BLASI – Key operated switch (half-cylinder) for KDT-2 and TA-4

Name: BLASI - Key operated switch (half-cylinder) for KDT-2 and TA-4 - Best Spare Parts
SKU: BLSP-7910025

BLASI – Key operated switch (half‑cylinder) for KDT‑2 and TA‑4 is a compact key‑actuated control unit designed for BLASI KDT‑2 and TA‑4 automatic‑door operators. The “half‑cylinder” version means the key cylinder protrudes only partially from the operator tube or wall, giving a low‑profile, space‑saving interface while still allowing authorized users to turn the key and select modes such as OFF–Automatic–Continuous–Hand. It is mounted directly into the BLASI‑designed cut‑out on KDT‑2 and TA‑4 operator tubes, aligning with the standard wiring and mounting pattern so replacement is simple. With a robust cylinder and clearly labeled positions, BLASI – Key operated switch (half‑cylinder) for KDT‑2 and TA‑4 provides secure, manual mode control in indoor or sheltered entrances without adding bulk.

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Product Details

BLASI – Key operated switch (half‑cylinder) for KDT‑2 and TA‑4 serves as the main key‑controlled interface for changing how the KDT‑2 and TA‑4 doors operate. Turning the key through the various positions updates the BLASI control unit so the door can be stopped, run in normal automatic mode, forced into continuous motion, or placed in manual for service, depending on the configuration. The half‑cylinder design keeps the key‑cylinder short on the outside of the operator tube or wall, which reduces the risk of impact or tampering while maintaining the same internal contact arrangement as a full‑profile version. This is especially useful in tight or high‑traffic areas where a protruding key barrel could be bent or damaged.

Built for repeated use in commercial environments, BLASI – Key operated switch (half‑cylinder) for KDT‑2 and TA‑4 uses a durable key cylinder and reliable screw‑terminal contacts that integrate cleanly into the BLASI KDT‑2 and TA‑4 safety and control wiring schemes. It is typically supplied with one or two keys and matches the standard BLASI key‑cut pattern used on other key‑operated switches in the same building, so building‑wide key‑management is easier. The plate and mounting hardware keep the front of the switch aligned with the operator‑tube front plate, giving a clean, uniform appearance. By using BLASI – Key operated switch (half‑cylinder) for KDT‑2 and TA‑4, technicians and facility managers maintain a secure, space‑efficient operating‑mode control that supports safe service and consistent performance on BLASI‑based entrances.

Article No: 7910025