Gewiss 20 Series Operating Instructions Manual page 13

3. EXPLODED VIEW OF THE SIREN
4. DRAWING OF A WIRELESS SYSTEM
GW 20477
IR DETECTOR
GW 20478
TRANSMITTER
GW 20479
TRANSMITTER
GW 20472
REMOTE CONTROL
A = Electronic circuit.
B = 4 Ohm magnetodynamic horn.
C = Battery pack with release connector.
D = Microswitch to prevent opening and removal.
E = Lower flashing indicator crown with front
flashing circuit with highly efficient and
extremely bright indicator LEDs.
F = Front fastening screws.
G = Closure cap.
GW 20470 AND
GW 20471
CONTROL UNITS
GENERAL ALARM
relay output compatible with
any separately powered
telephone communicator
13
GW 20490
wireless sirens
SELF-POWERED
with Battery Pack
Alternative cable
input for magnetic
detectors...
ALTERNATIVE USE IF THE
RADIO CHANNELS 15 and 16:
2 areas with NC inputs, for the
cable connection of normal
magnetic detectors or other
types of detectors that do not
need power from the GW
20470 Control Unit
Alternative cable input for
gas, CO, flood detectors...
GW 20490
E
N
G
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