User`s manual

BL160052 s System Development

Add termination and

bias resistors on the

master controller only

BL1600

Add a termination

resistor on the

end controller

No termination or

bias resistors on

other controllers

RS-485 Network Hardware Connections

Figure 4-10 and Figure 4-11 show the connections for a two-wire RS-485

network. Remove RP2, shown in Figure 4-12, from all BL1600 controllers

in the network, except the BL1600 that is the master controller. RP2

contains the bias and termination resistors. Add a 220 Ω termination

resistor to the end BL1600 as shown in Figure 4-12.

Figure 4-10. RS-485 Multidrop Network