UPS Aviation Technologies Apollo SL70R, Installation Manual

Page: 21 / 52

Installation Procedures
Apollo SL70R Installation Manual
13
1
2
Power
Ground
C4
C2
C1
B4
B2
B1
A4
A2
A1
D4
15
34
16
32
14
33
12
31
13
35
30
Ground
Standby
Ident
Suppress
Ground
Ground
TxD1
RxD
C4
C2
C1
B4
B2
B1
A4
A2
A1
D4
Ground
SL70R
Transponder
10
29
19
37
5
4
3
Chassis Ground
Avionics
Power
+
-
2A Breaker
Altitude
Encoder or
Digitizer
Shielded Cable
Remote
Ident
(Optional)
To Antenna
Coax Cable
RS-232 Serial I/O (Note 5)
Note 2 (Optional)
Note 3 (Optional)
Notes:
2. Use standby input to select between two transponders using a selector switch.
Unit is in standby when input switched to ground.
3. Suppression input, typically connected to DME suppression output. Transponder is
suppressed when input is high.
4. Breaker (or switch) must be accessible by pilot. See Section 2.3.
5. The length of cable used for the serial connection between the SL70R and the host
should not exceed 20 feet.
RxD
Ground
Chassis Ground
Host System
1. Select the gray code input by grounding pin 36 to pin 28 when using the parallel gray code altitude input
For serial altitude, pin 36 is left open.
Suppress return
36
28
Gray Code Select
Ground
TxD
TxD2 22
See Note 1
(See Note 4)
Figure 2-5. Wiring Diagram - Gray Code Altitude Input