Siemens Simatic M7-400 Bedienungsanleitung Seite 177

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Seitenansicht 176
Digital Modules
4-55
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Technical Specifications of the SM 421; DI 16 x 120/230 VUC
Dimensions and Weight
Dimensions W H D
(in millimeters)
25 290 210
Weight Approx. 650 g
Data for Specific Module
Number of inputs 16
Length of cable
Unshielded
Shielded
600 m
1000 m
Voltages, Currents, Potentials
Power rated voltage of the
electronics L+
None
Number of inputs
that can be triggered
simultaneously
16
Isolation
Between channels and
backplane bus
Yes
Between the channels Yes
In groups of 4
Permitted potential difference
Between M
internal
and the
inputs
250 VAC
Between the inputs of the
different groups
500 VAC
Insulation resistance 4000 VAC
Current consumption
From the backplane bus Max. 80 mA
Power dissipation of the
module
Typ. 12 W
Status, Interrupts, Diagnostics
Status display Green LED per
channel
Interrupts None
Diagnostic functions None
Substitute value can be applied No
Data for Selecting a Sensor
Input voltage
Rated value
For signal “1”
120/230 VUC
74 to 264 VAC
80 to 264 VDC
–80 to –264 VDC
For signal “0” 0 to 40 VAC
–40 to +40 VDC
Frequency range 47 to 63 Hz
Input current
At signal ”1” (120 V) Typ. 10 mA AC
Typ. 1.8 mA DC
At signal ”1” (230 V) Typ. 14 mA AC
Typ. 2 mA DC
At signal “0” 0 to 6 mA AC
0 to 2 mA DC
Input delay
At “0” to “1” Max. 20 ms AC
Max. 15 ms DC
At “1” to “0” Max. 30 ms AC
Max. 25 ms DC
Input characteristic curve To IEC 61131;
type 2
Connection of two-wire BEROs
Permitted bias current
Possible
Max. 5 mA AC
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