Siemens Simatic M7-400 Reference Manual page 144

Digital Modules
Technical Specifications of the
Dimensions and Weight
Dimensions W H D
(in millimeters)
Weight
Data for Specific Module
Number of inputs
Length of cable
•
Unshielded
•
Shielded
Voltages, Currents, Potentials
Power rated voltage of the
electronics L+
Number of inputs that can be
triggered simultaneously
Isolation
•
Between channels and
backplane bus
•
Between the channels
Permitted potential difference
•
Between the different
circuits
Insulation tested with
•
Channels against
backplane bus and load
voltage L+
Current consumption
•
From the backplane bus
Power dissipation of the
module
4-22
SM 421; DI 32 x 24 VDC
25 290 210 Status display
Approx. 500 g Interrupts
Diagnostic functions
32
Substitute value can be applied
Max. 600 m
Input voltage
•
Max. 1000 m
•
•
Not required
Input current
•
32
Input delay
•
Yes
•
Input characteristic curve
No
Connection of two-wire BEROs
•
75 VDC / 60 VAC
500 VDC
Max. 20 mA
Typ. 6 W
S7-400, M7-400 Programmable Controllers Module Specifications
Status, Interrupts, Diagnostics
Green LED per
channel
None
None
No
Data for Selecting a Sensor
Rated value 24 VDC
For signal "1" 13 V to 30 V
For signal "0" -30 V to 5 V
At signal "1" 7 mA
At "0" to "1" 1.2 ms to 4.8 ms
At "1" to "0" 1.2 ms to 4.8 ms
To IEC 61131; type 1
Possible
Permitted bias current Max. 1.5 mA
A5E00069467-07