User Manual

UM0001-1B.00 June 17, 2002
User Manual for the CTS Tri-Reader 1-3
CSC Type A: Reader-to-card, ASK 100% modified miller, 106 kbit/s. Card-to-
reader, ASK - Manchester, load modulation - subcarrier fc/16,
847.5 kHz,106 kbit/s.
CSC Type B: Reader-to-card, ASK 10% modulation index NRZ, 106 kbit/s.
Card-to-reader, BPSK-NRZ load modulation subcarrier fc/16,
847.5 kHz, 106 kbit/s.
Type GO CARD: Reader-to-card, ASK 8% modulation index NRZ, 115.2 kbit/s.
Card-to-reader, ASK-NRZ load modulation, 115.2 kbit/s.
1.5 Tri-Reader Printed Circuit Board Size
The Tri-Reader is a 86.5 CPU x 86.5 CPU circular board. Thickness, including
components and antenna, is 18 mm, except for the RJ45 connector which extends 10 mm
above the components on the back of the board, giving a maximum thickness of 28 mm.
1.6 Tri-Reader Physical Interfaces
The following physical interfaces apply to the Tri-Reader:
1. The Tri-Reader is powered from 8 to 28 Vdc. It can draw a maximum current
of 1.5A (at startup) and dissipates up to 5 Watts. This can be supplied either
via an external power connector (J11) or it can be tapped from the CPU, in
which case it will come in on the RJ45 serial comms connector (see the pinouts
below).
2. The Tri-Reader comms can be set to be either RS232 or RS422/485 levels.
RS232 mode is selected by soldering a 0 ohm resistor into the R35 location.
Leaving R35 unpopulated selects RS422/485.
3. The 3-bit multi-drop unit ID (Unit_ID) of a Tri-Reader needs to be set if more
than one Tri-Reader is to be multi-dropped to a single host computer. If it is
unconnected, the unit ID defaults to 001b. Multi-dropping is only possible if
RS485 is used. There are pull-up resistors on the Unit_ID lines, so only zeroes
have to be driven/tied to a CMOS logic low level.
4. If the user desires to operate the Tri-Reader interface at 115,200 bps, the
Unit_ID currently has to be set to 000b. Otherwise, the baud rate will be fixed
at 921,600 bps.