SH-ARC PCI
Manual
Version 01.00
multivibrator (time constant of approximately 1 msec) and thus, made
visible.
LED, Coax Mode (green):
This LED is activated if the ARCNET controller is configured for a Bit
rate valid for the coax interface (2.5 MBit/s - 10 MBit/s), the controller is
transmitting and in default mode (= non Backplane). When the LED is
inactive, no data are sent via the coax interface. Note: The HIT is
specified only for operation at 2.5 Mbit/s.
LED, Receive (yellow):
This LED indicates activity on the ARCNET receiver channel. The signal
is prolonged with the aid of a digital one-shot multivibrator and thus,
made visible. Because the signal is received again by both the coax
interface and the RS485 interface, the LED is also activated by the
transmitter signal. The LED continuously lights when the ARCNET is in
stable operation. The brightness depends on the Bit rate selected.
During reconfigurations [1] the LED periodically flickers.
LED Transmit (yellow):
This LED indicates activity on the transmitter channel. The signal is
prolonged with the aid of a digital one-shot multivibrator and thus, made
visible. The brightness depends on the Bit rate selected, on the length of
the packets transmitted and on the number of connected ARCNET
nodes.
3.5 Dip Switch Settings
The SH-ARC PCI Adapter is Plug & Play capable and does not provide
the possibility to select address or interrupt manually.
The only item with manually changeable settings is the RS485 interface.
There are four switches which can be accessed from outside.
S3
S4
Function
Comment
ON
ON
Termination for RS485
enabled
Default setting
OFF
OFF
Termination for RS485
disabled
ON
OFF
invalid
OFF
ON
invalid
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