Honeywell XYR 5000 LINE User Manual

 

software may require the use of an RS-485 to RS-232 converter, as most PCs cannot be 
wired directly to RS-485. 

To wire the RS-485 cable to the Base Radio we recommend using a 22AWG twisted pair 
shielded wire. Place one of the twisted pair wires in the “A” (Tx+/Rx+) slot of the same 
terminal block as the power supply wires, and the other wire in the “B” (Tx-/RX-) slot of 
the terminal block as shown below in Figure 3-5. 

 

RS-485 may be wired in-line (in series) to multiple Base Radios. This is called “daisy-
chaining”. Only Base Radios using Modbus RS-485 output can be daisy-chained. See 
Section 3.2.6. Note that Base Radios daisy-chained must be set to different RF Channels 
to communicate properly on the same wire. 

Honeywell offers an optically isolated, surge protected, DIN Rail mountable RS-485/232 
converter, AIC #. Because there are many RS-485/232 Converters available, please see 
your converter’s instruction manual for details as this section will only discuss the wiring 
of the B&B 485LDRC9 converter. 

The Base Radio communicates via a RS-485 half-duplex differential signal with A being 
Tx+/Rx+ and B being Tx-/Rx-. To properly wire the Base Radio to the 485LDRC9, you 
should follow Figure 3-6. 

B a s e   R a d io

4 8 5 L D R C 9  

C o n v e rte r

(T D B )

(T D A )

 

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