Technical Manual

Technical Manual AM Systems
Connections v4.4 Page 31 of 72
6.10.3 I/O connections
The AM TRX board is equipped with two I/O’s which can be used for connecting a
pushbutton (Forced Alarm option) or as output for other external devices (e.g. camera).
To avoid interference, caused by the wires which will be connected to any of the I/O’s, it
is very important to only connect the wires to the I/O connector contacts.
Do not connect any of the wires directly to a GND contact on the TRX board or on
the power supply! Use the “GND” connector to connect to the ground.
The I/Os have a current limit of 70mA. Do not connect devices to the I/Os that draw more
than 70mA, else the I/O drivers will get damaged!
Figure 16 shows the proper way to connect a “Forced Alarm” pushbutton between “I/O1”
and “+”.
Figure 16: Proper I/O connections
+
I/O2
I/O1
GND
FTP
TRX board