Decision Computer International UHR-32, Руководство пользователя

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Schematic
Contact protection circuits
When a reed relay is used with an electromagnetic relay or solenoid, the energy stored will cause an inverse voltage when the
reed contacts break. The voltage, although dependent on the inductance value, sometimes reaches as high as several hundred
volts and becomes a major factor to deteriorate the contacts.
• DC: Protection circuit with a diode
• DC and AC: Protection circuit with Varistor or RC-element
The suppressor must be made to the load.
Relay-Out
Contact protection circuits
1.The LED1 is an indicator to show the power is supplied normally.
2. The LED2 is an indicator to warning the USB link status. When it lights, it
means USB connection works normally, otherwise it is fail.
LED