Datasheet

AF5485 User Manual
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Figure 5 RS485 typical applications
5 Slave address
Based on ModBus RTU protocol -, device address is the only, according to the PCB board
after eight dial the code switch (Figure 6) to set selection need to address, eight allows a maximum
of 255 devices (address received from 1 ~ 255) in the system.
Figure 6
Calculation method: dial the code A - H respectively corresponding to the number 128, 64,
32, 16, 8, 4, 2, 1 (figure 6). Put A - H address code dialing to NO part code corresponding to the
value add up, and is the address code values. Address code examples as shown in figure 6, 7, 8.
Figure 6 Figure 7 Figure 8
Figure 6: address = 1 H to ON, H 1, namely the address code is 1
Figure 7: address = 2 G to ON, G is 2, namely the address code of 2
Figure 8: address = 13 E, F, H and ON, the address is: 8 + 4 + 1 = 13 namely address code is 13
Note: when choosing measuring range jumper before operation, please close the transmitter power.