HA12D6B212
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The HA12D6B212 is a hydraulic actuator manufactured by Danaher. As part of the Timers and Controllers series, it features a double-acting actuation method and a 12-inch (304.8 mm) stroke length. The actuator is made with a steel cylinder body and can handle a maximum working pressure of 3000 psi (207 bar).
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Product Description:
Danaher designs the electromechanical control timer HA12D6B212, with a panel mounting configuration through its four rear studs. It functions on a 440 V supply voltage at 60 Hz frequency and provides an adjustable time span of 0 sec to 120 sec. This timer possesses an internal synchronous motor which drives the timing mechanism and its alarm clock automatically resets after power loss.
The HA12D6B212 control timer features an on-delay function with electric reset capability and it uses a spring-driven clutch to return the cam to zero. Its dial has a 4-inch diameter for easy time settings and it includes a vernier dial for precise adjustments. The HA12 control timer has an outer scale that displays full timing range and its inner knob offers control with a 20:1 gear ratio. A pointer indicates timing progress during operation and this unit supports up to three SPDT output contacts. These contacts are rated for 5 A at 440 volts and its contacts can handle both resistive and inductive loads. Some contacts switch instantly when power is applied while others change state at the end of the timing cycle. The HA12 control timer maintains output until the timing cycle ends and it resets when input power is removed. It includes a screw terminal block for wiring, to offer clear access for coil and contact connections. This device provides ±5% timing accuracy for standard cycles.
The HA12D6B212 control timer comes in a metal housing with a molded faceplate and it can operate in temperatures from 0 to 140 °F. It is suitable for conveyor, pump and process control systems, where reliable and repeated delay function is required. This HA12 control timer’s front dial includes a lock mechanism to prevent unwanted changes.
Frequently Asked Questions about HA12D6B212:
Q: How does the spring-driven clutch in the HA12D6B212 timer improve reset precision?
A: The spring-driven clutch ensures a consistent return of the cam to zero without overshoot. This enhances timing reliability in repeat-cycle applications.
Q: Why is a 20:1 gear ratio used in the HA12D6B212 control timer?
A: The high gear ratio allows finer control over the timer setting, improving adjustment accuracy. It enables more precise delay timing in critical operations.
Q: What is the benefit of using an internal synchronous motor in this timer?
A: The synchronous motor ensures stable and consistent timing cycles. It prevents drift even with power fluctuations, maintaining timing integrity.
Q: How do SPDT contacts in HA12D6B212 support different load types?
A: These contacts can switch both resistive and inductive loads up to 5 A at 440 V. This versatility allows integration with various control circuits.
Q: How does the vernier dial on the HA12D6B212 assist in industrial timing tasks?
A: The vernier dial allows precise, small-scale adjustments within the full time range. This is essential in processes where exact delays are critical.
