Special Characteristic For Operation With A Safe Electrical Extra-Low Voltage - Siemens SIMATIC S7-300 Reference Manual

Digital Modules
Operation with safe electrical extra-low voltage
When using relay output module 6ES7322-5HF00-0AB0 with safe and electrically
isolated extra-low voltage, take the following special characteristic into account:
If a terminal is operated with a safe and electrically isolated extra-low voltage, the
horizontally adjacent terminal must be operated at a rated voltage of not more
than 120 VUC. With operation at voltages greater than 120 VUC, the creepages
and clearances of the 40-pin front connector do not meet the SIMATIC
requirements for safe electrical isolation.
If one of the two horizontally adjacent termi-
nals is operated with a safe electrical extra-
low voltage, the adjacent terminal must be
operated at not more than UC 120 V.
Figure 3-33
Technical specifications of the SM 322; DO 8 x Rel. 230 VAC/5 A
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
Weight
Data for Specific Module
Supports clocked
operation
Number of outputs
Length of cable
•
Unshielded
•
Shielded
Voltages, Currents, Potentials
Rated supply voltage of the
electronics L +
•
Reverse polarity protection
Total current of the outputs
(per group)
•
Horizontal configuration
Up to 60° C
•
Vertical configuration
Up to
40 ° C
Isolation
•
Between channels and
backplane bus
3-102

Special Characteristic for Operation with a Safe Electrical Extra-Low Voltage

40 x 125 x 117
Approx. 320 g
No
8
max. 600 m
max. 1000 m
24 VDC
Yes
max. 5 A
max. 5 A
Yes
•
Between the channels and
the relay supply voltage
•
Between the channels
In groups of
Permitted potential difference
•
Between M and
internal
supply voltage of the relays
•
Between M and
internal
supply voltage of the relays
and the outputs
•
Between the outputs of the
different groups
Programmable Logic Controllers S7-300 Module Data
Yes
Yes
1
75 VDC / 60 VAC
250 VAC
500 VAC
A5E00105505-03