Sandia Aerospace ST 32 - Manual (Page 12)

3.5 O
PERATING
I
NSTRUCTIONS AND
L
IMITATIONS
Refer to the display unit(s) being interfaced for operation and limitations.
3.6 C ALIBRATION
No field calibration is required.
3.7 C ONTINUED A IRWORTHINESS
Maintenance of the ST 32 is on condition only. No scheduled maintenance is required.
Figure 3-3
Interconnect Diagram
9
3.4 E
LECTRICAL
The ST 32 operates on 18-32.2Vdc. Power to ST 32 should be protected by a 1.5 amp breaker or circuit protec-
tion can be shared with the display unit being interfaced (see installation manual of unit being interfaced). All
twisted pairs are #22 AWG.. Power and ground are single wires and should be #22 AWG or larger. Figure 2
shows the interconnect of the ST 32 to the Garmin system.
SANDIA aerospace
Albuquerque, New Mexico
www.sandia.aero
4
D
C
D
C
B
A
3 1
1 2 3 4
A
B
2
B
REV. DWG. NO. CAGE CODE SIZE
305952-XX-TS
SHEET 3 OF 3
3
SCALE: NONE
ACFT POWER
2 AMPS
s
s
s
s
DIGITAL IN 4A
77
67
2
3
4
5
6
7
9
10
8
11
12
13
14
1
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
ACFT PWR
GND
VFC_SIGNAL_OUT
GND
EXCITE_10V_P
BRIDGE_EXCITE_P
BRIDGE_SIGNAL_P
TACH-1-A
TACH-1-B
MONOPOLE-1-P
TACH-2-A
TACH-2-B
MONOPOLE-2-P
TACH-3-A
TACH-3-B
MONOPOLE-3-P
TACH-4-A
TACH-4-B
MONOPOLE-4-P
ACFT_PWR
VFC_EXCITE_OUT
#OPER
BRIDGE_EXCITE_N
BRIDGE_EXCITE_N
BRIDGE_SIGNAL_N
TACH-1-OUT
MONOPOLE-1-N
TACH-1-C
TACH-2-OUT
MONOPOLE-2-N
TACH-2-C
TACH-3-OUT
MONOPOLE-3-N
TACH-3-C
TACH-4-OUT
MONOPOLE-4-N
TACH-4-C
ST32
61 DISCRETE IN 2A
DIGITAL IN 1A
TORQUE
BRIDGE
14
11
10 VDC XDUCER PWR
XDUCER LOW
s
s
s
s
s s
s
s
74 DIGITAL IN 1A
75 DIGITAL IN 2A
76 DIGITAL IN 3A
GEA 71
A OUT A
B OUT B
C OUT C (ACFT GND)
TACH GENERATOR
(TYPICAL)
s
s
s
A OUT HI
B OUT LO
MONOPOLE
(TYPICAL)
s
NOTES:
1. ALL TWISTED PAIR WIRES #24 AWG OR BIGGER.
2. SHIELDS CONNECTED TO CONNECTOR GROUND BLOCK
3. TACH INPUTS CAN CONNECT TO EITHER A TACH GENERATOR OR MONOPOLE SENSOR
4. TYPICAL CONNECTIONS FOR TACH GENERATORS AND MONOPLE SENSORS ARE SHOWN.
ADDITIONAL SENSORS CAN BE CONNECTED SIMILARLY
5. IF TACH INPUT CONNECTED TO TACH GENERATOR MONOPOLE-X-N INPUT MUST BE GROUNDED
J1
EXCITE_10V_N