2.10. Intrinsic Safety Connection

2.10. Intrinsic Safety Connection

 

The intrinsically safe pressure switch input circuits are monitored by the purge control B/D. When the robot body is pressurized, the purge control b/d activates the purge solenoid valve in the air purge unit.

 

Figure 2.15 Purge Control B/D

 

For intrinsically safe signals, maintain 50.0 mm distance from all other cables and connections.

 

IS ground cable shall have a minimum thickness of 12 AWG (4mm2). Intrinsic safe ground connection shall be required to connect dedicated conductor (earth bar in below figure) run to the reference ground point. The resistance of this connection must be less than 1 ohm.

 

Figure 2.16 Controller Internal Wiring