ETV 1991
CONTROL PANEL
Page 18
21.06.2018
CAN Bus Termination
In a CAN bus system, both end modules must be terminated. This is necessary to avoid
transmission errors caused by reflections in the line.
Module 1
Module 2
Module 3
Module n
I.e. CPU
DCP 160
I.e. Terminal
ET 081
CAN bus condition
CAN-Bus
termination on the
terminal module
DSUB-plug
with termination
switch
I.e. Terminal
ET 805
If the terminal is an end module, it can be terminated by placing a 150-Ohm resistor be-
tween CAN-A (Low) and CAN-B (High).
USB Interface Connections
The terminal has two USB interface connections that can used to connect various USB
devices (keyboard, mouse, storage media, hubs, etc.) in LASAL. Several USB devices,
which are fully functional in LASAL, can be connected using a hub.
The following restriction applies to the BIOS setup:
The BIOS setup can only be operated when the USB keyboard is connected directly to the
USB socket. Using a USB hub can cause errors in the BIOS setup!
It should be noted that many of the USB devices on the market do not comply with USB
specifications; this can lead to device malfunctions. It is also possible that these devices
will not be detected at the USB port or function correctly. Therefore, it is recommended that
every USB stick be tested before actual use.
a
