Selectron CPU 727-T User Manual

CPU 72x
24.05.2019 page 26
EMC Protection Circuitry between Power Supply and Earth
Detailed information regarding the EMC protection circuitry between power supply and
earth connection is contained in the "System Manual MAS 72x", chapter "Installation,
Startup, and Operation", 2.4 EMC Protection Circuitry between Power Supply and Earth
Connection.
1.7.2 Technical Data - Inputs and Outputs
1.7.2.1 Digital Inputs
The normal digital inputs of the CPU 72x have the following input switching:
Fig.18: Connection diagram digital inputs
Legend:
Digital Inputs CPU 72x
-T/LT
-TH/LTH
Input type as per IEC 61131-2
Type 1
Display
LED green, lights up with signal = 1
Input voltage
0…24 Vdc
0…36 Vdc
Limits
-30.0…+30.0 Vdc
-45.0…+45.0 Vdc
for signal = 0
< 5 Vdc
< 7.5 Vdc
for signal = 1
> 14 Vdc
> 19 Vdc
Input resistance typ.
3.9 k
6.8 k
Input current with signal = 1 typ.
6 mA
1)
5.3 mA
1)
Input delay typ.
0.6 ms (input filter)
Adjustable via software
5.6 ms
Potential insulation
Input  logic
Yes, simple insulation
Input  input
No
Effect with cross-polarity of inputs
No destruction, no high currents
1)
at UC = Nominal value
IMPORTANT
Paralleling of inputs not allowed!
LED
Input
0V

Selectron CPU 727-T Specifications

General

Brand	Selectron
Model	CPU 727-T
Category	Computer Hardware
Language	English