Allen‑Bradley 1797‑IBN16 FLEX Ex NAMUR Digital DC Input Module

Products Description

Allen Bradley 1797-IBN16 Flex Ex NAMUR Digital DC Input Module

Packing&Delivery

In order to save the freight and reduce your budget, we choose the packaging for environment-friendly. We use foam board with 3 cm thick to fill in all around the box inside to protect parts, then use carton to pack the parts, but if they are too heavy, we will customized the wooden box for them.Shipping term DHL Fedex TNT EMS UPS.

Key Features

• 16 NAMUR‑compatible input channels – non‑isolated, sinking inputs for direct connection to proximity sensors and dry contacts

• Intrinsic safety ratings – Ex ia IIB/IIC T4, AEx ia IIC T4; Class I, II, III Division 1 Groups A‑G T4

• Integrated diagnostics – open‑circuit (wire‑off) and short‑circuit detection per channel with red fault LEDs

• High input frequency – up to 1000 Hz with minimum pulse width of 500 µs

• Selectable input filter times – 0.25 ms to 32 ms for noise immunity

• Built‑in counter function – optional pulse counting on input point 15

• Hot swap capability – removal and insertion under power (RIUP) supported

• Visual diagnostics – 16 yellow status LEDs, 16 red fault LEDs, 1 green power LED

Technical Specifications

NAMUR Diagnostics & Fault Detection

The 1797‑IBN16 distinguishes between four distinct line states, enabling immediate identification of field wiring issues without manual troubleshooting:

Hardware Fault Enable Switch

The module features a 4‑position DIP switch on the back to enable/disable fault detection in groups of 4 channels:

• OFF = Fault detection disabled for that group

• ON = Fault detection enabled for that group

System Integration Notes

Compatible Terminal Bases

The 1797‑IBN16 must be used with an intrinsically safe terminal base unit:

• 1797‑TB3 – screw termination

• 1797‑TB3S – spring‑clamp termination

Important: The keyswitch on the terminal base must be rotated clockwise to position 6 for this module type.

Flexbus Entity Parameters

The module has the following intrinsic safety entity values for interconnection with associated apparatus:

Wiring Notes

• Terminals 36 and 49 must not be connected

• All I/O wiring must use shielded cable; shields must be terminated external to the module

• Use 4 mm² (12 gauge) stranded wire, max insulation 1.2 mm (3/64 in.)

• For intrinsically safe field wiring, follow ANSI/NFPA 70, Article 504 and 505 or CSA C22.1, Part 1, Appendix F

Applications

The 1797‑IBN16 is ideal for hazardous area process automation:

• Oil & Gas – tank level monitoring, pipeline valve position feedback, flame detector inputs

• Chemical Processing – batch reactor safety interlocks, rotating equipment monitoring

• Pharmaceutical – clean room limit switches, temperature and flow switch monitoring

• Emergency Shutdown Systems – integration with SIS‑rated controllers

What's Included

• 1 × Allen‑Bradley 1797‑IBN16 FLEX Ex NAMUR Input Module

Why Buy From Us?

• In Stock – ready to ship same/next business day

• Fully Tested – each unit verified for functionality

• Competitive Pricing – significant savings

• Warranty Included – purchase with confidence

• Technical Support – integration assistance available

Frequently Asked Questions (FAQ)

Q1: How many input channels does the 1797‑IBN16 provide?

The module provides 16 input channels (non‑isolated, sinking).

Q2: What type of sensors can I connect to this module?

It is designed for NAMUR‑compatible 2‑wire proximity sensors (IEC 60947‑5‑6). Dry contacts can also be used but require external series and parallel resistors to maintain diagnostic functionality.

Q3: Can I use this module with standard 24V DC discrete sensors?

No. The 1797‑IBN16 is specifically designed for NAMUR sensors. For standard discrete inputs, consider other FLEX Ex variants.

Q4: What terminal base does this module require?

The module must be installed on a 1797‑TB3 (screw) or 1797‑TB3S (spring‑clamp) intrinsically safe terminal base unit.

Q5: Does this module support pulse counting?

Yes. The module has a built‑in counter function for input point 15. Configuration options allow the FaultOrCounter data member to report either fault status or pulse count.

Q6: What diagnostics are available on this module?

Each channel features open‑circuit (wire‑off) and short‑circuit detection. Fault detection can be enabled/disabled in groups of 4 channels via hardware DIP switches. Diagnostics are reported via red fault LEDs and diagnostic bits in the controller.

Q7: What is the maximum operating temperature?

The module operates in ambient temperatures from ‑20°C to +70°C (-4 to +158°F).

Q8: Can I replace this module while the system is powered?

Yes, the module supports Removal and Insertion Under Power (RIUP), allowing replacement without system shutdown.

Q9: What programming software is required?

The module is configured in RSLogix 5000 or Studio 5000 Logix Designer (version 20 or later) with appropriate EDS files.

Q10: What is the maximum input frequency?

The module supports input frequencies up to 1000 Hz with a minimum pulse width of 500 µs on or off.