CN-0416

Circuit Note

Rev. 0 | Page 8 of 9

Multinode Network Test Setup and Functional Block

Diagram

Figure 8 shows a multinode network setup using both isolated

and nonisolated RS-485 transceivers with two different slave

nodes interfaced by the EVAL-ADICUP3029. Set up the on-

board switches of each EVAL-CN0416-ARDZ board as

indicated in Figure 8. Set the hexadecimal selection switch of

each board to unique address values.

To setup the network shown in Figure 8, take the following

steps:

1. Connect the P11 10-pin connector of the master node to

the ADALM-UARTJTAG.

2. Connect the EVAL-CN0416-ARDZ boards in the indicated

ports (shown in Figure 8) using straight-through Ethernet

cables.

3. Connect the ADALM-UARTJTAG to the PC using the

USB-to-microUSB cable.

4. Identify the correct virtual COM port used by the

ADALM-UARTJTAG.

5. Open the serial terminal software to connect to the serial

port with the baud rate defined by the wiki user guide.

6. Select a slave node to communicate by sending its

hexadecimal address (0 to 9 and A to F).

7. Any lowercase letters sent by the master are encrypted by

the slave node using a Caesar cipher and sent back to the

master, simultaneously.

Figure 8. Combination of Isolated and Nonisolated Full-Duplex RS-485 Connection Diagram for Multinode Networks

P24

S2 = NON-ISO

S4 = FULL

S5 = FULL

S6 = OPEN

S7 = OPEN

GROUND A

P6

P4

P5

P11

SLAVE NODE

WITH OPEN TERMINATION

END SLAVE NODE

WITH TERMINATION

P24

S2 = ISO

S4 = FULL

S5 = FULL

S6 = OPEN

S7 = OPEN

GROUND A

GROUND B

STRAIGHT-THROUGH

CAT5 CABLE

STRAIGHT-THROUGH

CAT5 CABLE

P6

P4

P5

P11

P24

S2 = ISO

S4 = FULL

S5 = FULL

S6 = TERM

S7 = TERM

GROUND A

GROUND C

P6

P4

P5

P11

MASTER NODE

WITH TERMINATION

ADALM-UARTJTAG

USB