ABB ACS580-01 Hardware Manual page 100

100 Electrical installation
Switches
Switch
S1 Determines whether analog input AI1 is
used as a voltage or current input.
(AI1)
S2 Determines whether analog input AI2 is
used as a voltage or current input.
(AI2)
S3 Determines whether analog output AO1 is
used as a current or voltage output.
(AO1)
S4 Modbus link termination. Must be set to the
terminated (ON) position when the drive is
(TERM)
the first or last unit on the link.
S5 Switches on the biasing voltages to the
bus. One (and only one) device, preferably
(BIAS)
at the end of the bus must have the bias
on.
Description Position
Voltage (U) (default)
U I
AI1
Current (I)
U I
AI1
Voltage (U)
U I
AI2
Current (I) (default)
U I
AI2
Current (I) (default)
I U
AO1
Voltage (U)
I U
AO1
Bus not terminated
ON
(default)
TERM
Bus terminated
ON
TERM
Bias off (default)
ON
BIAS
Bias on
ON
BIAS