Table of Contents
Advertisement
LNL-8000 Star Multiplexer
90.2
The Star Multiplexer Board
The Star Multiplexer board contains the following components: one (1) power input, one (1) host
communication RS-232/RS-485 input, eight (8) RS-485 (2-wire) Star Legs or four (4) RS-485 (4-wire), one
(1) communication speed DIP Switch four-position selector and seventeen (17) jumpers.
T R +
T XD
T R -
RXD
GND
+ D
C
NC
GND
90.2.1
Status LEDs
There are ten (10) status LEDs on the Star Multiplexer.
LED
PURPOSE
A
This LED is the heartbeat of the circuit board. In its powered-up normal condition,
the LED will blink rapidly. If there is no power, the LED will be off.
1
This LED indicates data coming from the upstream or host port. When data is being
sent to the Star Multiplexer, this light will blink rapidly.
2-9
These LEDs indicate data coming from downstream devices. When data is being sent
from a downstream device to a Star Multiplexer port, the corresponding LED will
blink rapidly.
454 —
revision 7
Star Multiplexer Board
JP2
JP 7
JP 5
T B2
T B1
A
1
2
6.00 ( 152)
JP1 1
JP1 2
JP1 4
JP4
JP3
JP8
JP1 0
JP9
JP1 3
JP 16
JP1 5
JP1 7
3
4
5
6
7
8
9
5.50 (140)
TR+
TR-
GND
TR+
TR-
GND
TR+
TR-
GND
TR+
TR-
GND
TR+
TR-
GND
TR+
TR-
GND
TR+
TR-
GND
TR+
TR-
GND
Advertisement
Table of Contents
