Siemens SIMATIC S7-300 Reference Manual page 109

Technical specifications of the SM 321; DI 16 x 24 VDC
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
Weight
Data for Specific Module
Supports clocked
operation
Parameter changing during the
RUN is possible
•
Behavior of the non para-
meterized inputs
Number of inputs
Length of cable
•
Unshielded
•
Shielded
Voltages, Currents, Potentials
Power rated voltage of the
electronics and encoder L+
•
Reverse polarity protection
Number of inputs that can be triggered simultaneously
•
Horizontal configuration
Up to 60 _C
•
Vertical configuration
Up to 40 _C
Isolation
•
Between channels and
backplane bus
Permitted potential difference
•
Between the different
circuits
Insulation tested with
Current consumption
•
From the backplane bus
•
From load voltage L +
(without sensor supply VS)
Power dissipation of the module typ. 4 W
Status, Interrupts, Diagnostics
Status display
•
Inputs
•
Sensor power supplies (Vs)
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
40 x 125 x 117
Approx. 200 g
Yes
Yes
gives the last valid
output value before the
parameterization
16
max. 600 m
max. 1000 m
24 VDC
Yes
16
16
Yes
75 VDC / 60 VAC
500 VDC
max. 130 mA
max. 90 mA
Green LED per channel
Green LED per output
Interrupts
•
Hardware interrupt
•
Diagnostic interrupt
Diagnostic functions
•
Group error display
•
Diagnostics information
read-out
Monitoring of
•
Wire-break
Sensor Power Supply Outputs
Number of outputs
Output voltage
•
With load
Output current
•
Rated value
•
Permitted range
Additional (redundant) supply
Short-circuit protection
Data for Selecting a Sensor
Input voltage
•
Rated value
•
For signal "1"
•
For signal "0"
Input current
•
At signal "1"
Input characteristic curve
Connection of Two-Wire
BEROs
•
Permitted bias current
Resistive circuit of the sensor
for detecting broken wires
Time/Frequency
Internal processing time for
status processing (in non
synchronous operation)
•
Release of process and
diagnosis alarm
Input delay
•
Parameters can be
assigned
•
Rated value
Digital Modules
Parameters can be
assigned
Parameters can be
assigned
Parameters can be
assigned
Red LED (SF)
Possible
yes, at I < 1 mA
2
min. L+ (–2.5 V)
120 mA
0 to 150 mA
Permitted
Yes, electronic
24 VDC
13 to 30 V
*30 to + 5 V
typ. 7 mA
According to
IEC 61131, type 2
Possible
max. 2 mA
10 to 18 kOhm
max. 40 ms
Yes
typ. 0.1/0.5/3/15/20 ms
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