Allen-Bradley 1336-MCB-SP1 Main Control Board – Frame B Through H Compatibility

Product Overview

The Allen-Bradley 1336-MCB-SP1 is the main control board for the 1336 series of adjustable frequency AC drives, serving as the central processing and signal interface component that governs all drive operations. Manufactured by Allen-Bradley (Rockwell Automation), this board carries the alternative part number 74100-071-51 and is a fundamental element of the drive’s circuit board platform . The 1336-MCB-SP1 manages control logic, analog and digital signal processing, and communication functions that enable precise motor speed and torque regulation in industrial applications.

Positioned as the primary interface between external control signals and the drive’s internal power architecture, the 1336-MCB-SP1 handles a comprehensive range of input and output functions. The board processes analog voltage inputs from 0 to 10 VDC and current inputs from 4 to 20 mA, supporting potentiometer control, pulse inputs, and form A and form C relay outputs . Integrated analog-to-digital and digital-to-analog converters provide 10-bit and 12-bit resolution respectively, ensuring accurate signal translation for demanding motor control applications . The 1336-MCB-SP1 is compatible with Frame B through Frame H drive configurations, making it a versatile component across the 1336 drive family .

The Allen-Bradley 1336-MCB-SP1 belongs to the 1336 Drives product family and is designed for use with 1336 PLUS, 1336 PLUS II, 1336 FORCE, and 1336 IMPACT drive series . As the main control board, it hosts the terminal block TB2 for control and signal wiring at the bottom of the board, along with jumper terminals that accommodate optional add-on components such as Control Interface boards, communication adapters, and Snap-In Human Interface modules . The board has been discontinued by the manufacturer, making it a critical spare for facilities maintaining legacy 1336 drive systems in operational condition.

Technical Specifications