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Figure 3-6. Headers J1A and J2A, which control line termination.
Table 3-1. Jumper Operation
Function
Adds or removes the 1K-ohm pull-down resistor in the
RS-422/RS-485 receiver circuit (Receive data only).
Adds or removes the 120-ohm termination.
Connects the TX+ to RX+ for RS-485 two-wire operation.
Connects the TX- to RX- for RS-485 two-wire operation.
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CHAPTER 3: Card Setup
13
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