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The Allen-Bradley 1771-HS1 is a robust servo controller module from the PLC-5 series, part of the IMC121 Motion Control System, designed to occupy one slot in the 1771 I/O chassis. Equipped with 32 KB of CMOS RAM, it offers seamless compatibility with resolver and encoder feedback systems, complemented by fast 24 VDC inputs and outputs, and a programmable analog output. This module also includes an embedded RS232 communication port for interfacing with handheld pendants, providing facilities for debugging MML programs, executing axis jog functions, and managing motion path assignments. Ideal for integration with Allen-Bradley and IBM PC systems, the 1771-HS1 supports reliable operation under a wide temperature range and altitude, making it suitable for various industrial applications.