Description
OMRON CJ1W‑CT021
Technical Specifications: Total counting channels: 2 independent axes; maximum input frequency 500 kHz; support input types: RS‑422 line‑driver, open‑collector encoder signals; compatible input voltage levels DC5V, DC12V, DC24V; 32‑bit counting range from ‑8388608 to +8388607; built‑in 2 external control inputs and 2 physical outputs, 30 software virtual outputs; variable digital noise filter configurable via software; internal current consumption 280 mA at DC5V; operating temperature 0‑55°C; storage temperature ‑20‑75°C; operating humidity 10‑90%RH without condensation; dimensions 31 mm × 90 mm × 65 mm; weight 100 g; CE, UL, cULus certifications; screw‑type front‑panel connector for field signal wiring欧姆龙自动….
Functional Features: Hardware‑based high‑speed counting completely decoupled from PLC scan cycle; support linear counting, ring counting and multiple external trigger modes; configurable noise filter suppresses pulse interference from industrial field environment; hardware comparison output achieves fast response up to 100 μs; front‑panel LED indicators display channel status and fault information; allocate special I/O memory area for parameter setting and status reading; fully compatible with CJ‑series and NJ‑series backplane bus architectureオムロン.
Application Scenarios: Machine‑tool axis position measurement; cutting equipment length‑tracking control; conveyor‑line speed monitoring; packaging machinery high‑speed position trigger control; material winding and unwinding position closed‑loop control; spare‑part replacement for legacy CJ‑series automation systems.
Performance Parameters: Maintain stable counting performance under full‑range 500 kHz pulse input; optocoupler isolation blocks surge interference from field wiring; vibration and shock resistance conform to IEC 60068‑2‑6 and IEC 60068‑2‑27 standards; support continuous 24‑hour long‑term running inside industrial control cabinets.
Material Composition: Black V0 flame‑retardant engineering‑plastic housing; internal FR‑4 multilayer glass‑fiber printed‑circuit board; high‑speed counter logic processing chip; optocoupler signal isolation components; brass nickel‑plated screw connector terminals; gold‑plated backplane edge‑connector contacts; high‑brightness multi‑color LED status indicators.
Structural Features: Standard CJ‑series slim rack‑slot module profile; gold‑plated edge‑connector on rear side mates with CJ‑series backplane bus; front‑panel dense screw terminal block connects encoder pulse signals; multiple LED indicator groups display channel working state and error codes; side locking clips secure module firmly into rack slots.
Working Principle: External encoder pulse signals pass through front‑panel terminals and optocoupler isolation circuit and enter hardware counting logic chip. The chip accumulates pulse quantity according to configured counting mode. Internal comparison circuit continuously compares real‑time count value with preset threshold parameters. When matching condition triggers, physical output terminals or software virtual output bits activate. Count value, status flags and fault information transmit to PLC CPU through CJ backplane bus for user program reading and processing. External control input terminals execute preset functions including gate control, preset, reset and capture according to parameter configurationオムロン.
Installation Requirements: Insert CJ1W‑CT021 into any available slot on CJ‑series main rack or expansion rack; fasten the whole CJ‑series rack onto standard DIN rail inside control cabinet; use shielded twisted‑pair cables for encoder pulse signal wiring; separate pulse signal cables from high‑power motor and inverter power cables; ensure reliable protective grounding for control cabinet.
Usage Notes: Hot‑swap of this module is strictly prohibited; confirm encoder output electrical level matches module input configuration; do not exceed maximum 500 kHz input frequency rating; avoid operating in environments with corrosive gas or condensation; regularly inspect fastening torque of screw terminals.
