Table 74: Assignment of the other terminals:
Terminals
Signal
Description
1.0 to 1.7
I0 to I7
Input signals of the 8 digital
inputs
1.8 to 4.8
UP
Process supply v24 V
DC
1.9 to 4.9
ZP
Reference potential for the 8
digital inputs and the process
supply voltage
2.0
R0
Common contact of the first
relay output
3.0
NO 0
Normally-open contact of the
first relay output
4.0
NC 0
Normally-closed contact of the
first relay output
2.1
R1
Common contact of the
second relay output
3.1
NO 1
Normally-open contact of the
second relay output
4.1
NC 1
Normally-closed contact of the
second relay output
:
:
:
2.7
R7
Common contact of the eighth
relay output
3.7
NO 7
Normally-open contact of the
eighth relay output
4.7
NC 7
Normally-closed contact of the
eighth relay output
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 DX522.
The external power supply connection is carried out via the UP (+24 V DC) and the ZP (0 V DC)
terminals.
Device specifications
I/O modules > Digital I/O modules
2022/01/31
3ADR010278, 3, en_US
330