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Module ổn định đường truyền RS-485 ICP DAS tM-SG4 CR

The RS-485 Pull-high/Pull-low and Termination Resistors Module

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Model: tM-SG4 CR
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Module ổn định đường truyền RS-485 ICP DAS tM-SG4 CR

The tM-SG4 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. If the RS-485 network is not over 100 meters, the termination resistors are not needed. Otherwise, it may be necessary to insert two termination resistors at both end of the RS-485 network. It is not easy to calculate the value of a termination resistor on the RS-485 network. The best way to do this is to use an oscilloscope to check the RS-485 signal directly. If the impedance match of RS-485 network is OK, the oscilloscope will show a very nice square wave. If these square wave signals are distorted, the user will need to insert two termination resistors at both end of the RS-485 network.

LED Indicators
Status 1 Red LED as Power Indicator
1 Green LED as Termination Indicator
Misc.
Pull-high/Pull-low Resistors 1 kΩ, 10 kΩ, 100 kΩ, Switch-selectable
Termination Resistance 15 Steps, 65 ~ 560 Ω
Power
Reverse Polarity Protection Yes
Consumption 0.5 W Max.
Environment
Operating Temperature -25 °C ~ +75 °C
Storage Temperature -40 ~ +85 °C
Humidity 10 ~ 90% RH, Non-condensing
tM-SG4 CR RS-485 Pull-high/Pull-low and Termination Resistor Module (RoHS)
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