
11
Chapter 2
2.4.2 Enable Mode
You could set the Enable mode by using DIP switches (S10). If the
switches are set to "Off", the driver automatically senses the direction of
the data flow and switches the direction of transmission. No handshaking
is necessary. If DIP switches are set to "On," the driver is always enabled,
and always in high or low status. Please must select a mode before begin-
ning RS-422 applications.
Default Setting is “Off”
2.4.3 Terminal Resistor
You can install terminator resistors if necessary to match impedance.
Each signal line (Tx+/Tx-/Rx+/Rx-/Data+/Data-). Especially in fields
with electric noise, installing terminal resistors is helpful to stabilize com-
munications. Make sure that both sides of the RS-422 or RS-485 commu-
nication ports are installed on BUS.
You could install jumpers on JP8 and JP10 to enable terminal resistor
(120Ohms) for RS-422 or RS-485 of COM3 and COM4. The detail
jumper setting shows as following figure.
Figure 2.3: COM3& 4 Terminal Resistors (JP8& 10)
Switch position
Description
On
RS-422 master
Off
RS-422 slave or
RS-485 Automatic Direction Control
Содержание UNO-1019
Страница 1: ...UNO 1019 PXA 200MHZ 64MBRAM 2xLAN 4xCOM Universal Network Controller User Manual...
Страница 14: ...UNO 1019 User Manual 6 Figure 1 3 UNO 1019 Front View Dimensions Figure 1 4 UNO 1019 Bottom View Dimensions...
Страница 23: ...15 Chapter 2 Figure 2 6 Digital Input Connection Dry Contact Figure 2 7 Digital Input Connection Wet Contact...
Страница 26: ...UNO 1019 User Manual 18 Then screw the whole device to the wall Figure 2 10 Attach UNO 1019 to the Wall...
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Страница 52: ...UNO 1019 User Manual 44 3 Setup the device according to the specification of the modem and press Next...
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Страница 64: ...UNO 1019 User Manual 56 8 Select UNO 1019 in the main window of Visual C...
Страница 94: ...UNO 1019 User Manual 86 Logs Use Logs section to control what information about the FTP transactions is logged...