ABB AC500 V3 Hardware Manual page 234

Device specifications
I/O modules > Digital I/O modules
Terminal
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 DO573.
The external power supply connection is carried out via the L+ (+24 V DC) and the M (0 V
DC) terminals. The M terminal is electrically interconnected to the M/ZP terminal of the CPU/
communication interface module.
For screw-type terminals only:
234
Signal
NO13
NO14
NO15
R8..15
L+
M
WARNING!
Risk of death by electric shock!
Hazardous voltages can be present at the terminals of the module.
Make sure that all voltage sources (supply voltage and process supply voltage)
are switched off before you begin with operations on the system.
WARNING!
For screw terminals only: Danger of death by electric shock!
The IP 20 protection degree is only provided if all terminal screws are tightened.
Tighten all screws of unused load terminals of relay outputs if voltages > 24 V
are connected to the relay group.
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.
3ADR010278, 3, en_US
Description
Normally-open contact of the output NO13
Normally-open contact of the output NO14
Normally-open contact of the output NO15
Output common for signals NO8 to NO15
Process voltage L+ (24 V DC)
Process voltage M (0 V DC)
2022/01/31