User's Manual

RS232-Transponder Reader
(SECS1-Protocol), Release 0.3 Draft Page 22 of 91
2000-09-29
ID: ID000093
3.8 Power Supply and Current Input
Description min Type max unit
Voltage (proof against connecting to
the wrong terminal)
18 24 30 VDC
Current with/without presence sensor
(starting process excluded)
30 / 55 mA
Reading/writing impulse
rod antenna without/with presence
sensor
micro antenna without/with presence
sensor
160 / 185
140 / 165
mA
mA
3.9 External Output (LED)
Normally a LED is connected to the external output which is only relevant combined
with a read triggered by the external input.
The LED lights as long as a page is automatically read from a transponder.
If several pages are read in succession, the LED pulses because an
acknowledgement of the terminal has to follow each page.
If the terminal does not return any acknowledgement after a page of the automatic
read, the LED blinks as long as either a read process initialized again had been
completed successfully or a reset had been triggered.
If the reader cannot identify any transponder during the automatic read, the LED
lights permanently. This state can be reset by a reset or by a faultless automatic
reading cycle.
3.10 Additional Instruction for Use
Never expose the device to a intense change in temperature. Otherwise, water of
condensation can develop inside the device what can lead to damages.
Never bend or extend the antenna cable or expose it to other mechanical loads.