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| Categories: | Signal Conditioners |
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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 k, 10 k, 100 k, Switch-selectable |
| Termination Resistance | 15 Steps, 65 ~ 560 |
| 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 |
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Data Sheet
2D DWG Drawing
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