Kemppi AX MIG Welder Operating Manual page 42

Power supply configuration
Each digital IO add-on card requires an external power supply (not delivered with the AX MIG Welder equipment). The
external power supply's minimum supply current is determined based on the output current taken from the outputs and
the minimum current used by the digital IO add-on card.
• Example 1: If the output current is 1 A per output and all outputs are active, then the external power supply must
be able to supply at least 8.2 A.
• Example 2: If the output current is 0.1 A per output and all outputs are active, then the external power supply must
be able to supply at least 0.9 A.
The pins of the power supply terminal are as follows:
1. 24 V
2. GND
3. 24 V
4. GND
Output configuration
Outputs on a digital IO add-on card are implemented with MOSFET switches and the outputs are short-circuit protected.
Each output of the digital IO add-on card has two output configuration options:
• The output is used as a sourcing output so that 24 V is provided to the external device when the output is activ-
ated.
• The output is used as an inverted sinking output so that when the output is set to inactivate state, it provides a
grounded connection to the external device.
The pins of an output terminal are as follows:
1. 24 V
2. Sinking output (GND)
3. Sourcing output (24 V)
4. GND
The following figures display the output configuration options:
Sourcing output configuration
Input configuration
The inputs on a digital IO add-on card are passive inputs that activate when 24 V is supplied to them.
The pins of an input terminal are as follows:
© Kemppi
Sinking (inverted) output configuration
42
AX MIG Welder
Operating manual - EN
1921900 / 2318