Siemens SIMATIC S5-100U, System Manual

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S5-100U Module Spectrum
Digital Input Module 8 × 24 V DC (6ES5 421-8MA12)
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+9 V
GND
Data
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DIGITAL INPUT
8 x 24 V DC
6ES5 421-8MA12
1 2 3 4 5 6
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Technical specifications
Number of inputs 8
Galvanic isolation no
- in groups of 8
Input voltage L+
- rated value
24 V DC
- ”0” signal 0 to 5 V
- ”1” signal 13 to 33 V
Input current at ”1”
signal
typ. 7 mA at 24 V
Inherent delay
- from ”0” to ”1”
typ. 2.3 ms
- from ”1” to ”0” typ. 3.5 ms
Length of cable
- unshielded
max. 100 m (330 ft.)
Insulation rating VDE
Rated insulation voltage *
(+9 V to )
12 V AC
- insulation group 1×B
Fault LED (red) no input voltage
L+/M
Permissible ambient
temperature of module
- horizontal arrangement
0 to 60 °C
(32 to 140 °F)
- vertical arrangement 0 to 40 °C
(32 to 104 °F)
Connection of 2-wire
BERO proximity switches
possible
- residual current 1.5 mA
Current consumption
from +9 V (CPU)
typ. 34 mA
Power loss of the
module
typ. 1.6 W
Weight approx. 190 g (6.7 oz.)
* Relevant only for isolated assembly in the
ET 100/200U
EWA 4NEB 812 6120-02b
14-17