Schneeberger MINISCALE PLUS Manual page 22

6
Output Signals and Supply
LED Supply missing
red Red LED does not light up
green Green LED does not light up
1-axis USB Counter 026
3-axis USB Counter 046
USB counter 026
Digital TTL input
USB counter 046
Digital TTL input
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If the carriage is on the guideway and the LED lights up red despite the flexible
printed circuit board being inserted, the error should be found using the table in
chapter 10 ‚Error Description'.
Supply connected, normal operation
Red LED does not light up
Green LED lights up green
The status of the interface module is shown electronically with the output («ERR
NOT»). ERR NOT is a 5-volt output (TTL level), where a «low - signal» = «pending
error» and a «high - signal» = «no error».
6.3.5 Using the digital interface module with the USB counter 026 or 046
(for technical information, see chapter 12 in the MINI-X product
catalogue).
The USB counters mentioned above allow MINISCALE PLUS to be connected
directly to a computer via USB.
Current consumption:
< 150 mA
Storage temperature of the USB counter:
-30 °C to + 70 °C
Operating temperature of the USB counter:
0° to 45 °C in relative humidity of <75%.
Digital signal input to the USB counter must be used in order to make use of the
full resolution of the interface module. The USB counter has a maximum permissi-
ble input frequency of 500 kHz, or 1MHz for the 046 counter (frequency based on
one channel, e.g. the A signal).
Consequently, a count rate around 4 times higher occurs during 4-edge evaluation.
This limits the travelling speed to 0.2 or 0.4 m/s for a resolution of 0.1 µm (refer to
the following table):
Interpolation Resolution
(4-edge evaluation) 0.1 μm
Interpolation Resolution
(4-edge evaluation) 0.1 μm
The maximum length for the USB cable is 5 meters. With a USB repeater cable,
the USB connection can be extended up to a maximum of 25 m.
Error condition
Red LED lights up red
Green LED lights up green
Input frequency
500 kHz
Input frequency
1 MHz
Speed
Max. 0.2 m/s
Speed
Max. 0.4 m/s