AML Guardian Vehicle-Mounted Computer - Manual (Page 8)

AML
V 1.0.0
800.648.4452
www.amltd.com
COM Ports on Pigtail Cable
 COM1(RS232 DB9 male)-----Standard configuration is RS232. Debug port(hardware signal:
Pin 2---TXD, Pin 3---RXD, Pin 5---GND) can be for service port.
 COM2(RS422/RS485 DB 9male)----------Standard is RS422(hardware signal: Pin 1---TX+, Pin 2---
TX-, Pin 3---RX+, Pin 4---RX-, Pin 5---GND), optional is RS485(hardware signal: Pin 1---RX485+,
Pin 2---RX485-, Pin 5---GND).
 422 interface
o [DllImport("Wrapper.dll")]
public static extern int Zed422();
Set com2 422 mode. In this mode com2 is set 422 mode. COM2 can read and
write.
 485 interface
//485 422
o
[DllImport("Wrapper.dll")]
public static extern bool ZedInit();
This function can only load once.
o [DllImport("Wrapper.dll")]
public static extern int Zed485RX();
Set com2 485 Rx mode. In this mode com2 can only read.
o [DllImport("Wrapper.dll")]
public static extern int Zed485STX();
Set com2 485 TX mode. In this mode com2 can only write.
 COM3 (RS232 DB9 male)-----Standard is service port(hardware signal: Pin 2---TXD, Pin 3---
RXD, Pin 5---GND, Pin 6---5V, Pin 9---GND).
 COM4(RS232 DB9 male)-----Standard is service port(hardware signal: Pin 2---TXD, Pin 3---
RXD, Pin 5---GND).