AB Quality Allen-Bradley 2755-SN3, Руководство пользователя

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Installing the Wiring Base and Power Supply 3–22
The package detect input accepts only a current sinking output.
Allen-Bradley Photoswitch
r
package detectors are recommended.
Select a switch from the PhotoSeries 6000 or 9000 product line that
best suits your application. Make sure you order a sinking (12V
DC) type sensor. Mounting brackets and cables are also available.
Important: Package detect terminals are not powered until a Reader
is installed on the wiring base.
The package detector must be able to operate using the +12V DC
source (12V) and not draw more than 100mA. The package detect
sense line (TRG) must be able to sink 5mA at +12V DC.
Follow these guidelines when installing a package detector.
•
Mount the package detector and reflector so that the scan beam
does not strike either of them.
•
Install the reflector within the operating range of the package
detector.
•
The package detector beam must be broken before the label is in
position for scanning. The package detect should remain active
while the symbol is being scanned.
•
Grounding the trigger (on Package Detect terminals in wiring
base) activates the package detect (scanner).
Package Detector