SG-785 Hardware User Guide
Ver. 1.0
Last Modified 10/26/2009
Introduction
The SG-785 is an optional module that is used to improve the communication
of RS-485 network. It provides switch selectable pull-high and pull-low
resistors on RS-485 network. It also has 15-step switch selectable termination
resistor such that the user can select a proper termination resistor to be
connected to the RS-485 network easily.
Specifications
General
Interface
RS-485
Pull-high/pull-low Resistance 1k
Ω
Termination Resistance
15 steps, 65 ~ 560
Ω
LED Display
1 red LED as power indicator
1 green LED as termination indicator
Power
Input Range
10 ~ 30 V
DC
Power Consumption
0.5W, 24 V
DC
Environment
Operating Temperature
-25 °C ~ +75 °C
Storage Temperature
-40 °C ~ +80 °C
Humidity
5 ~ 95 % RH, non-condensing
