AVT MAGIC AE1 DAB Hardware & Software Manual page 41

– String Command: Reserved for future applications.
Example:
You want to connect the X.21 line with TTL 1. After the transmission has
been finished the connection is to be cleared with TTL 1.
Programming:
Positive egde:
Negative egde:
FIG. 15 SEQUENCE OF EVENTS FOR THE EXAMPLE
Switch
8 1
15 9
15-pol. SUB-D connector
to MAGIC AE1 DAB
(TTL/RELAY)
W i n d o w s
Function Code: Disconnect
Function Code: Connect
Switch is opened:
Pin 9 = TTL 1 is on +5 V (via internal 10 KOhm series resistance)
Switch is closed:
Pin 9 =TTL 1 is set to 0V (Pin 5):
Connection is established
Switch is opened:
Pin 9 =TTL 1 is set to +5V:
Line is disconnected
P C S o f t w a r e
PAG E 41