Moxa-technologies Moxa Smartio C168H Manual de usuario descargar pdf (Pagina 62)

5-10 Smartio C168H/PCI User’s Manual

RS-485 Cable Wiring for Opt8J

One RS-485 connection box designed for Smartio C168H/PCI is:

Opt8J: Connection box with 8 female RS-422/485 DB25 ports. Set the port switch

to ON position.

The Opt8J supports only 2-wire half-duplex RS-485 communication. Data+/-

pins are served for both data transmitting and receiving, depending on the RTS

signal.

RS-485 Pinouts for Opt8J:

Opt8J

3 Data+(B)

7 GND

16 Data-(A)

Multidrop RS-485 Half-duplex Point-to-Point RS-485 Half-duplex

Opt8J RS-485 Device 1 Opt8J RS-485 Device

Master Slave 3 Data+(B) Data+(B)

3 Data+(B) Data+(B) 16 Data–(A) Data–(A)

16 Data–(A) Data–(A) 7 GND GND

7 GND GND

RS-485 Device N

Slave

Data+(B)

Data–(A)

GND

3 Data+ (B)

7 GND

Data- (A) 16

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 73 74

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Moxa-technologies Moxa Smartio C168H Manual de usuario Pagina 62