1794-IJ2 Allen-Bradley Frequency Input Module Specs

1794-IJ2 Frequency Input Module Overview

Technical Specifications

• Input frequency range: 1-32 kHz for sine wave and 1-32 kHz for square wave signals.
• Input pulse width requirement: 20 µs minimum for reliable signal detection.
• Raw frequency value maximum: 32,767 or 3,276.7 depending on the selected range.
• External DC supply range: 19.0 to 31.2V DC (includes 5% AC ripple).
• Power dissipation: 4.6W maximum at 31.2V DC; thermal dissipation: 15.6 BTU/hr maximum.
• FlexBus current draw: 30 mA at 5V DC for backplane communication.
• Output specifications: two isolated outputs with nominal 24V DC, min 10V DC, max 31.2V DC.
• Output on-state current: 1.0A per channel maximum, with 2A surge for 50 ms (repeatable every 2 seconds).
• Output switching time: turn-on in 0.5 ms, turn-off in 1 ms when triggered by frequency or acceleration alarm.
• Module resolution range: 0.01% to 0.00002% corresponding to sample frequency from 2 to 1000 ms.
• Sampling accuracy: ranges from +/- 0.02% to +/- 0.00004% depending on sample rate.

Compatible Hardware and Mounting

• The 1794-IJ2 requires terminal base 1794-TB3G or 1794-TB3GS for operation.
• You can mount this module on a DIN rail using the 1794-NM1 mounting kit.
• Alternatively, screw mounting is also possible for flexible installation needs.
• The flex bus connector must insert fully into the terminal unit for proper communication.
• Wire size depends on the installed terminal base; refer to the base manual for details.

Environmental and Operating Limits

• Operating temperature range: 0 to 55 degrees Celsius for industrial environments.
• Maximum starting current: 10 A during initial power-up.
• The module has electrical fusing on inputs and outputs to prevent damage during power interruptions.
• Front panel includes input indicators, output indicators, power status LED, and wire-off fault indicator.
• You can write individual I/O assignments on the insertable label for easy identification.

Frequently Asked Questions (FAQ)

• Q: Is the 1794-IJ2 a brand new original module?
  A: Yes, we supply only brand new and original 1794-IJ2 modules with factory seals.
• Q: What real stock do you have for the 1794-IJ2?
  A: We have many 1794-IJ2 units in stock, ready to ship within 5 days.
• Q: Which carriers handle shipping?
  A: We use FedEx, UPS, and DHL for reliable and traceable delivery worldwide.
• Q: Can I return the 1794-IJ2 if it doesn't fit my system?
  A: Yes, we accept returns within 30 days, no restocking fee for unopened modules.
• Q: What terminal base works with the 1794-IJ2?
  A: You need the 1794-TB3G or 1794-TB3GS terminal base for this module.
• Q: Does the 1794-IJ2 support both sine and square wave inputs?
  A: Yes, it accepts both sine wave and square wave from 1 to 32 kHz.
• Q: What is the minimum input pulse width required?
  A: The module requires a minimum input pulse width of 20 µs for proper detection.

For inquiries, contact us at sales@nex-auto.com or via WhatsApp at +86 153 9242 9628.

Partner: NexAuto Technology Limited