Moxa Technologies MGate MB3180 Quick Installation Guide

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Adjustable Pull High/Low Resistors for the RS-485 Port
In some critical RS-485 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. Jumpers
JP3 and JP4 are used to set the pull high/low resistor values for the
serial port. To Set the pull high/low resistors to 150 KΩ, which is the
factory default setting, leave the two jumpers open. To set the pull
high/low resistors to 1 KΩ, use the jumper caps to short the two
jumpers.
MGate MB3180 Jumpers

Moxa Technologies MGate MB3180 Specifications

General

Full duplex	Yes
Data transfer rate	0.1 Gbit/s
Ethernet LAN (RJ-45) ports	1
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	0 - 55 °C
Operating relative humidity (H-H)	5 - 95 %
Interface	RS-232/422/485, RJ45
Safety	UL 60950-1, EN 60950-1
Certification	EN 55024, \\r EN 61000-4-2 (ESD) Level 2, \\r EN 61000-4-3 (RS) Level 2, \\r EN 61000-4-4 (EFT) Level 2, \\r EN 61000-4-5 (Surge) Level 2, \\r EN 61000-4-6 (CS) Level 2, \\r EN 61000-4-8, \\r EN 61000-4-11, \\r EN 61000-4-12
LED indicators	Power
Compatible operating systems	Windows 98/ME/NT/2000, Windows XP/2003/Vista/2008/7 x86/x64

Weight and Dimensions

Weight	340 g