stator.