User Manual

4 Part number 3E0054 R2
March 2003
Installation Instructions
1. Considering the recommended mounting height, mark the position where
the IDT is to be mounted.
Note:
It is very important the base of the IDT is flush with, and tight against, the
mounting surface. If you are mounting the IDT on a rough surface, make
the surface as smooth as possible under the IDT and up to 25mm (1 inch)
around the IDT. Failure to do so may mean it could be difficult to remove
the reader at a later date.
2. Drill a 20 mm (
3
/
4
inch) diameter hole for the base extrusion through or into
the mounting surface.
3. Optionally drill the four pilot holes for the fixing screws.
Note:
Six possible mounting points are provided on the base. Ensure the four you
select will mount the IDT securely.
4. Run the building cabling through the base.
5. Fit the base to the 20 mm (
3
/
4
inch) hole and secure it to the mounting
surface using four self-tapper pan head fixing screws (supplied).
6. To comply with the environmental specification, fit the screw caps over
each fixing screw. The screw caps prevent water from entering the Cardax
FT IDT (125 Series) via the fixing holes.
7. Connect the cable assembly to the building cable.
Red = + 12 V DC (nominal)
White = Comms RS485 cable
Blue = Comms RS485 cable
Black = 0 V (GND)
Caution
The Cardax FT System does not require the RS485 cabling to be
polarised but the DC power must be connected to the correct terminals.
8. Ensure the connector is pressed into grommet.
9. Plug the Interconnect PCB onto the connector and ensure it is clipped into
the base.
10. Push the Interconnect PCB / Connector / grommet home into the base.
Firmly clip the Interconnect PCB under the retaining clips in the base.
11. If this Cardax FT IDT (125 Series) is the last unit on this RS485 cable,
connect the supplied jumper across the "RS485 Termination" link on the
main board in the bottom right corner. (Refer to "Component layout" next.)
12. Set the unit address of the IDT as detailed later in this Installation Note.