Moxa Technologies UPORT 1600 - Manual (Page 14)

UPort 1200/1400/1600 Series User’s Manual Driver Installation
2-5
If the power is properly supplied, the Active LED will glow a solid green.
Buzzer (UPort 1400 and 1600 only)
UPort will sound the buzzer twice when the power is turned on. You will also hear the buzzer
when using the Locate function on the driver property page.
Connecting to a Serial Device
Connect the serial cable between UPort 1200/1400/1600 and the serial device. UPort
1200/1400/1600’s serial ports use the RS-232 or RS-422/485 interface to transmit data. The port
uses a standard male DB9 pin assignment.
LED Indicators
UPort 1250/1250I
There are five LEDs to indicate status for each port, listed under P1 and P2.
LED Name LED Color LED Function
Red Power is on
Active
Off Power is off, or power error condition exists
RS-232 Red Port is configured for RS-232 operation
RS-422 Red Port is configured for RS-422 operation
4W RS-485 Red Port is configured for 4-wire RS-485 operation
2W RS-485 Red Port is configured for 2-wire RS-485 operation
Orange Port is receiving data from attached device
Green Port is transmitting data to attached device TxD/RxD
Off No data is being transmitted or received
UPort 1400/1600
LED Name LED Color LED Function
Green Power is on
Active
Off Power is off, or power error condition exists
Orange Port is receiving data from attached device
Green Port is transmitting data to attached device Tx/Rx
Off No data is being transmitted or received
Adjustable Pull High/low Resistors for the RS-485 Port
In some critical environments, you may need to add termination resistors to prevent the reflection
of serial signals. When using termination resistors, it is important to set the pull high/low resistors
correctly so that the electrical signal is not corrupted. The UPort uses DIP switches to set the pull
high/low resistor values for each serial port.
To set the pull high/low resistors to 150 KΩ, make sure both of the assigned DIP switches are in
the OFF position. This is the default setting.
To set the pull high/low resistors to 1 KΩ, make sure both of the assigned DIP switches are in
the ON position.
ATTENTION
Do not use the 1 K
Ω setting on the UPort when using the RS-232 interface. Doing so will
degrade the RS-232 signals and shorten the maximum allowed communication distance.