744386-241
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The 744386-241 is an electromechanical totalizer with a panel mount design, capable of operating at 115 VAC. Manufactured by Danaher as part of their Timers and Controllers series, it features a lock-and-key reset and a count speed of 600 cpm. The totalizer weighs 0.5 kg and has a die-cast Zamak case.
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Product Description:
Danaher designs 744386-241 as a part of the 7443 series of timers and controllers, with flange panel mounting. It is UL recognized and CSA certified for compliance and safety. This unit features a 6-digit mechanical display that offers clear numeric readouts, while its digits are engraved on black base with white color and measures 0.188 inches in height.
The 744386-241 timer requires a supply voltage of 115 V AC at 60 Hz and it consumes a power of 6 W during operation. Its counting function is activated by a 115 V AC pulse input and it can reliably register up to 600 counts per minute. Each pulse must last at least 50 ms to be recorded and faster pulses may not be processed due to mechanical limits. This counter includes a lock and key reset mechanism on the front panel to prevent any unauthorized clearing of the count. It retains its total even after power loss or interruptions and it is pre-wired with 12-inch, 22 AWG leads for connection. The 7443 timer needs a panel cutout size of 1.750 x 1.438 inches for mounting and its depth behind the front panel is approx. 2.53 inches. It is built with a die-cast zamak metal housing for enhanced durability and its internal gears along with number wheels are made from acetal resin plastic, to sustain harsh industrial environments.
The 744386-241 timer does not feature an electric reset option and its resetting is done manually using the provided secure key. Its mechanical design ensures stability against shocks and vibrations. This 7443 timer comes with a passive display that does not require additional power and it maintains precision up to the maximum speed limit.
Frequently Asked Questions about 744386-241:
Q: What is the main function of the 744386-241 timer?
A: The 744386-241 timer is designed for event counting and reliable time tracking in industrial settings. It accurately records up to 600 counts per minute, providing precision and consistency.
Q: How does the pulse input affect the timer’s operation?
A: The 744386-241 requires a 115V AC pulse input, with each pulse lasting at least 50 milliseconds. This ensures the timer operates effectively while avoiding mechanical limits with faster pulses.
Q: Why does the 744386-241 timer use a mechanical display instead of an electronic one?
A: The mechanical display provides a passive, reliable, and clear numeric readout without additional power. This makes it energy-efficient and easier to read in industrial settings without requiring extra electrical connections.
Q: How does the lock-and-key reset mechanism work on the 744386-241 timer?
A: The lock-and-key reset feature is a manual security mechanism to prevent unauthorized resetting. It ensures that the timer count remains intact and cannot be easily cleared by accidental or malicious actions.
Q: What materials are used in the construction of the 744386-241 timer?
A: The timer features a die-cast zamak metal housing for durability, and its internal gears and number wheels are made from acetal resin plastic. These materials help withstand vibrations, shocks and harsh environmental conditions.
