AC240-360V Programmable Logic Controller PLC Allen Bradley 1794-VHSC

The Allen‑Bradley 1794‑VHSC is a FLEX I/O very high‑speed counter expansion module used in Rockwell PLC distributed automation systems. It collects high‑frequency pulse signals from incremental encoders, proximity sensors and pulse generators, supports single‑ended and differential signal input modes, and achieves high‑precision position measurement, speed feedback and frequency counting. Equipped with 2 independent counter channels and 4 local isolated switching outputs, the module can independently execute position comparison control without being restricted by PLC program scan cycles, perfectly matching ControlLogix, CompactLogix and other mainstream Allen‑Bradley PLC hosts to build stable distributed motion control systems for automated production equipment.

• Dual independent high‑speed counter channels, maximum counting frequency up to 1 MHz, supports quadrature encoder, single‑phase counting, speed measurement and PWM working modes
• Compatible with 5 V DC and 24 V DC field input signals, supports differential RS‑422 and single‑ended TTL wiring, excellent anti‑interference performance for long‑distance on‑site wiring
• Built‑in 4 isolated DC outputs with two groups of isolated circuits, local high‑speed action control independent of PLC scan cycle, effectively reducing system response delay
• Optical isolation design between channels and backplane bus, effectively isolating surge and common‑mode interference to protect the main PLC controller
• Standard FLEX I/O modular structure, DIN rail installation, flexible expansion and quick wiring with matched terminal base
• Supports 8 position comparison window configurations, can replace traditional programmable limit switches to realize precise positioning and linkage control
• Wide operating temperature range, stable operation in complex industrial electromagnetic environments
• Fully compatible with all Allen‑Bradley FLEX series I/O adapters, easy system upgrade and spare parts replacement

Automotive assembly production lines, packaging and printing machinery, CNC machine tools, new energy battery processing equipment, textile winding machinery, logistics palletizing and handling equipment, rubber and plastic injection molding equipment, metallurgical automated transmission equipment.

1. Servo and stepping motor encoder position & speed closed‑loop feedback control
2. High‑precision fixed‑length cutting, winding and positioning control for textile and film production lines
3. High‑speed counting and position limit interlock for automated conveyor and sorting equipment
4. Replacement of traditional PLS programmable limit switches for high‑speed positioning linkage control

1. Application Scenario Image Alt: Allen Bradley 1794-VHSC high speed counter module installed in industrial control cabinet for automated equipment precision motion positioning and encoder signal acquisition
2. Warehouse Image Alt: Original sealed Allen Bradley 1794-VHSC modules stored in constant temperature dust-proof warehouse, genuine Rockwell industrial automation spare parts with sufficient spot inventory