6-3
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
The following table shows the technical data of the digital inputs of the C7
CPU.
Module-Specific Data
Number of inputs 16
Cable length
S Unshielded max. 600 m
Voltages, Currents, Potentials
Rated load voltage L+
S Re verse polarity
protection
DC 24 V
yes
Number of simultaneously
accessible inputs
16
Floating no
Status, Interrupt, Diagnostics
Interrupts no
Diagnostic functions no
Data for Selecting a Sensor
Input voltage
S Rated value
S For signal “1”
S For signal“0”
DC 24 V
11 to 30 V
-3 to +5 V
Input current
S For signal “1” Typically 7 mA
Input delay
S From “0” to “1”
S From “1” to “0”
1.2 to 4.8 ms
1.2 to 4.8 ms
Input characteristics Complying with IEC
1131, Type 2
Connection of 2-wire BEROs
S Permitted closed-circuit
current
Possible
max. 2 mA
Digital Input
C7-621 Digital I/Os
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