Printronix SLPA8000 User Manual page 259

Product sensors of the following type may be used:
Type
12 - 24 VDC Photo eye
(Provided)
Device using NPN Transistor with
open collector output
SINK 50 ma
Mechanical Switch
CAUTION
The internal signal is pulled up to +24VDC.
Use shielding cables which should be grounded at the SLPA end. It is
also recommended that a 200 Ω ferrite be attached to the cable for
adequate EMI shielding.
The product sensor supplied by Printronix has a range of 12 inches (300mm)
and has a sensitivity adjustment for different sensing levels. This sensor has
two modes of operation, Light Operate and Dark Operate. When an object is
in front of the product sensor, the LED, located on the back of the sensor is lit.
When in Light Operate mode, the factory preset mode, the sensor will trigger
when the LED turns on (is lit). This mode would therefore apply a label when
the leading edge of the product is detected by the sensor. When in Dark
Operate mode, however, the sensor will trigger when the LED turns off (is not
lit). This mode would therefore apply a label when the trailing edge of the
product is detected by the sensor.
NOTE: For a standard SLPA, the sensor should be set to Light Operate
To adjust the product sensor delay to the correct time for the size of the
product:
1. Adjust the sensitivity by turning the gain on the top of the product sensor.
The red LED located on the top of the product sensor is provided to help
set the sensitivity.
To adjust to a lower sensitivity, turn the gain counterclockwise. To adjust
to a higher sensitivity, turn the gain clockwise.
NOTE: The product sensor should be set to a lower sensitivity if it is being
Pin Number
1
2
6
2
6
2
6
mode. If the Dark Operator mode is required, custom work is needed
and must therefore be specified prior to order placement.
If the sensor is set to Dark Operator mode for a standard SLPA, the
cylinder will always cycle one time on power-up.
triggered by background objects. If the product sensor does not
trigger when the product passes in front of the sensor, it should be set
to a higher sensitivity.
Mounting Stand
Pin Description
100mA max current allowed
GND
Signal
GND
Signal
GND
Signal
259