Technical Manual

Technical Manual RF Mono
Connections v1.4 Page 16 of 47
5.6.2 I/O connections
The RF Mono 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 RF Mono board or
on the power supply! Use the I/O’s “GND” connector to connect to the ground.
The I/O’s 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 7 shows the proper way to connect a “Forced Alarm” pushbutton between “I/O1”
and GND”.
Figure 7: Proper I/O connections for the RX
Push button
FTP cable
GND
IO2
IO1
5V