The 1794-IJ2 from Allen-Bradley is a high-speed counter input module within the FLEX I/O family, engineered for industrial applications requiring precise event counting, frequency measurement, or pulse train capture. This module accepts two 24V DC inputs, each capable of handling frequencies up to 20 kHz, making it ideal for monitoring rotating machinery, conveyor speeds, or flow meters. Its rugged design includes optical isolation and transient protection, ensuring stable operation in electrically noisy environments. The module's compact footprint allows for dense I/O configurations, while its compatibility with various FLEX I/O adapters simplifies integration into existing ControlLogix, CompactLogix, or SLC 500 systems. For engineers seeking reliable, high-resolution input processing, the 1794-IJ2 delivers exceptional performance with minimal maintenance requirements.
| Parameter |
Specification |
| Product Type |
FLEX I/O High-Speed Counter Input Module |
| Model Number |
1794-IJ2 |
| Number of Inputs |
2 (independent counter channels) |
| Input Voltage Rating |
24V DC (nominal), 30V DC maximum |
| Input Current |
7 mA typical per channel at 24V DC |
| Maximum Frequency |
20 kHz per channel |
| Counter Resolution |
16-bit (0 to 65,535 counts) |
| Input Filter Time |
Programmable: 0.1 ms to 10 ms |
| Isolation Voltage |
500V DC (input to backplane) |
| Power Supply Requirement |
5V DC from backplane (100 mA typical) |
| Operating Temperature |
0°C to 55°C (32°F to 131°F) |
| Storage Temperature |
-40°C to 85°C (-40°F to 185°F) |
| Relative Humidity |
5% to 95% non-condensing |
| Dimensions (H x W x D) |
94 mm x 46 mm x 75 mm (3.7 in x 1.8 in x 3.0 in) |
| Weight |
Approximately 0.1 kg (0.22 lb) |
| Certifications |
UL, CSA, CE, ATEX (Zone 2) |
| Compatible Adapters |
1794-ASB, 1794-AENT, 1794-AENTR, 1794-ACN15, etc. |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22