the board that i operate. 17 safety systems 1. block lights 2. E-stop 3. Lift start 4. Lift Stop 5. Transfer table 6. Restraints 7. Brakes 8. Dispatch enable 9. Air gates 10. Air pressure gauge 11. Panelview 12. Operators 13. Speed sensors 14. Limit switches 15. Photo cells 16. Chain dogs 17. Anti-rollbacks. shag..