Advantech PCL-740 Uživatelský manuál stáhnout pdf (Strana 31)

21 Chapter 2

If a jumper is set to "ON," the driver is always enabled, and always in

high or low status. The user must select a mode before beginning RS-422

applications.

Figure 2.15: Enable Mode Selection for PCL-743B/S, PCL-745B/S and

PCL-846A/B

PCL-746+

Should you wish to configure the PCL-746+ to operate in the RS-232

mode, then the upper two pins of the 12*3 pin jumper should be con-

nected. For RS-422/ RS-485 mode selection, the bottom two pins of the

12*3 pin jumper should be connected as shown below.

Figure 2.16: RS-232/422/485 Mode selection for PCL-746+

For either RS-422 or RS-485 mode selection the 1*3 pin jumpers for each

port have to be configured. For RS-422 configuration the upper two pins

of the 3-pin jumper should be connected. A 2-pin jumper is used for Tx

control. Closing the jumper initiates Tx automatic flow control. An open

jumper means that Tx is always on. For RS-485 configuration the bottom

two pins of the 3-pin jumper should be connected and the 2-pin jumper is

always closed as shown below.

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 79 80

Žádné komentáře

Advantech PCL-740 Uživatelský manuál Strana 31