CONNECTING THE TERMINATION RESISTOR AND DIODE
Termination Resistor
A resistor is inserted for matching the line’s impedance to prevent distortion and reduction in
Note that termination resistors of lower than 90 are not allowed, neither more than one termination resistor is accepted for the communications system.
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Converter | 120Ω | 120Ω | B | |
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| TX+ | RX+ |
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| TX- | RX- |
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<Termination Resistor in
CONNECTION EXTERNAL AND INSTALLATION
Bypass Diode Connection
If you connected an inductor (door lock or alarm device) to the output relay, there should occur a voltage surge while the inductor was between turning on and turning off. If you do not connect a bypass diode to the relay, the voltage surge will cause damage to the electric circuit of the controller. To reduce this surge, it is recommended to connect a bypass diode to the relay.
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Cathode | Anode |
| DC- | 1N4004 ~ 1n4007 or equiv. | |
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English _ 13