User Manual

Page 12 of 28
Document Reference Phalcon NT, Issue 9 and Date 07/04/2020
THIS IS THE PROPERTY OF PHAROS MARINE AUTOMATIC POWER LIMITED. DISCLOSURE OR REPRODUCTION IS FORBIDDEN
UNLESS AUTHORISED
The Transponder is secured to a platform using three or more bolts (suitable for M10 bolts torqued to a max of 15
Nm), arranged in the pattern given in Appendix A.
As the manufacturer of the equipment, Linwave do not know the specifics of each installation site and so the supply
of the fixing’s and any other parts required are left to the customer’s discretion; however a clear line of sight to
intended radars is necessary for correct operation.
Note: A low impedance (<20mΩ) connection capable of carrying 20A to earth is necessary for the Lightning Ground
Connector (See page 5. Connection E) to meet the surge protection specification.
See Appendix A for mechanical details.
Electrical Connection
The Transponder is intended to operate from a single DC power supply of between +10V and +36V via an Amphenol
connector. The source impedance of the DC supply applied to the Transponder must be less than 1 Ohm.
Information on the fitted connector type and connections to the Transponder can be found in Appendix B and the
Block Diagram above. The alternate mating half of the connector is required for the external power cable (not
supplied).
Correct choice of wire gauge for the cabling is left to the customer but must be sufficient to supply the required 10V
to 36V DC, with a nominal peak current of up to 2A, at the terminals to the device and be appropriate for the
external operating environment. For reference the internal wiring to the main power connector is made up of three
parallel 26AWG wires, each consisting of 7 strands 34AWG tinned copper wire, with a voltage rating of 300V and PVC
Insulation. It may be necessary to consider a larger gauge than this for long cable runs to the transponder device
where the voltage drop across the supply cable may drop the applied voltage below the 10V minimum requirement
for correct operation.
A fuse rated in excess of 2A but less than 3A fitted in series with the positive voltage connection wires is
recommended for additional fault protection purposes and should be used in all battery based applications.
In order to meet conducted emissions requirements of BS EN 60945, through the power cables, the floor of the
transponder must be situated more than 25mm away from a ground plane if other electronic equipment is
connected to the common supply.