30
ADwin-Gold
Hardware Manual, Version 2.3
ADwin
8.1 Digital Inputs
If not requested otherwise,
the input voltage range of
the digital inputs is set to
24 Volt. The setting can be
changed by jumpers to 5
or 12 Volt (see right). The
switching thresholds for
the logic level can be
found in the chapter about
the technical features of
the OPT add-on.
For adjusting the jumpers you have to open the chassis (see chapter 6.2). The
position of the jumpers is shown in the picture below at left.
The system, which is connected to the digital input, must be capable of driving
a current of at least 7 mA, in order to light up the LED in the optocoupler.
8.2 Digital Outputs
After you have connected
an external voltage be-
tween 5 and 30 Volt to V
CC
(Pin 12, CONN. 2) and
OPT-GND (Pin 13, CONN.
2), the output transistor will
be able to supply the volt-
age to the relevant output
(CONN. 2). The positive
power rail V
CC
is switched
and not the ground rail
(GND) as commonly used
and known as open-
collector output.
Depending on the output current I
MAX
and the connected V
IN
(=Vcc) the transistor
causes a voltage drop between 0.7 and 1.2 Volt. An inverse diode protects the
transistor during switching of an inductive load against overvoltage.
OPT-GND
24V
12V
5V
Vin
4k3
2k
560
OPT-GND
Vee
Vcc
1N4004
10k
BC489
10k
10k
Voltage ranges
Input current
Design and configuration
8. OPT Add-on
