Distance Between Proximity Readers - Gallagher T20 Installation Note

Installation Note
Cable type
CAT 5e or better
BELDEN 9842
(shielded)
SEC472
SEC4142
* 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, operating distances and performance may be
reduced depending on the cable quality.

Distance between Proximity Readers

The distance separating any two proximity readers must not be less than 200 mm
(8 inches) in all directions.
When mounting a proximity reader on an internal wall, check that any reader fixed
to the other side of the wall is not less than 200 mm (8 inches) away.
Document Code: 3E3140
Edition 3, April 2013
Cable format*
4 twisted pair
Each 2 x 0.2 mm (24 AWG)
2
2 twisted pair
Each 2 x 0.2 mm (24 AWG)
2
4 x 0.2 mm
2
Not twisted pairs (24 AWG)
4 x 0.4 mm
2
Not twisted pairs (21 AWG)
200 mm
Gallagher T20 Reader
Single reader Single reader
connected connected using
using data only power and data
in a single cable in a single cable
200 m (650 ft) 100 m (330 ft)
200 m (650 ft) 100 m (330 ft)
200 m (650 ft) 100 m (330 ft)
200 m (650 ft) 150 m (500 ft)
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