User manual
GTR64  http://www.matrix.es/GTR64 
C) Expansion port - RS232 2-way Serial Cable 
Modem and System Breakout Cable 
1m lead length with: 
• HD15 male connector 
Connected to; 
• DB9 female connector (9 signal RS 32 serial connection) 
• 7 flying leads 
Conductor current rating < 1.5A DC, 26 AWG 
HD15 male    DB9 female  Flying leads   
2
1 
2 
SCL 
RD3 
3  TD
IO
4 
5 
6 
7 
8  ALA
9 
10 
VREF 
RI1/IO8 
9 
11 
12 
13 
14 
15 
GND 
ADC 1 
5 
3 
 1 
IO 3 
SDA 
VRTC 
RM 
IO 2 
IO 4 
SERVICE 
1 
2 
3 
6 
7 
8 
4 
Black 
Brown 
Red 
Orange 
Yellow 
Green 
Blue 
Interconnect Table 
GTR64 Integrators Manual V.1.2  Pag. 32 
Preliminary. Subject to change without prior notice 










