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SIMATIC S7 Ex Digital Modules
Digital output SM 322; DO 4 x 15V/20mA
Dimensions and Weight
Dimensions W x H x D (mm) 40 x 125 x 120
Weight approx. 230 g
Module-specific data
Number of outputs 4
Line length, shielded max. 200 m
Type of protection PTB
(see Appendix A)
2-26
[EEx ib] IIC
to EN 50020
Test number Ex-96.D.2102 X
Type of protection FM
(see Appendix B)
Voltages, currents, potentials
Bus power supply
Rated load voltage L+
Reverse voltage protection
Total current of outputs
Horizontal arrangement up
to 60 C
Vertical arrangement up to
40 C
CL I, DIV 2,
GP A, B, C, D T4
5 V DC
24 V DC
yes
No restrictions
No restrictions
Galvanic isolation
Between channels and
backplane bus
yes
Between channels and load
voltage L+
yes
Between channels yes
Between backplane bus
and load voltage L+
yes
Permissible difference in potential (UISO) of signals
from hazardous area
Between channels and
backplane bus
Between channels and load
voltage L+
60 V DC
30 V AC
60 V DC
30 V AC
Between channels 60 V DC
30 V AC
Between backplane bus
and load voltage L+
60 V DC
30 V AC
Voltages, currents, potentials continued
Permissible difference in potential (UISO) for signals
from non-hazardous area
Between channels and
backplane bus
Between channels and load
voltage L+
400 V DC
250 V AC
400 V DC
250 V AC
Between channels 400 V DC
250 V AC
Between backplane bus
and load voltage L+
Insulation tested
Channels with respect to
backplane bus and load
voltage L+
Channels among each
other
Between load voltage L+
and backplane bus
Current input
From backplane bus
From load voltage L+
(at rated data)
75 V DC
60 V AC
with 1500 V AC
with 1500 V AC
with 500 V DC
max. 70 mA
max. 160 mA
Module power loss typical 3 W
Status, interrupts, diagnostics
Status indication
Outputs green LED per channel
Interrupts
Diagnostic interrupt configurable
Diagnostic functions
Group fault indication red LED (SF)
Channel fault indication red LED (F)
per channel
Diagnostic functions
readout
possible
Monitoring for
Short-circuit I 20.5 mA (10%)
Wire break I 0.15 mA
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04