9
3
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
4
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
5
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
6
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
7
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
8
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
……
…………………………………………………………………
254
OFF
ON
ON
ON
ON
ON
ON
ON
255
ON
ON
ON
ON
ON
ON
ON
ON
2.5.4 Terminal Matching Resistance Setup
There is terminal resistance 120Ω on the main board. There are two modes: See Figure 2-13.
Figure 2-13
The factory default setup is shown as in Figure 2-14. Right now, the jumper (Connection board)
is on the pin 2 and pin
3. The 120Ω resistance does not connect to the device.
Figure 2-14
If you want to connect the 120Ω resistance, please remove the jumper from the pin 2 and pin 3
and connect to pin 1 and pin 2. Now t
he 120Ω is connected to the circuit. See Figure 2-15.
Figure 2-15
1-2
2-3
120Ω
ON
OFF
