TME-104P-CSR-LX800-R1V5.doc Rev 1.5 23 (44)
RS485-Termination Jumpers
Connector type IDC4 pin header 2.00 mm
Use 2 mm jumpers to terminate lines correctly.
There are two jumpers COM1 and COM2, respectively.
The RS485 termination jumpers are located at the top of the printed circuit board, see chapter
150H2.2
When the jumper is set, the differential pairs
are terminated with 120Ω between them.
(e.g. RX+ and RX-)
Additionally, positive/negative receive lines are pulled up/down
with 1kΩ to 5V/GND in order to protect the transceivers of the
Cool SpaceRunner-LX800 from overvoltage.
It is recommended to protect the ports of the external device in
the same way!
Caution: Termination Resistors should not be used in RS232 Mode!
Otherwise, the serial ports will not work.
3.11 Parallel Port LPT1
The parallel port is located on an IDC26 header. An adapter cable with a standard DSUB-25 female
connector is available.
The parallel port is programmable in BIOS.
Entering Motherboard Device Configuration Æ Serial and Parallel Device Configurations,
configuration of LPT1 is accessible.
LPT1 Parameter Possible Settings
Base Address Disabled, 0x378
0x3BC and 0x278 are not recommended, because of a possible
conflict with the PCI to ISA Bridge
Mode Compatible, PS/2 Bi-directional, EPP 1.7, EPP 1.9
IRQ Disabled, IRQ 5, IRQ 7, IRQ 9, IRQ 10, IRQ 11
DMA None, Channel 1, Channel 3
Pin Signal Pin Signal
1 TX+ 2 TX-
3 RX+ 4 RX-
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