L6L
2. Assembly
18
L6L
The RS485/232 interface transmission type can be
switched over (factory-set status: RS485).
RS485 – ST507 (SubBus)
RS232 – ST508 (for servicing work, if applicable)
If the L6L is the first or the last bus subscriber, the bus
connection resistor must be connected.
To do this, move the two-pole slider switch SW602 to “ON”.
(Factory-set status: switched on).
Communication with the sub-devices is facilitated via the
RS485 interface.
Up to 31 RS485 sub-devices, including a maximum of 16
readers can be connected.
Please note here that the total power consumption of the
sub-terminals does not exceed the output of the terminal or
external power pack.
RS232
RS485
SW601
Interface changeover switch
OFF
ON
12
SW602
RS485 terminating resistors
3. Connection variants
3.5 RS485/RS232 interface as sub-bus interface
RS485: For old devices (e.g. VTxx, M6-Box, M6I,
M6T, L6I) the pin configuration is inverted.
For an exchange the connection must occur in
reverse. (A to B(-) and B to A(+))
ST508
RX
TX
GND
RS232
ST507
B(-)
A(+)
RS485
