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3E4720 Gallagher T12 Reader | Edion 12 | May 2023
Copyright © Gallagher Group Limited
2 Before you begin
2.1 Shipment contents
Check the shipment contains the following items:
• 1 x Gallagher T12 Reader facia assembly
• 1 x Gallagher T12 Reader bezel
• 1 x M3 Torx Post Security screw
• 2 x M3.5 Phillips drive fixing screws
• 4 x 25 mm No.6 self tapping, pan head, Phillips drive fixing screws
• 4 x 40 mm No.6 self tapping, pan head, Phillips drive fixing screws
2.2 Power supply
The Gallagher T12 Reader is designed to operate at a supply voltage of 13.6Vdc measured at the
reader terminals. The operang current draw is dependant on the supply voltage at the reader.
For a MIFARE reader, at 13.6 Vdc the current draw is 50 mA (idle). During credenal read, beeper
and LED acvity, the current will momentarily reach 77 mA (maximum). For a MulTech reader,
at 13.6 Vdc the current draw is 80 mA (idle) and will momentarily reach 142 mA (maximum). The
power source should be linear or a good quality switched-mode power supply. The performance
of the reader may be affected by a low quality, noisy power supply.
2.3 Cabling
The Gallagher T12 Reader requires a minimum cable size of 4 core 24 AWG (0.2 mm2) stranded
security cable. This cable allows the transmission of data (2 wires) and power (2 wires). When
using a single cable to carry both power supply and data, both the power supply voltage drop
and data requirements must be considered. For good engineering design it is recommended that
the voltage at the reader should be approximately 12 Vdc.
HBUS cabling topology
The HBUS communicaons protocol is based on the RS485 standard and allows the reader to
communicate over a distance of up to 500 m (1640 ).
The cabling between HBUS devices should be done in a "daisy chain" topology, (i.e. A "T" or
"Star" topology should not be used between devices). Should "Star" or "Home-Run" wiring be
required, the HBUS 4H/8H Modules and the HBUS Door Module allow mulple HBUS devices to
be individually wired to the one physical locaon.
The end devices on the HBUS cable should be terminated using 120 ohms resistance. To
terminate the Gallagher Controller 6000, connect the supplied on-board terminaon jumpers
to the Controller. To terminate a reader, connect the orange (terminaon) wire to the green
(HBUS A) wire. Terminaon is already included at the HBUS Module, (i.e. each HBUS port is
permanently terminated at the module).
