Distance Between Readers - Gallagher T12 Manual

Cable distance
Cable type
CAT 5e or
be er**
BELDEN
9842**
(shielded)
SEC472
SEC4142
C303900/
C303901
Gallagher
HBUS Cable
* The matching of wire sizes to equivalent wire gauges are only approximate.
** Recommended cable types for op mal HBUS RS485 performance.
*** Not applicable for Bluetooth® enabled reader installa ons.
**** Tested with 13.6V at start of cable.
Notes:
• Shielded cable may reduce the obtainable cable length. Shielded cable should be
grounded at the Controller end only.
• If other cable types are used, opera ng distances and performance may be reduced
depending on the cable quality.
• HBUS allows up to 20 readers to be connected to a single cable. Each reader requires at
least 9 Vdc to func on correctly. The cable length and the number of readers connected
will have an impact on the voltage at each reader.
3

Distance between readers

The distance separa ng any two proximity readers must not be less than 200 mm (8 in) in all direc ons.
When moun ng a proximity reader on an internal wall, check that any reader fi xed to the other side of
the wall is not less than 200 mm (8 in) away.
3E4720 Gallagher T12 Reader | Edi on 12 | May 2023
Copyright © Gallagher Group Limited
Cable format*
4 twisted pair each 2 x
2
0.2 mm (24 AWG)
2 twisted pair each 2 x
2
0.2 mm (24 AWG)
2
4 x 0.2 mm Not
twisted pairs (24 AWG)
2
4 x 0.4 mm Not
twisted pairs (21 AWG)
2 Twisted pair each 2
x 0.4 mm 2 (21 AWG,
Data) and 2 x 0.75 mm 2
Not Twisted Pair (~18
AWG, Power)
200 mm
HBUS Cardax IV
single reader single reader
connected connected
using data using data
only in a single only in a single
cable cable***
500 m (1640 ) 200 m (650 )
500 m (1640 ) 200 m (650 )
400 m (1310 ) 200 m (650 )
400 m (1310 ) 200 m (650 )
500 m (1640 ) 200 m (650 )
HBUS/Cardax IV
single reader
connected using
power and
data in a single
cable****
100 m (330 )
100 m (330 )
100 m (330 )
150 m (500 )
450 m (1490 )
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