613450-11A is an original factory DC tachometer speed feedback component under Reliance 613450 series, specially matched with FlexPak full-series DC variable speed drive systems for industrial driving equipment. It synchronizes rotation with DC motor output shaft to convert mechanical rotational speed into stable proportional DC analog voltage signal, and transmits feedback data to drive main control board to realize closed-loop speed regulation. Original production has been discontinued; available stock on market covers unused surplus original parts and factory-calibrated refurbished products, mainly used for spare replacement and field maintenance of legacy metallurgy, papermaking and mining production line drive equipment.

Numerical code 613450 stands for unified base product code of Reliance standard industrial DC tachometer series, defining consistent internal coil winding structure, basic mechanical outline and core electrical framework of the whole product family. Middle code 11 represents customized internal winding parameter and fixed output voltage grade for heavy-load industrial working condition. Suffix A denotes standard upgraded revised version with optimized internal insulation coating and anti-shock casing structure, keeping complete mechanical and electrical interchangeability with other suffix variants of same serial number without modifying mounting installation size.

Rated output voltage reaches 100VDC under standard rated rotating speed of 1800RPM, maximum allowable continuous working rotating speed is 5200RPM. Continuous operational ambient temperature ranges from -20℃ to +72℃, transient short-time withstand temperature covers -38℃ to +88℃, storage environmental temperature maintains -40℃ to +92℃ under dry non-corrosive gas environment. Working relative humidity is controlled between 5% and 90% without condensation phenomenon. Internal stator winding passes 1000VAC one-minute dielectric withstand insulation test. Standard installation form is flange fixed mounting conforming to Reliance original industrial component dimensional standard.

It adopts two-core shielded hard-wired terminal as exclusive analog signal output interface, with no embedded RS485, fieldbus or digital communication circuit. Speed feedback analog voltage signal is directly wired to drive control cabinet mainboard via shielded cable, no backplane plug-in bus docking design. Internal outgoing wire is pre-fixed inside metal casing to prevent wire looseness caused by long-term equipment vibration and mechanical shake.

Real-time collects actual rotating speed data of matched DC motor through coaxial synchronous rotation, converts mechanical rotation volume into linear proportional DC voltage signal relying on built-in permanent magnet and coil structure. Delivers standardized feedback signal to drive main control unit to realize closed-loop speed correction and constant speed control, automatically compensates speed deviation generated by sudden load variation during equipment running. Built-in transient surge absorption circuit suppresses instantaneous high voltage spike from rapid speed change, stabilizes output feedback voltage and avoids drive abnormal speed runaway or over-speed protection alarm.

Exclusive supporting speed detection component for all specifications of Reliance FlexPak DC speed adjustable drives and matched industrial DC driving motors. Widely deployed in closed-loop speed control system of metallurgical rolling mill main transmission, papermaking drying roller driving cabinet, chemical large-scale water pump and blower DC speed regulation equipment, also serves as replacement spare part for obsolete textile machinery, mine conveyor and printing industry legacy Reliance drive control units.

Cut off total AC input power of matched drive cabinet and wait more than 25 minutes to release residual capacitance stored electric charge before disassembly and installation operation. Ensure concentric coaxial connection between tachometer rotating shaft and motor output shaft to avoid eccentric abrasion and abnormal signal distortion. Avoid violent impact and long-term high-frequency vibration during equipment running to prevent internal coil lead fracture. Implement annual routine maintenance work, clean casing surface accumulated dust with low-pressure dry compressed air and regularly inspect terminal wiring fastening status and insulation aging degree. Random disassembly of internal encapsulated coil structure is forbidden; execute whole-unit replacement after troubleshooting external wiring and installation faults once internal circuit fails.