Connection Of Led Indicators; Connection Of Keypad/Buttons - 2N Helios IP Audio Kit Installation Manual

Connection of LED Indicators

®
2N Helios IP Audio Kit
outputs (LED1±, LED2± and LED3± terminals). All of them are current outputs (20 mA,
up to 12 V). You can connect the LEDs directly to the terminals of these outputs or use
LEDs with serial resistors. Mind the polarity while connecting the LEDs to make your
device work properly.
The functions of the LED1, LED2 and LED3 outputs are programmable.

Connection of Keypad/Buttons

®
2N Helios IP Audio Kit
matrix keypad or up to 16 separate buttons; see the figure below:
The buttons are connected in a 4 × 4 matrix to the ROW1–4 (output) and COL1–4
(inputs) terminals. If you do not make use of all of the 16 buttons, you can leave some
of the ROW and COL signals unconnected. If you need one button only, connect it to
the ROW1 and COL4 terminals.
The button function is programmable. You can set the numerical keypad buttons to
any matrix position (0 to 9, *, #) or configure one of the 16 buttons for dialling a
telephone directory position.
Caution
Errors such as false keystroke detection may occur in installations with
strong EMI. Therefore, make sure that the keypad or button cables are
carried in a trunk separated from the power cables and are as short as
possible (up to 1 m).
2N TELEKOMUNIKACE a.s., www.2n.cz
is equipped with three independent current LED control
is equipped with an interface for connection of an external
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