RS-485 Reader Connection
The connection of a single RS-485 reader to a reader expander.
Shield wires
connected
at the splice
Reader shield is
not terminated
inside the reader
Shield is frame
grounded at
one point
V+
V-
C
BZ
L2
L1
D1/
D0/
NB
NA
1
2
3
4
5
6
7
8
9
0
X
RED
BLACK
SHIELD
GREEN
WHITE
ORANGE
BROWN
BLUE
YELLOW
VIOLET
Shielded Cable
RS-485 Reader Connection (Entry/Exit)
The connection of two RS-485 readers to a reader expander providing an entry/exit configuration.
Shield wires
connected
at the splice
Reader shield is
not terminated
inside the reader
Shield is frame
grounded at
one point
ENTRY
V+
V-
C
BZ
L2
L1
D1/
D0/
NB
NA
1
2
3
4
5
6
7
8
9
0
X
RED
BLACK
GREEN
WHITE
ORANGE
BROWN
BLUE
YELLOW
VIOLET
RED
BLACK
GREEN
WHITE
ORANGE
BROWN
BLUE
YELLOW
VIOLET
SHIELD
SHIELD
Shielded Cable
Shielded Cable
EXIT
The exit reader has the
green
and
orange
wires connected together.
A 330 ohm EOL (End of Line) resistor
may
be required to be inserted between the NA and NB terminals of the
reader and a second 330 ohm EOL resistor
must
then be inserted between the source NA and NB terminals at the
other end of the wiring.
tSec | tSec Multi-Technology Card Reader with Bluetooth® Technology | Installation Manual
18
