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Description
Application Scenarios:
Consider a vertical form‑fill‑seal (VFFS) packaging machine running printed film at 150 bags per minute, where a rotary encoder tracks film travel and a photoelectric sensor detects the printed registration mark. The cutter must fire at exactly the right film position — every bag, every cycle — or the printed logo lands off‑center and the bag becomes scrap. A standard discrete input card would introduce several milliseconds of scan‑dependent latency, enough at line speed to drift the cut by multiple millimeters. The 1756‑HSC was engineered for exactly this pain point: its hardware latching captures the registration mark within 1 µs of sensor transition, and its onboard outputs fire the cutter from stored preset values without any processor intervention — holding cut registration within ±0.5 mm and delivering documented 15–20 % reductions in film waste on VFFS lines.autonexcontrol.com The same architecture applies to turbine and positive‑displacement flow meters feeding totalizer loops in custody‑transfer skids, to conveyor length‑measurement stations in extrusion and corrugated lines, to print‑cylinder registration on web‑fed presses, and to any batch‑counting application where a missed pulse is a rejected product rather than a rounding error.lenmark.com+1
Parameter:
| Main Parameters | Value / Description |
|---|---|
| Product Model | 1756‑HSC |
| Manufacturer | Allen‑Bradley (Rockwell Automation) |
| Product Category | ControlLogix High‑Speed Counter Module |
| Number of Counters | 2 independent counters |
| Inputs per Counter | 3 (A, B, Z for gate / reset) |
| Max Counting Frequency | 1 MHz (Counter mode, A input); 500 kHz (Rate Measurement); 250 kHz (Encoder ×1 / ×4) |
| Count Range per Counter | 0 to 16,777,214 (24‑bit) |
| Debounce Filter | Up to 70 Hz (selectable for noisy signals) |
| Digital Outputs | 4 sourcing DC outputs (2 per group, assignable per counter) |
| Output Current Rating | 20 mA @ 4.5–5.5V DC; 1.0 A @ 10–31.2V DC per point |
| Output Response Time | OFF→ON 20 µs nominal / 50 µs max; ON→OFF 60 µs nominal / 300 µs max |
| Input Voltage Range | 4.5–5.5V DC (TTL) / 10–26.4V DC (12/24V ops) |
| Input Current | 15 mA nominal, 4 mA minimum per input |
| Backplane Current Draw | 300 mA @ 5.1V DC; 3 mA @ 24V DC |
| Power Dissipation | 5.6 W max @ 60°C (19.1 BTU/hr) |
| Isolation | 125V continuous basic insulation (input group to backplane); 30V (group to group) |
| Terminal Block | Removable, catalog 1756‑TBCH or 1756‑TBS6H, screw connection |
| Slot Width / Keying | 1 slot; electronic software‑configurable module keying, user‑defined RTB keying |
| Output Protection | Electronic short‑circuit protection (auto‑reset via On/Off toggle), reverse‑polarity protection |
| Dimensions (H × W × L) | 10.67 × 12.45 × 17.27 cm |
| Weight | 1.35 kg |
| Operating / Non‑Operating Temp. | 0 to +60°C / –40°C |
| Relative Humidity | 5–95% non‑condensing |
| Shock / Vibration | 30G operating shock, 50G non‑operating; 2G @ 10–500 Hz vibration |
| Certifications | CE, UL, cUL, CSA, KC, GOST, Marine, RCM; North American temperature code T4 |
