User Manual

Elatec GmbH
Page 3 of 8
2. Getting Started
2.1 Operating mode
In order to start operating a TWN4 Slim, it simply has to be connected
directly to a host device.
2.2 Power Supply
Requirement for the external power supply unit:
- Limited Power Source according to IEC60950-1 or Limited Power
Source according to IEC60950-1 or
- PS2 classified IEC62368-1
- Short-circuit current < 8A
2.3 Enumeration
Once the device has been powered up, it is waiting for completion of the
enumeration by the USB host. As long as the device is not enumerated, it
is entering a minimum power consumption mode.
2.4 Initialization
After powering up and enumeration the device is turning on the built-in
transponder reader logic. The green LED is turned on permanently. Some
transponder reader modules need some kind of initialization, which is
performed in this step. After successful initialization, the device sounds a
short sequence, which consists of a lower tone followed by a higher tone.