Model FT2 101364
3.2.4. RS485 Wiring
W1 jumper is to terminate the bus with a 121ohm resistor and should only be installed on the last
instrument of the daisy chain. W3 and W4 are used for half duplex operation. (W3 connects TX+ &
RX+, W4 connects TX- & RX-).
Figure 3-5 RS485 Wiring and Configuration
Page 20 Fox Thermal Instruments, Inc., 399 Reservation Road, Marina, CA 93933
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