User's Manual

Page 3
Gallagher T20 Reader
Installaon Note
Document Code: 3E3140
Edion 3, April 2013
Cable type Cable format*
Single reader
connected
using data only
in a single cable
Single reader
connected using
power and data
in a single cable
CAT 5e or beer 4 twisted pair
Each 2 x 0.2 mm
2
(24 AWG)
200 m (650 ) 100 m (330 )
BELDEN 9842
(shielded)
2 twisted pair
Each 2 x 0.2 mm
2
(24 AWG)
200 m (650 ) 100 m (330 )
SEC472 4 x 0.2 mm
2
Not twisted pairs (24 AWG)
200 m (650 ) 100 m (330 )
SEC4142 4 x 0.4 mm
2
Not twisted pairs (21 AWG)
200 m (650 ) 150 m (500 )
* The matching of wire sizes to equivalent wire gauges are only approximate.
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.
Distance between Proximity Readers
The distance separang any two proximity readers must not be less than 200 mm
(8 inches) in all direcons.
200 mm
When mounng a proximity reader on an internal wall, check that any reader xed
to the other side of the wall is not less than 200 mm (8 inches) away.
200 mm