Redundant Configuration
The Process Supervisor duplex redundant option provides

• Two separate processor units
• Separate power supply connections for each processor
• Dual control network connections (ARCnet and Ethernet)
• Dual I/O network connections (Profibus DP, DPV1 and Modbus serial)

In duplex operation, the two processor modules are designated one as primary and the other as secondary. On power-up the primary module runs the control strategy and communications while the secondary tracks the primary operation and status via a high-speed data link. Upon detection of a failure in the primary processor, the changeover form the primary to the secondary will be automatic and bumpless, initiated by watchdog circuits and software checks.

All control and I/O communications are also switched transparently from primary to secondary in the event of a failure.

The fascia of each processor gives visualization of its status via LED and also allows processor synchronization and manual changeover.

Flexible Communications
The Process Supervisor supports a number of different communication ports simultaneously. Connections via RJ45 connectors are provided via the Connect Module allowing the replacement of the Process Module without effecting the cabling LIN communications.