Appendix B Cable Specifications 99-000017-01 Photo Sensor, Visible, NPN, Dark On The 99-000017-01 Photo Sensor, Visible, NPN, Dark On is an external trigger device with a 4-pin Micro-Change connector. Figure B-6 shows the 99-000017-01 Photo Sensor, Visible, NPN, Dark On. FIGURE B–6. Photo Sensor, Visible, NPN, Dark On 99-000017-01 Schematic Table B-8 describes the signals for the 99-000017-01 Photo Sensor, Visible, NPN, Dark On. TABLE B–8. Photo Sensor, Visible, NPN, Dark On Pin Assignments B-8 Vision MINI Smart Camera Guide Pin Function 1 +10-28V 2 NPN 3 Ground 4 +10-28V