General Directions For Installation - Videx 4000 Series Technical Manual

4000 Series GSM Audio Intercom with Proximity

General Directions for Installation

CABLE SIZE GUIDE
POWER SUPPLY AND LOCK RELEASE CONNECTIONS
Refer to the table below for the connections for the power supply output to the Art.4810 GSM PRO intercom and the lock release
connections.
Distance
Cross Sectional Area (CSA)
Ideally the power supply should be located as close to the intercom panel as possible for best performance. The maximum
acceptable resistance for the above cables = 3Ω or less for best possible performance.
RS485 CONNECTIONS
A CAT-5 cable is acceptable where 1 pair is used for the 0V/GND connection and a second pair
is split between the A and B connections (i.e. 1 core of the pair is used for the A terminal, 1
core of the pair is used for the B terminal, see Fig.43).
The total overall distance between the first RS485 device in line (Art.481 or GSM PRO module)
and the last RS485 device in line (Art.4903 or Art.4850R) should be no more than 500m max. for
the best possible performance, see Fig.44. It is also important that the end of line RS485 bus
termination of the respective device (Art.4903 or Art.4850R) is in the ON position, in the case
of the GSM PRO module a 120 Ohm resistor should be fitted across the A and B bus terminal
connections (unless it's connected with an Art.481, in which case the bus termination jumper
on the Art.481 should be in the closed position as this would be the last RS485 device in line).
First device
in line
RS-232
485 / 232
Art. 481
USB-Serial Converter
RS-485
BUS
Termination A B GND
Open
USB-PC
Close
RS485
Fig. 44
IMPORTANT NOTE: Only bare copper (BC) cable should be used (solid or stranded is acceptable). Please be aware that when
selecting a cable the following should NOT be used: Copper Coated Steel (CCS) and Copper Clad Aluminium (CCA). While these
types of cable may offer a low cost solution they will have a higher resistance than pure copper cable and can affect the overall
performance of the system therefore Videx DO NOT recommend these types of cable.
GENERAL INSTALLATION NOTES
• Check that all components are free from damage before installing (do not proceed with installation in the event of damage).
• Keep all packaging away from children (please dispose of any excess waste and packaging responsibly).
• Do not obstruct the ventilation openings or slots on any of the devices.
• All connections to mains voltages must be made to the current national standards (I.E.E. wiring regulations for the UK or the
appropriate standards of your country if installing overseas).
• Install an appropriate fused spur or isolation switch to isolate the mains.
• Isolate the mains before carrying out any maintenance work on the system.
• Avoid water ingress into the rear of the module, always seal the module frame after installation using a suitable silicon based
sealant.
• All intercom and access control cables must be routed separately from the mains (ideally in a separate cable tray or duct).
4000 Series GSM Audio Intercom - Technical Manual
0.5mm
UNIT ID.1
Art. 4810-1
Art. 4903
UNIT ID.2
Art. 4850R
RS485
20m
2
UNIT ID.3
Art. 4903
RS485
CAT-5 cable 500m (max.)
- 30 -
50m
1.0mm
2
CAT-5 cable
Fig. 43
UNIT ID's 4, 5, 6 and 7
RS485
66250754-EN - V1.0 - 18/02/19
100m
1.5mm
2
Last device
in line
UNIT ID.8
Art. 4903