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SG-785 Hardware User Guide
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.
General
Interface
Pull-high/pull-low Resistance 1k
Termination Resistance
LED Display
Power
Input Range
Power Consumption
Environment
Operating Temperature
Storage Temperature
Humidity
Introduction
Specifications
RS-485
15 steps, 65 ~ 560
1 red LED as power indicator
1 green LED as termination indicator
10 ~ 30 V
DC
0.5W, 24 V
DC
-25 ° C ~ +75 ° C
-40 ° C ~ +80 ° C
5 ~ 95 % RH, non-condensing
Last Modified 10/26/2009
Ver. 1.0
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Summary of Contents for ICP DAS USA SG-785
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Page 1: Specifications
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. - Page 2 SG-785 Pin Assignment LED Display Power LED, Red Termination Resistor LED, Green Switches Termination Resistor Setting Termination Resistance and Pull-high/Pull-low Setting Terminal Block (Y)DATA+, (G)DATA- RS-485 Data Line (R)+Vs, (B)GND Power Line F. G. Frame Ground...
- Page 3 SG-785 Switch Setting RS-485 Termination Resistance Setting Termination Resistance (ohm) RS-485 pull-high and pull-low setting SW5 SW6 RS-485 Data Line Status No pull-high/pull-low to RS-485 data line Add a pull high resistor to DATA+ line Add a pull low resistor to DATA- line...