Marsh Bellofram 354A-350-Q-10PX Predetermining Counter

Marsh Bellofram’s 354A-350-Q-10PX Predetermining Counter is a rugged Shawnee II timing device designed to count input pulses to a preset value and then activate or hold an output, making it ideal for batch counting, production runs, and cycle-based control on automated lines. Built by Marsh Bellofram’s ATC Diversified Electronics division, this 120 V AC unit (with 95–132 V, 50/60 Hz nominal operation and a 190–264 V, 50/60 Hz variant for other configurations) is housed in a NEMA 12 molded case and is intended for front-panel mounting with standard hardware (with an optional surface-mount kit). In the 350-series family the counter offers configurable count ranges and a Q-series output, with counts that can reach up to 9,999 or 99,990 counts depending on configuration; the 10PX designation places it among the higher-count options in this lineage. Load switching is available via a relay rated up to 5 A at 120 VAC (or 1/20 HP at 120 VAC), with optional solid-state output modules and an external 4–30 V DC input supply for the switch logic. Timings support both delayed mode (output energizes at cycle end) and interval/recycle modes, with practical pulse handling up to several kilohertz and a compact 1 lb 7 oz package. The unit is designed for industrial environments, with a temperature range of 32° to 140°F (0° to 60°C) and standard front-panel dust protection.