ABB IRB 2000 - Page 144

3.11
Analog I/O (option)
One analog I/O board can be placed at board position 1. A board is available for analog
inputs/outputs with:
• 4 inputs for 0 - ±10 V
• 3 voltage outputs for 0 - ±10 V
• 1 current output for 0 - ±20 mA
As a alternative is a combined I/O board available, see 3.11.3.
The inputs and outputs belong to a common group which is galvanically isolated from the
electronics of the control cabinet. The analog I/O-board is placed on I/O-board position
KD26.168) but connected to a separate contact.
The analog inputs and outputs in the robot system can be supplied with an internal ±15 V
voltage from the control cabinet or with an external ±15 V voltage. When internal ±15 V
voltage is used, there is no galvanic isolation between the analog inputs/outputs and the
control cabinet electronics.
The function of the analog I/O board is shown in principle in the following figure:
Control
program
D/A-
convertor
id
A/D-
convertor
0 V-signal
+15V EXT
-15 V EXT
OVEXT
"• +15 VINT
-• -15 VINT
OVINT
INSTALLATION
3:30