Our policy is one of continued research and development. We therefore reserve the right to amend,
without notice, the specifications given in this document. © 2020 Norgren Automation Solutions, LLC 16044UI
10/20
Table 1
Gripper state Red LED(s) state Output
Un-calibrated Off Off
Gripper Closed (no metal) Off Off
Clamped on 1 sheet On On
Clamped on more than 1 sheet Flashing Off
Gripper Open Off Off
4. Wiring:
The double blank sensor provides single discrete outputs which is activated based on the material thickness
detected each time the gripper closes. Table 1 outlines the Sensor LED states and the output states.
PLC logic can be written to enable the part transfer, stop the part transfer and provide operator fault
warnings depending on the requirements of your application. During calibration the sensor establishes
two thresholds which are used to determine part present and double blank.
1 Sheet Output – This output will turn on whenever the detected thickness falls between the lower
and upper thresholds (a single sheet is present). This should be off while the detected thickness falls
below the lower threshold or when the gripper is open.
This output can be used by itself with logic written that allows the transfer to proceed if the 1 sheet
output turns on, but not proceed if it is off. This approach does not differentiate between a no
sheet condition or a multiple sheet condition. The 2-sheet output is required to make this distinction.
Note: Because this sensor is a 2-wire sensor, the current draw needs to be kept low. To accomplish this the LED's are not as bright as a
standard 3-wire NPN/PNP sensor.
Typical Wiring
2
3
1
1 = GREEN/Yellow
2 = RED/BLACK
3 = RED/WHITE
Input Card
Sensor
3
2
1
+24V
R
NC
Sensor off 1.8mA
Sensor on up to 50mA
Example:
If R=1K then off volotage=1.8V, on voltage=16V
