User's Manual

Table Of Contents
Printed Documentation
90
AS4020 Interface Connections
Alarm Wiring 26way High Density Male D-type.
Pin Description
1 DC 3.3V
2 Reset
3 Reset
5 &
22
Service
7 &
24
Attention
9 &
26
Fail
17 Reset
18 Earth
19 Reset
LAT Socket
Pin Description
6 Earth
7 Tx Out
8 Rx In
RS442
Pin Description
1 RX +
2 RX -
3 TX +
6 TX -
Traffic
Pin Description
1 TX+
2 TX -
3 RX+
6 RX -
Management Port
Pin Description
1 TX+
2 TX -
3 RX+
6 RX -
Option Unit
Pin Description
1
RD+ (input to option
card from AC)
2 RD-
4
TD+ (output from
option card to AC)
5 TD -