Group 11 Rotary Damper Drives and Actuators Beck rotary damper drives and rotary actuators are a benchmark in industrial control damper actuation. Unlike typical electric actuators, Beck damper drives and valve actuators are capable of continuous modulation and precision control without thermal duty-cycle or motor burnout concerns. Beck damper drives and actuators are specifically designed for harsh indoor and outdoor industrial environments and perform consistently over time. Group 11 damper drives and rotary actuators eliminate the performance problems typical of pneumatic and conventional electric actuators and are virtually maintenance-free.   Available in torque output ratings up to 7050 nm (5200 lb-ft).   For general information on specific models, please click on the following photographs               11-150               11-200                  11-300                 11-400                11-430      20 to 108 nm       169 to 339 nm           407 to 881 nm       474 to 2034nm        3932 to 7050 nm   General Specification   Input Power 120 V ac, single-phase 240 V ac, single-phase Operating Conditions -40° to 85° C. (-40° to 185° F.), 0% to 99% relative humidity Isolation Demand Input and Position Feedback signals are isolated from the ground and the ac power line. Action on Loss of Power Stays in place. Action on Loss of Input Signal (Power On) Stays in place or, on some drives, is field configurable to move to any preset position. Limit Switches Two SPDT switches (one for each direction of travel) provide over-travel protection. Auxiliary Switches Up to four 6 A, 120 V ac switches available. Switches are labeled S1 to S4 and are cam-operated and field-adjustable. Handswitch Permits local electrical operation, independent of controller signal. Standard on all units. An optional auxiliary contact can be used to indicate that the Handswitch is in "AUTO" mode or to sound an alarm if it is taken out of "AUTO". Modulating Control Deadband is 0.6% of span (configurable) Minimum step is typically 0.1% Standard Control inputs 4-20mA or 120VAC. Others available on request   Mechanical Features Drive Train: Durable and Efficient Beck’s durable gear train maintains accurate, consistent control element positioning even under the demanding conditions of an active control loop. Gear trains employ a unique, all spur gear construction of heat-treated alloy steels and ductile iron. Efficient, wide-face spur gearing virtually eliminates wear-induced backlash and positioning inaccuracies. Durable design provides up to 4 days of protection against intermittent or extended accidental stalls. Integral self-locking mechanism ensures that drives hold a load with the motor de-energized.   Manual Handwheel: Convenient Manual Control Without Declutch An easy-to-turn, spoke-free Handwheel is incorporated into the Group 11 design to allow manual operation during installation or power outages. Move valves and dampers to any position smoothly and easily without power, even under full load conditions. Mechanical stops in housing prevent manual overtravel.       Drive cutaway view displaying individual  compartments Housing: Superior Protection with Convenient Access to Components Beck drives feature a cast aluminum body with individual compartments to protect components from moisture and dirt, and allow easy access for installation and calibration. Precision-machined aluminum alloy castings with corrosionresistant poly-urethane paint provide a rugged, dust-tight, weatherproof NEMA 4X enclosure. Individual compartments protect all major components: Motor, DCM, CPS-2, gear train and installation wiring terminal board. Each compartment can be accessed without exposing other components.                 Mounting Versatility: Mount in any Orientation for Greater Installation Flexibility Group 11 Beck drives are designed to be mounted in any convenient position. The no oil bath design eliminates the potential for leaks. As long as housing compartments remain accessible, there are no mounting orientation limits.

Electrical Features

Beck Drive Motor:
Precise, Reliable Control

Together with Beck’s control electronics and rugged gear train, Beck motors provide the precise, reliable positioning required for modern control loops.

• Never overheats or burns out, even under demanding modulating control or stalled conditions.
• Reaches full speed and torque in less than 50 milliseconds and stops within 25 milliseconds, eliminating deadtime.
• Provides extremely accurate positioning in modulating applications.
• Will not coast or overshoot the desired position.
• Low current draw of 0.16 A to 3.0 A, and therefore low power consumption, eliminates the need for relays and permits the use of uninterruptible power supplies.
• Maintenance-free with double-lipped, grease-sealed bearings.

Electric Handswitch:
Time-Saving Local Operation

Dampers or valves may be operated at their individual locations with the built-in electric Handswitch. This saves time during installation and troubleshooting, allowing on-line adjustments to be made quickly and easily by bypassing the electronics in the drive and control system.

The Handswitch also serves as an electrical backup in the event of control system failure.

Auxiliary and Over-travel Limit Switches:

Two over-travel limit switches and up to four auxiliary switches are provided on Beck drives.

• SPDT switches rated for a minimum of 6 A at 120 V ac, (three times maximum motor current for most models) to ensure long life.
• Field-adjustable to operate at any point in the drive’s travel range.
• May initiate secondary functions or provide remote indication of drive position.
• Eliminates unreliable and maintenance- intensive proximity switches.