Wiring Example - Siemens Sinamics G120P Instruction Manual

3.3 application cases
In the event of a fire, the G120P can automatically switch over to the essential service mode (ESM), ensur-
ing that the system ignores all external faults and alarms. The goal is to maintain an overpressure condi-
tion through ventilation as long as possible so that escape routes are kept free of smoke and doors can
still be easily opened. This example shows you how to parameterize a pressure-controlled ventilation
combined with ESM operation using the STARTER software.

Wiring example

Fault
Operation
STARTER software and PC:
74
DIP switch for AI0
and AI1 (terminals
3/4 and 10/11)
Application cases
Output current (0..20 mA)
Pressure sensor
0-10 V, e.g.
QBM66.202
Speed (0..20 mA)
Alarm
PTC A / PTC B
GND / DI COM
ON / OFF
ESM Activation
In our example, the ventilation is
operated by a proportional-inte-
gral-derivative controller (PID).
NOTE