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
Art.4810
To Antenna
UNIT ID.1
RS485 bus
termination
jumper in
OPEN position
Art.4850R
UNIT ID.2
RS485 bus
termination
jumper in
OPEN position
Art.4850R
UNIT ID.7
RS485 bus
termination
jumper in
CLOSED position
Art.4850R
UNIT ID.8
485 / 232
RS-485
USB-PC
A B GND
RS-232
Art. 481
USB-Serial Converter
Open
Close
BUS
Termination
RS485 bus
termination
jumper in
CLOSED position
switch to RS485 position
USB cable
Volt Free Contacts
Volt Free Contacts
Volt Free Contacts
RS485 bus wires and
common GND wire.
Networked Art.4850R readers:
UNIT ID’s 3, 4, 5 and 6
Volt Free
Contacts
NOTES: Connecting to a PC using the Art.481 is optional and only required if
permanently connecting to a PC and can be used as an alternative means of
PC programming to using the USB connection. Remember the GSM PRO
module can be connected directly to the PC using the USB connection and
then an RS485 bus connection used to connect the other devices.
Fig. 42
IMPORTANT NOTE: For each additional Art.4850R proximity reader a 12Vdc power supply (HDR-15-12) will be required.
RS485 Network Connection
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