Schneider Electric AS-B883-001 High Speed Counter

Schneider Electric’s Modicon AS-B883-001 High Speed Counter is a two‑channel I/O module for the 984/800‑Series that handles fast counting up to 50 kHz. Counter 1 is bi‑directional (up/down) and Counter 2 is unidirectional up; both accept pulse or quadrature encoder inputs, giving flexible use for encoder-based position or speed measurements. The module includes an internal 1 kHz and 1 MHz clock, supports counts up to 9,999,999 on Counter 1 and up to 9,999 on Counter 2, and provides 6 auxiliary inputs along with 3 outputs. It can be powered from 5 Vdc, 12 Vdc, or 24 Vdc rails, with corresponding logic thresholds (5 V logic 2.4–5.5 V, 12 V 6–16 V, 24 V 12–32 V) and a ramp time of 7 V/s. Power consumption from +5 V is about 677 mA, and the unit occupies 1 rack slot, weighing roughly 3.3 lb (1.49 kg). The AS-B883-001 includes two programmable outputs with three modes of operation plus wiring options such as hardwire and software reset/enable/preset, and it provides a programmable match output for advanced counting logic. A terminal connector is included for straightforward wiring. This high‑speed counter module is designed for Modicon 984/800‑Series automation systems where fast event counting from sensors or encoders is required for precise position or speed control.