5
Connections
• Wiring.
Input 1 (Orange)
Upper left pushbutton LED
Input 3 (Green)
Upper centre pushbutton LED
Input 5 (Purple)
Upper right pushbutton LED
Input 7 (White)
Colour of all LEDs in the device
Input 9 (Red)
Do not connect
Pin 11 (White/Red)
Inputs common
Input 2 (Pink)
Lower left pushbutton LED
Input 4 (Brown)
Lower centre pushbutton LED
Input 6 (Black)
Lower right pushbutton LED
Input 8 (Grey)
Select with or without feedback mode
Input 10 (Blue)
Do not connect
Pin 12 (Yellow)
Do not connect
2
4
6
8
10
12
Input 7 can be in PWM and this makes it possible to set the colours of all the LEDs of the device (see the paragraph "LED Configuration").
3.1.1 Input connection
The inputs are not polarised and are isolated from the device's supply voltage by functional isolation (non-reinforced); this allows the connection of input signals
with reference voltages that differ from the supply voltage of the 21126 control, provided they have SELV power supplies.
A PWM signal can be connected to input 7.
Illustrated below are two examples of the wiring layouts that can be achieved.
Example 1: Connection via contacts that close to the power supply negative (-) (most frequently used case).
The inputs can be connected to the device's power supply negative (-) by means of a switch.
Open collector outputs of a third-party device can be used as switches (provided it is checked beforehand that these outputs have appropriate maximum voltage
and current values).
The inputs common is to be connected directly to the power supply positive (+).
9-32V
100mA
INPUTS
I2
I4
I6
I8
NC
NC
I1
I3
I5
I7
NC
C IN
O1
O2
O3
O4
O5
O6
NC
O7
C OUT
OUTPUTS
C IN
–V
+V
I1
I2
