ABB AC500 V3 Hardware Manual page 283

Terminals
3.0 to 3.7
4.0 to 4.7
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 2 mA per DC523.
The external power supply connection is carried out via the UP (+24 V DC) and the ZP (0 V DC)
terminals.
The modules provide several diagnosis functions .
2022/01/31
Signal
C8 to C15
C16 to C23
CAUTION!
The process supply voltage must be included in the grounding concept (e. g.
grounding of the negative pole).
WARNING!
Removal/Insertion under power
Removal or insertion under power is only permissible under conditions
described in Hot Swap chapter
The devices are not designed for removal or insertion under power when Hot
Swap conditions do not apply. 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.
NOTICE!
Risk of influences to the connected sensors!
Some sensors may be influenced by the deactivated module outputs of DC523.
Connect a 470 W / 1 W resistor in series to inputs C16/C17 if they are used as
fast counter inputs to avoid any influences.
3ADR010278, 3, en_US
Description
8 digital inputs/outputs
8 digital inputs/outputs
Ä Chapter 1.6 "I/O modules" on page 142.
Device specifications
I/O modules > Digital I/O modules
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