ABB AC500 V3 Hardware Manual page 54

Device specifications
Processor modules > AC500-eCo
The digital inputs can be used as source inputs or as sink inputs.
The following figure shows the connection of the option board for digital I/O extension
TA5101-4DI:
Sink inputs of TA5101-4DI
The module provides several diagnosis functions, see Diagnosis
The meaning of the LEDs is described in the section State LEDs
54
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
"NC"). Reserved terminals may carry internal voltages.
NOTICE!
Risk of malfunctions in the plant!
A ground fault, e. g. caused by a damaged cable insulation, can bridge switches
accidentally.
Use sink inputs when possible or make sure that, in case of error, there will be
no risks to persons or plant.
3ADR010278, 3, en_US
Source inputs of TA5101-4DI
Ä "Diagnosis" on page 55.
Ä "State LEDs" on page 55.
2022/01/31