Figure 6 Top and bottom viewsHigh-voltage barrierHigh-voltage wiring for the controller is located behind the high-voltage barrier in the controllerenclosure. The barrier must remain in place except when installing modules or when a qualifiedinstallation technician is wiring for power, alarms, outputs or relays. Do not remove the barrier whilepower is applied to the controller.Electrostatic discharge (ESD) considerationsN O T I C EPotential Instrument Damage. Delicate internal electronic components can be damaged by staticelectricity, resulting in degraded performance or eventual failure.Refer to the steps in this procedure to prevent ESD damage to the instrument:• Touch an earth-grounded metal surface such as the chassis of an instrument, a metal conduit orpipe to discharge static electricity from the body.English 11