Duplex Motor and Pump Controller Products

Siemens Duplex Controllers

The Siemens duplex motor controllers are specifically designed for industrial and commercial applications that require duplex controls such as duel pumps or blowers. They perform one or both of two distinct functions: duplexing and alternation. The duplexing function provides capacity for system peaking or above normal demand without having both motors running at all times. It also provides standby capacity for use when one of the motors is disabled.

Duplex motor controllers consist of two motor starters in a common enclosure.

  • Class 83 is a non-combination duplex motor controller.

  • Class 84 is a combination duplex motor controller with two separate disconnects or circuit breakers



Class 83 Non - Combination


Class 84 Combination



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