Terminal Signal Description
4.6 C22 Signal of the configurable digital input/
output C22
4.7 C23 Signal of the configurable digital input/
output C23
4.8 UP Process voltage UP (24 VDC)
4.9 ZP Process voltage ZP (0 VDC)
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 DA501.
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.
NOTICE!
Risk of damaging the PLC modules!
The PLC modules must not be removed while the plant is connected to a power
supply.
Make sure that all voltage sources (supply and process voltage) are switched
off before you
– connect or disconnect any signal or terminal block
– remove or replace a module.
CAUTION!
Risk of imprecise and faulty measurements!
Analog signals may be distorted seriously by external electromagnetic influ-
ences.
Use shielded wires when wiring analog signal sources. The cable shield must
be grounded at both ends of the cable. Provide a potential equalization of a low
resistance to avoid high potential differences between different parts of the
plant.
I/O Modules > Digital/Analog I/O Modules
2019/04/173ADR010121, 13, en_US572
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