PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1797-IBN16 is a FLEX I/O digital input module designed for intrinsically safe applications. It features sixteen non-isolated sinking input channels compatible with NAMUR field sensors. The unit operates in Class I, II, and III, Division 1 hazardous environments. It is also certified for installation in Zone 1 and Zone 22 atmospheres.
Field connection requires an intrinsically safe 1797-TB3 or 1797-TB3S terminal base unit. Standard FLEX I/O terminal bases are not compatible with this module. Diagnostic indicators include sixteen yellow channel status LEDs and sixteen red fault LEDs. A single green LED displays module power status. The hardware operates within an ambient temperature range of -20 to 70 degrees Celsius.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| UPC | 612598180264 |
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| Weight | 1.19 lbs (0.54 kg) |
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| Input Frequency | 1000 Hz max |
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| Off-state Current | 1.2 mA |
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| On-state Current | 2.1 mA |
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| Product Description | Flex Ex NAMUR Input Module |
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| No. of inputs | Sixteen (16) non-isolated, sinking inputs |
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| Digital Input Type | NAMUR Compatible type |
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| IS input type | Ex ia IIB/IIC T4, AEx ia IIC T4, Class I, II, III Division 1 Group A-G T4 |
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| IS module type | Ex ib IIB/IIC T4, AEx ib IIC T4, Class I, Division 1 Group A-D T4 |
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| Input pulse width | >500 µs on or off |
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| Input delay times | 1 ms, 2 ms, 3 ms, 5 ms, 9 ms, 17 ms, 33 ms |
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| Indicators | 16 yellow status indicators 16 red fault indicators 1 green module power indicator |
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| Terminal Base | 1797-TB3 or 1797-TB3S |
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| Conductor wire size | 4 mm2 (12 gauge) stranded; max 1.2 mm (3/64 in.) insulation max |
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| Inputs | 16 |
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| Input Type | Nonisolated Sinking |
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| Hysteresis | 0.2 mA |
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| Power Dissipation | 2.8 W |
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| Thermal Dissipation | 9.6 BTU/hr max. |
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| Max. Load Voltage | 7.5 V DC |
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TECHNICAL INFORMATION
Features
- Sixteen non-isolated sinking input channels compatible with NAMUR discrete devices.
- Selectable input filter delay times ranging from 1 ms to 33 ms.
- Sixteen yellow status indicators and sixteen red channel fault LEDs.
- Certified for mounting in Class I, II, and III Division 1 locations.
- Designed for direct installation onto 1797-TB3 or 1797-TB3S terminal bases.
TECHNICAL INFORMATION
Applications
- Class I, II, and III Division 1 hazardous locations.
- Zone 1 and Zone 22 classified explosive atmospheres.
- Discrete NAMUR sensor monitoring within intrinsically safe FLEX I/O architectures.
TECHNICAL INFORMATION
Connections / Interfaces
- Mounts directly on 1797-TB3 and 1797-TB3S intrinsically safe terminal base assemblies.
- Accepts 4 mm2 or 12 gauge stranded field wiring.
- Field conductor insulation must not exceed 1.2 mm in thickness.
TECHNICAL INFORMATION
Installation Guidelines
- Install the module exclusively on a 1797-TB3 or 1797-TB3S terminal base.
- Do not install this module on standard FLEX I/O terminal bases.
- Use 4 mm2 stranded copper wire with maximum 1.2 mm insulation.
TECHNICAL INFORMATION
Configuration Guidelines
- Select channel input delay times of 1, 2, 3, 5, 9, 17, or 33 ms.
- Default transition delay setting is 1 millisecond for both transitions.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley 1797-TB3 intrinsically safe terminal base unit.
- Allen-Bradley 1797-TB3S spring-clamp intrinsically safe terminal base unit.
TECHNICAL INFORMATION
Compliance and Certifications
- Ex ia IIB/IIC T4 and AEx ia IIC T4 input certification.
- Ex ib IIB/IIC T4 and AEx ib IIC T4 module certification.
- Class I, II, and III Division 1 Groups A through G rating.
- Certifications include IECEx, INMETRO, C-UL, CENELEC, and FM.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley 1797-TB3 intrinsically safe terminal base unit. Allen-Bradley 1797-TB3S spring-clamp intrinsically safe terminal base unit.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What terminal bases are compatible with the Allen-Bradley 1797-IBN16?
The module requires a 1797-TB3 or 1797-TB3S terminal base. Standard FLEX I/O bases are incompatible.
What are the electrical ratings for the 1797-IBN16 inputs?
The module has a 9.5 V DC voltage rating. Maximum load voltage is 7.5 V DC.
What input delay times are selectable on the 1797-IBN16?
Delays can be set to 1, 2, 3, 5, 9, 17, or 33 ms. The default setting is 1 ms.
What hazardous locations can the 1797-IBN16 operate in?
The module is rated for Class I, II, and III Division 1, plus Zone 1 and 22 areas.
