ABB AC500 V3 Hardware Manual page 259

Terminal
13
14
15
16
17
18
19
20
The internal power supply voltage for the module's circuitry is carried out via the I/O bus
(provided by a communication interface module or a CPU). Thus, the current consumption from
24 V DC power supply at the terminals L+/UP and M/ZP of the CPU/communication interface
module increases by 5 mA per DX571.
The external power supply connection is carried out via the L+ (+24 V DC) terminal. The
negative pole of the external power supply is realized via the I/O bus. Therefore, the CPU/
communication interface module and the DX571 must have a common power supply.
2022/01/31
Signal
NO3
R0...3
NO4
NO5
NO6
NO7
R4...7
L+
WARNING!
Removal/Insertion under power
The devices are not designed for removal or insertion under power. Because of
unforeseeable consequences, it is not allowed to plug or unplug devices with
the power being ON.
Make sure that all voltage sources (supply and process voltage) are switched
off before you
– connect or disconnect any signal or terminal block
– remove, mount or replace a module.
Disconnecting any powered devices while energized in a hazardous location
could result in an electric arc, which could create a flammable ignition resulting
in fire or explosion.
Make sure that power is removed and that the area has been thoroughly
checked to ensure that flammable materials are not present prior to proceeding.
The devices must not be opened when in operation. The same applies to the
network interfaces.
NOTICE!
Risk of damaging the PLC modules!
Overvoltages and short circuits might damage the PLC modules.
– Make sure that all voltage sources (supply voltage and process supply
voltage) are switched off before you begin with operations on the system.
– Never connect any voltages or signals to reserved terminals (marked with
---). Reserved terminals may carry internal voltages.
3ADR010278, 3, en_US
Device specifications
I/O modules > Digital I/O modules
Description
Normally-open contact of the
output 3
Output common for signals
O0 to O3
Normally-open contact of the
output 4
Normally-open contact of the
output 5
Normally-open contact of the
output 6
Normally-open contact of the
output 7
Output common for signals
O4 to O7
Process voltage +24 V DC
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