Reaction Of The Ps 307 Power Supply Module (5 A To Atypical Operating Conditions - Siemens SIMATIC S7-300 Reference Manual

Line protection
We recommend that you install a miniature circuit-breaker (MCB) (for example
Siemens 5SN1 series) with the following rating to protect the incoming supply
cable of the PS 307 power supply module (5 A):
• Rated current at 230 VAC: 10 A
• Tripping characteristic (type): C.
Reaction to atypical operating conditions
Table 2-3
... the output circuit is overloaded:
•
I > 6.5 A (dynamic)
•
5 A < I v 6.5 A (static)
... the output is short-circuited
An overvoltage occurs on the primary
side
There is an undervoltage on the
primary side
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Reaction of the PS 307 Power Supply Module (5 A) to Atypical Operating
Conditions
If ... ... Then ...
Voltage dip, autom. volt. recovery
Voltage drop, shortening of service life
Output voltage 0 V; automatic voltage recovery
after short circuit has been eliminated
Possible destruction
Automatic disconnection; automatic voltage
recovery
Power Supply Modules
24 VDC
LED
Flashes
Dark
–
Dark
2-11