Moxa UPort 1410 [17/50] Adjustable pull high low resistors for the rs 485 port

UPort 1200/1400/1600 Series Driver Installation

2-5

Connecting to a Serial Device

Use the proper serial cables to connect your serial devices to the UPort’s serial ports, which support the RS-232

and/or RS-422/485 interface. The UPort’s serial ports use DB9 male connector with standard pin assignment.

Please see Chapter 3 for detail pin assignment.

LED Indicators

UPort 1250/1250I

There are five LEDs per port for indicating the status of the ports. The LEDs are listed under P1 and P2.

LED Name LED Color LED Function

Active

Red Power is on

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

TxD/RxD

Orange Port is receiving data from attached device

Green Port is transmitting data to attached device

Off No data is being transmitted or received

UPort 1400/1600

There are five LEDs per port for indicating the status of the ports. The LEDs are listed under P1, P2, P3, etc.

LED Name LED Color LED Function

Active Green Power is on

Off

Power is off, or power error condition exists

Tx/Rx Orange Port is receiving data from attached device

Green Port is transmitting data to attached device

Off No data is being transmitted or received

Adjustable Pull High/low Resistors for the RS-485 Port

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.

To set the pull high/low resistors to 1 KΩ, make sure both of the assigned DIP switches are in the ON

position. This is the default setting.

1 2

Pull High Pull Low

ON 1 KΩ 1 KΩ

OFF 150 KΩ 150 KΩ