4.3.1
Parallel Interface and 20mA Interface on Connector X1
Parallel Key Code
Strobe Signal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Connector
6FM1790-8CA00
15-pin, female
Solder Side
Screw interlock
o
o
o
o
o
o
o
1
o
o
o
o
o
o
o
o
9
TTY Transmit Line (+TxD)
TTY Transmit Line (- TxD)
TTY Receive Line (+RxD)
TTY Receive Line (- RxD)
Parallel Key Code
Unassigned
Ground
2
0
2
1
2
2
2
3
2
4
2
5
2
6
a a a a
a a a a
a a a a
a a a a
2
7
Active or passive setting of the 20mA interface is carried out on switch X33
(see Chapter 4.2).
4 - 8
©
Siemens AG 1992 All Rights Reserved 6ZB5 440-0KP02
WS 400-30/WS 400-50 (Description)
