Rockwell Automation 1794 Series FLEX I/O Digital Input Module

（2） Filter time setting

Filter time options: selected through 3 binary bits (FT0-FT2), default 0.25 ms, optional 0.5 ms, 1 ms, 2 ms, 4 ms, 8 ms, 16 ms, 32 ms (see Table 6 for specific correspondence).

Configuration position by model:

1794-IB8: The filtering control bit corresponds to the 0-2 bits of "Write 1" and controls all 8 input channels;

1794-IB16: Control Input 0-11 with 0-2 bits, Input 12-15 with 3-5 bits, and support counter function (Input 15 can be set as fast input/standard input, and needs to be configured through CF/CR bits);

1794-IB32/IB32K: The filtering control bit corresponds to bits 8-10 of "Write 1" and controls all 32 input channels.

Configuration example: If you need to set the filtering time of 1794-IB8 to 4 ms, you need to write binary "101" (corresponding to decimal 5) to the "Write 1" address at system startup to ensure that the filtering parameters take effect after the module is powered on.

Technical specifications and certification

（1） Core electrical specifications

Model Number of input channels Rated voltage Conducting current (typical) Turning off current (maximum) Isolation voltage Maximum power consumption

1794-IB8 8 (sinking type) 24V DC 8 mA 1.5 mA 50V DC (850V DC test for 60s) 3.5 W

1794-IB16 16 (sinking type) 24V DC 8 mA 1.5 mA 50V DC (707V DC test for 60s) 6.1 W

1794-IB32 32 (sinking type) 24V DC 4.1 mA 1.5 mA 50V DC (2121V DC test for 2s) 6.0 W

1794-IB32K 32 (sinking type) 24V DC 4.1 mA 1.5 mA 50V DC (2121V DC test for 2s) 6.0 W

（2） Environmental and mechanical specifications

Environmental parameters: working humidity of 5% -95% (no condensation), storage temperature of -40~+85 ℃, vibration (working) of 5 g @ 10-500 Hz (IEC 60068-2-6), impact (working) of 30 g (IEC 60068-2-27);

Mechanical parameters: Module size (with base) 94 × 94 × 69 mm (3.7 × 3.7 × 2.7 inches), weight 71-79 g, no shell (open type), relying on external shell protection.

（3） Compliance certification

The module has passed multiple international certifications to ensure compliant use worldwide, with core certifications including:

Safety certification: UL (Industrial Control Equipment, Class I Division 2 Hazardous Areas, USA/Canada), CSA, TUV (IB16 supports SIL 2 functional safety);

Electromagnetic compatibility (EMC): EN 61326-1, IEC 61000-6-2/4, in compliance with anti-interference and radiation requirements for industrial environments;

Dangerous Place Certification: ATEX (European Zone 2), IECEx (International Zone 2), UKEX (UK Zone 2);

Environmental certification: Compliant with the EU RoHS Directive (2011/65/EU) and China CCC Explosion proof Certification (CNCA-C23-01).