Magtek tDynamo, Installation And Operation Manual

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3 - Operation
tDynamo| Three-way Secure Card Reader Authenticator | Installation and Operation Manual
Page 29 of 39 ( D998200257-20 )
3.4 Power Management
3.4.1 About Power
tDynamo can be powered by one of two power sources: USB or the built-in rechargeable battery.
When the device is connected to a USB host or charger via the USB-C connector or the optional docking
stand, it receives power through the USB connection. In this case, the device powers on automatically,
recharges the built-in rechargeable battery, and stays powered on.
When the device is not connected to a USB power source, it receives power from its onboard
rechargeable battery. In this case, after a period of inactivity (no host commands and no user interaction),
the device transitions to a low-power Sleep Mode, which it indicates by turning the General Status LED
solid red and LED 3 solid green. When the device is already in Sleep Mode, after a further period of
inactivity, the device powers off completely and turns off all LEDs.
The host can set the device’s Sleep Mode and Power Off timeouts to values that are appropriate for the
specific solution design. For details about developing host software to configure the device, see section
5
Developing Custom Software .
For details about the device’s behavior in its various power modes, see section
3.1 About Operating
Modes . For instructions to check and recharge the battery, power the device on and off, and wake the
device from sleep mode, see the following sections.
3.4.2 How to Check Battery Level
To check the battery charge level, make sure the device is powered on and awake, then briefly tap the
pushbutton. The Status LEDs light to show the battery level as follows:

One LED = Battery level is under 50%

Two LEDs = Battery level is between 50% and 70%

Three LEDs = Battery level is between 70% and 90%

Four LEDs = Battery level is above 90%
Figure 3-1 - Status LEDs Showing Battery Level