Product Description:

The 40PA57-36-37-TENV-S is a shaft-mounted feedback module produced by Pacific Scientific and assigned to the Permanent Magnet DC Motors series. It attaches to the rear of a compatible DC motor and converts mechanical rotation into an electrical signal that can be interpreted by a control drive. Within automated packaging lines, conveyor systems, and light machining centers, that signal is used to regulate velocity, coordinate axes, and initiate protective shutdowns when commanded speeds are exceeded. The compact housing and direct-coupled design keep installation straightforward and reduce overall drivetrain inertia.

The mechanical interface follows a 0.187 in standard shaft diameter, allowing the tach body to slide over common motor outputs without additional machining. An alternate fitment of 0.120 in with ST-9502-1 can be selected when reduced-diameter shafts are present, preventing slip and eccentricity. Overall adapter size is classified as Small, so the assembly keeps clearance envelopes tight inside crowded panels. With a TENV enclosure, internal surfaces remain isolated from dust and oil, which helps preserve signal quality in harsh areas. There is no large tach option, so the package uses only the low-profile sensor head and avoids the added inertia of an oversized tachometer rotor.

Electrical pairing is restricted to the SR36 motor type, ensuring magnetic coupling and generated pulse levels align with the intended drive electronics. The unit’s designated role is Speed Monitoring, so its output frequency is read directly by controllers that supervise closed-loop speed regulation. Dimensional tolerances remain consistent across matching motors in this series, which helps the module fit compatible rear-mount arrangements. This arrangement supports accurate feedback without adding unnecessary bulk to the motor assembly.