Terminals Signal Description
1.0 to 1.7 I0- to I7- Negative poles of the first 8
analog inputs
2.0 to 2.7 I0+ to I7+ Positive poles of the first 8
analog inputs
3.0 to 3.7 I8- to I15- Negative poles of the fol-
lowing 8 analog inputs
4.0 to 4.7 I8+ to I15+ Positive poles of the following
8 analog inputs
CAUTION!
The negative poles of the analog inputs are electrically connected to each other.
They form an "Analog Ground" signal for the module. The negative poles of the
analog outputs are also electrically connected to each other to form an "Analog
Ground" signal.
CAUTION!
There is no galvanic isolation between the analog circuitry and ZP/UP. There-
fore, the analog sensors must be electrically isolated in order to avoid loops via
the earth potential or the supply voltage.
CAUTION!
Because of their common reference potential, analog current inputs cannot be
circuited in series, neither within the module nor with channels of other mod-
ules.
For the open-circuit detection (cut wire), each analog input channel is pulled up
to "plus" by a high-resistance resistor. If nothing is connected, the maximum
voltage will be read in then.
The internal power supply voltage for the module's circuitry is carried out via the I/O bus (pro-
vided by a bus module or a CPU). Thus, the current consumption from 24 VDC power supply at
the terminals L+/UP and M/ZP of the CPU/bus module increases by 2 mA per AI523.
The external power supply connection is carried out via the UP (+24 VDC) and the ZP (0 VDC)
terminals.
NOTICE!
Risk of damaging the PLC modules!
Overvoltages and short circuits might damage the PLC modules.
– Make sure that all voltage sources (supply and process voltage) are
switched off before you begin with operations at the system.
– Never connect any voltages or signals to reserved terminals (marked with
---). Reserved terminals may carry internal voltages.
I/O Modules > Analog I/O Modules
2019/04/173ADR010121, 13, en_US454
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