Moxa Technologies UPORT 1130 User Manual

UPort 1100 Series Introduction
1-6
Adjustable Pull High/low, Terminator 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.
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.
SW
1 2 3
Pull High Pull Low Terminator
ON 1KΩ 1KΩ 120 Ω
OFF
150 KΩ
150 KΩ
Disable

Moxa Technologies UPORT 1130 Specifications

General

Connector 1	USB
Connector 2	DB-9M
Connector 1 gender	Male
Depth (imperial)	2.36 \
Width (imperial)	1.51 \
Height (imperial)	0.79 \
Weight (imperial)	0.14 lbs
Dimensions (WxDxH)	38.4 x 60 x 20 mm
Product color	Silver
Data transfer rate	0.012 Gbit/s
Compatible operating systems	Windows 98, ME, 2000, XP (x86/x64), 2003 (x86/x64), Vista (x86/x64) WinCE 5.0 Linux 2.6 (x86/x64), Linux 2.4 (x86/x64)
Input voltage	5 V

Weight and Dimensions

Weight	65 g