66250754-EN - V1.0 - 18/02/19
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4000 Series GSM Audio Intercom - Technical Manual
4000 Series GSM Audio Intercom with Proximity
Wiring Diagrams
GSM4K CONNECTIONS
Fig.24 shows the wiring connections for a GSM4K-1/GSM4K-1S audio kit.
For fail secure locks a
MOV must also be tted
across terminals C & NO and
for fail safe locks across C & NC.
For fail safe lock wiring move
lock wire from NO to NC.
Fig. 24
GSM4KCR CONNECTIONS
Fig.25 shows the wiring connections for a GSM4KCR-1/GSM4KCR-1S audio kit when the Art.4903 is used as a standalone keypad.
Fig.26 shows connections for a GSM4KCR-1/GSM4KCR-1S audio kit when the additional access code features of the GSM PRO
module are required when connecting it with the RS485 bus terminals to the Art.4903 keypad.
Art.4810
OFFON
RS485 BUS TERMINATION
MOV
NO1 NC1
NO2 NC2
Art.4903
Fail Secure
Lock Release
To Antenna
For fail safe lock wiring move lock
wire from NO1 to NC1 and move
JP2 jumper to the NC1 position
Art.4810
OFFON
RS485 BUS TERMINATION
MOV
NO1 NC1
NO2 NC2
Art.4903
To Antenna
Volt Free
Contacts
120Ω resistor
tted across A & B
unless connected
to an Art.481
RS485 bus termination
jumper in ON position
RS485 bus cable
(2 core twisted or CAT-5 where: 1 core = A, 1 core = B, 1 pair = 0V/GND)
For volt free contacts to gate
controls remove JP2 jumper
Fig. 25 Fig. 26