User's Manual
Table Of Contents
- Customer Response Form
- Record of Revisions
- Service Bulletin List
- List of Effective Pages
- Introduction
- System Description
- System Operation
- 1. Registering and Activating Terminals
- 2. Using the A781-200 System
- 3. Channel Status and System Configuration
- 4. Maintenance Mode
- Installation
- Test and Fault Isolation
- Maintenance and Repair
- Appendix A: Return Material Authorization
Table 3-2 SDU Front Connector DSUB and RJ45 Pin Assignment
9S DSUB Pin
Number
Description RJ45 Pin Number Description
1 NC 1 RX+
2 TX 2 RX-
3 RX 3 TX+
4 NC 4 NC
5 GND 5 NC
6 NC 6 TX-
7 NC 7 NC
8 NC 8 NC
9 NC
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-200 SDU and SCM
23-15-30 3-7
DATE TBD
B. SCM
The SCM uses a 15 pin D-type male connector
and locking screws. Pin assignments are
compliant with ARINC Characteristic 781 and shown in Table 3-3.
Table 3-3 SCM D-Type Connector Pin Assignment
Pin Number Description
1 Data to SDU A (RS422)
2 Data to SDU B (RS422)
3 Data from SDU A (RS422)
4 Data from SDU B (RS422)
5 Reserved - RS232 Gnd (used for shop loading)
6 Spare
7 Chassis Ground
8 Power Input +8 V to +15 V
9 Reserved - Enable RS232 (used for shop loading)
10 Reserved - 0 V strap output (used for shop loading)
11 Spare
12 Reserved - RS232 Tx (used for shop loading)
13 Reserved - RS232 Rx (used for shop loading)
14 Spare