ABB AC500 PLC Hardware Manual page 1049

Terminal 3.8: Process supply voltage UP3 = +24 VDC
Terminals 1.9, 2.9 and 3.9: Process supply voltage ZP = 0 V.
The assignment of the other terminals:
The assignment of the other terminals:
Terminal
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2019/04/17
With a separate UP3 power supply, the digital outputs can be switched off exter-
nally. This way, an emergency-off functionality can be realized.
Do not connect any voltages externally to digital outputs!
This ist not intended usage.
Reason: Externally voltages at one or more terminals DC0..DC7 or DO0..DO7
may cause that other digital outputs are supplied through that voltage instead of
voltage UP3 (reverse voltage).
This is also possible, if DC channels are used as inputs. For this, the source for
the input signals should be the impressed UP3 of the device.
This limitation does not apply for the input channels DI0..DI7.
CAUTION!
Risk of malfunction by not intended usage!
If the function cut off of the digital outputs should be used by deactivation of the
supply voltage UP3, be sure that no external voltage is conncted at the outputs
DO0...DO7 and DC0...DC7.
Signal
DC0
DC1
DC2
DC3
DC4
DC5
DC6
DC7
UP
ZP
DI8
DI9
3ADR010121, 13, en_US
Communication Interface Modules (S500) > PROFINET
Description
Signal of the configurable digital input/output
DC0
Signal of the configurable digital input/output
DC1
Signal of the configurable digital input/output
DC2
Signal of the configurable digital input/output
DC3
Signal of the configurable digital input/output
DC4
Signal of the configurable digital input/output
DC5
Signal of the configurable digital input/output
DC6
Signal of the configurable digital input/output
DC7
Process voltage UP (24 VDC)
Process voltage ZP (0 VDC)
Signal of the digital input DI8
Signal of the digital input DI9
Device Specifications
1049