Siemens Sinorix al-deco STD Operating Handbook page 10

Description of the extinguisher system
Pressure switch 1
Pressure switches 2 + 3
DS2
DS3
Extinguisher line including the extinguisher nozzles
Communication Interface
10
Building Technologies
Fire Safety
A pressure switch is mounted on the valve, which is tripped when the
pressure in the detection tube falls, the ball valve is opened or
extinguishing procedure is initiated. The pressure switch can only be
brought back to its initial position when the extinguisher container has
been refilled or replaced (see Maintenance and Repair Instructions).
Pressure switch 1 (DS1) only drives Relay 1 (fire alarm). This alarm is
made available as 2 NC contacts on Terminals 22/23 and 24/25. These
outputs are intended for additional functions such as alarming the fire
alarm centre, and should not be used for the Machine Emergency Stop.
Pressure switches 2 + 3 are bolted onto a common distributor block.
This distributor block is normally mounted on the extinguisher container
bracket or, in individual cases, on the machine housing in the
immediate vicinity of the extinguisher container. Pressure switch 2
(DS2) takes over the „Machine EMERGENCY STOP" function and is
connected directly from the input terminals 10/11 to the output
terminals 12/13 within the Alarm interface. Pressure switch 3 (DS3) is
responsible for the alarm (optical/acoustic) and data recording
functions. Both pressure switches are tripped when the pressure in the
detection tube falls. The pressure switches can only be brought back to
their initial position when the extinguisher container has been refilled or
replaced (see Maintenance and Repair Instructions).
If the valve of the extinguisher container is opened, the extinguisher
flows through a separate extinguisher line and the correspondingly
positioned extinguisher nozzles, and floods the machine tool (see
Chapter „5 What happens when there's a fire?").
The communication interface is mounted on the extinguisher container
or on the machine tool. It is supplied by the 115 VAC, 230 VAC or 24
VDC and is connected to the DIMES, the ball valve monitoring and
den the pressure switches DS1 + DS3.
It indicates the status of the extinguisher system by means of various
optical and acoustic signals (see Chapter „3.1 Communication
Interface "). If there is a power failure, a battery ensures the problem-
free operation of the communication interface for up to 12 hours (see
Chapter „3.5 Loss of mains power").
A54475-A1-A2_EN_05.docx
01.2018