Allen-Bradley 1746-NIO4I Analog Input/Output Module – SLC 500 Series
When a critical analog signal chain fails on the plant floor — a 4–20 mA loop drops out, a thermocouple reading goes flat, or a PID loop loses its feedback — production doesn’t slow down; it stops. Operators scramble, engineers troubleshoot under pressure, and every minute of unplanned downtime compounds into real financial loss. The Allen-Bradley 1746-NIO4I is the precision analog interface that keeps those loops alive, delivering isolated, high-resolution analog I/O directly inside the SLC 500 chassis — no external signal conditioners, no ground-loop interference, no compromises.
Within the SLC 500 family, the 1746-NIO4I occupies a specialized niche: it is the isolated analog combination module, distinguishing itself from the non-isolated 1746-NIO4V by providing channel-to-channel and channel-to-backplane isolation. This isolation capability makes it the preferred choice for demanding process industries — oil & gas, chemical, water treatment, and power generation — where signal integrity and personnel safety are non-negotiable. Globally, the SLC 500 platform remains one of the most widely deployed mid-range PLC architectures, and the 1746-NIO4I continues to be a critical spare and upgrade component for tens of thousands of installed systems worldwide.
Technical Specifications
- Module Type: Combination Analog Input/Output (Isolated)
- Catalog Number: 1746-NIO4I
- Platform: Allen-Bradley SLC 500
- Input Channels: 2 isolated analog inputs
- Output Channels: 2 isolated analog outputs
- Input Signal Ranges: 0–20 mA, 4–20 mA, 0–5 V, 0–10 V, ±5 V, ±10 V (software selectable)
- Output Signal Ranges: 0–20 mA, 4–20 mA, 0–5 V, 0–10 V (software selectable)
- Resolution: 12-bit (0–4095 counts)
- Isolation: Channel-to-channel and channel-to-backplane isolated
- Backplane Current Draw: 150 mA @ 5 VDC
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Relative Humidity: 5% to 95% non-condensing
- Module Slot Width: Single-slot SLC 500 I/O chassis
- Certifications: UL, CSA, CE
Note: Always verify specifications against the official Rockwell Automation publication 1746-UM009 before engineering design.
Key Features & Benefits
- True Channel Isolation: Eliminates ground loops and common-mode noise — essential for long cable runs and multi-vendor field instrument environments.
- Flexible Signal Configuration: Software-selectable input and output ranges via RSLogix 500 — no hardware jumpers required, reducing commissioning time.
- 12-Bit Resolution: Provides 4096 discrete levels per channel, delivering the precision required for PID control, flow metering, and level measurement.
- Combination I/O in One Slot: Consolidates analog input and output functions into a single chassis slot, preserving valuable rack space in compact SLC 500 enclosures.
- Direct SLC 500 Backplane Integration: Native communication with SLC 5/01 through SLC 5/05 processors — no gateway or adapter required.
- Proven Field Reliability: Designed to Rockwell Automation’s industrial-grade standards with decades of deployment in harsh process environments.
Industry & Equipment Applications
- Oil & Gas: Wellhead pressure and flow monitoring, pipeline SCADA analog I/O, separator level control loops.
- Chemical Processing: Reactor temperature feedback, dosing pump control (4–20 mA output), pH and conductivity signal acquisition.
- Water & Wastewater Treatment: Pump VFD speed reference output, flow meter input, dissolved oxygen sensor interface.
- Power Generation: Turbine control analog feedback, generator excitation signal conditioning.
- Food & Beverage: CIP temperature monitoring, filling line pressure control, conveyor tension feedback.
- HVAC & Building Automation: Chiller control analog I/O, air handling unit damper positioning.
- OEM Machine Builders: Servo drive analog command interface, tension control systems, web guiding applications.
System Integration & Compatible Parts
The 1746-NIO4I is designed for seamless integration within the Allen-Bradley SLC 500 ecosystem. Compatible and commonly paired components include:
- SLC 500 Processors: 1747-L511, 1747-L514, 1747-L524, 1747-L531, 1747-L532, 1747-L541, 1747-L542, 1747-L543, 1747-L551, 1747-L552, 1747-L553
- SLC 500 I/O Chassis: 1746-A4, 1746-A7, 1746-A10, 1746-A13
- Power Supplies: 1746-P1, 1746-P2, 1746-P3, 1746-P4, 1746-P7
- Related Analog Modules: 1746-NI4, 1746-NO4I, 1746-NI8, 1746-NO4V, 1746-NIO4V
- Programming Software: RSLogix 500 (v8.0 or later recommended)
- Communication Modules: 1747-SDN (DeviceNet), 1747-KE (DH-485), 1747-SCNR (ControlNet)
Our Quality Assurance Process
At Konmask.com, every Allen-Bradley 1746-NIO4I module undergoes a rigorous multi-stage verification process before shipment:
- Authenticity Verification: Visual inspection of Rockwell Automation labeling, date codes, and firmware revision markings against known-genuine references.
- Physical Inspection: Examination of PCB condition, connector integrity, and housing for signs of repair, remanufacture, or counterfeit indicators.
- Functional Testing: Where applicable, modules are bench-tested in an SLC 500 chassis to verify backplane communication and I/O channel response.
- Traceability Documentation: Each unit is logged with inspection records available upon request for regulated industries.
- Secure Packaging: ESD-safe packaging with moisture barrier bags and shock-absorbing materials for international freight.
How to Order
Ordering the Allen-Bradley 1746-NIO4I from Konmask.com is straightforward:
- Step 1 — Submit an Inquiry: Use the contact form or email support@konmask.com with your required quantity, delivery timeline, and destination country.
- Step 2 — Receive a Quote: Our technical sales team will respond within 1 business day with pricing, lead time, and stock availability.
- Step 3 — Confirm & Pay: We accept T/T (bank transfer), PayPal, and other B2B payment methods. Pro-forma invoice provided upon order confirmation.
- Step 4 — Ship & Track: We ship via DHL, FedEx, UPS, or freight forwarder. Full tracking information and commercial invoice provided for customs clearance.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, and industrial control components — not a generalist distributor.
- Global B2B Supply: Serving engineering firms, system integrators, and maintenance teams across 50+ countries.
- Technical Support: Our team includes engineers with hands-on SLC 500 experience who can assist with compatibility and application questions.
- Competitive Lead Times: Extensive supplier network enables fast sourcing for both common and obsolete Allen-Bradley parts.
- Transparent Communication: No hidden fees. Clear quotations, honest lead times, and responsive after-sales support.
Frequently Asked Questions
Q: What is the difference between the 1746-NIO4I and the 1746-NIO4V?
A: The 1746-NIO4I provides channel-to-channel and channel-to-backplane isolation, making it suitable for environments with ground potential differences or where signal integrity is critical. The 1746-NIO4V is a non-isolated version with voltage-only outputs, typically used in less demanding applications.
Q: Is the 1746-NIO4I compatible with all SLC 500 processors?
A: Yes, the 1746-NIO4I is compatible with all SLC 5/01 through SLC 5/05 processors. It occupies one slot in any standard SLC 500 I/O chassis (1746-A4 through 1746-A13).
Q: Can I configure the input and output ranges independently?
A: Yes. Each channel’s signal range is configured independently via the I/O configuration table in RSLogix 500. No hardware jumper changes are required.
Q: Do you supply new, refurbished, or surplus units?
A: Konmask.com supplies both new-in-box and tested surplus units depending on availability. The condition is clearly stated in the quotation. All units pass our quality assurance process regardless of condition.
Q: What documentation can you provide with the module?
A: We can provide a commercial invoice, packing list, and inspection report. The official Rockwell Automation user manual (publication 1746-UM009) is publicly available from Rockwell’s literature library.
Q: How long does shipping take to my country?
A: Express courier (DHL/FedEx) typically delivers within 3–7 business days to most destinations. Sea freight and economy air options are available for larger orders.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
{
“@context”: “https://schema.org”,
“@graph”: [
{
“@type”: “Product”,
“name”: “Allen-Bradley 1746-NIO4I Analog Input/Output Module”,
“description”: “Allen-Bradley 1746-NIO4I SLC 500 isolated analog combination module with 2 analog inputs and 2 analog outputs, 12-bit resolution, channel-to-channel isolation, software-selectable signal ranges.”,
“brand”: {
“@type”: “Brand”,
“name”: “Allen-Bradley”
},
“model”: “1746-NIO4I”,
“sku”: “1746-NIO4I”,
“mpn”: “1746-NIO4I”,
“category”: “Analog I/O Module”,
“url”: “https://konmask.com/products/allen-bradley-1746-nio4i-analog-input-output-module-slc500”,
“offers”: {
“@type”: “Offer”,
“url”: “https://konmask.com/products/allen-bradley-1746-nio4i-analog-input-output-module-slc500”,
“priceCurrency”: “USD”,
“availability”: “https://schema.org/InStock”,
“seller”: {
“@type”: “Organization”,
“name”: “Konmask.com”
}
}
},
{
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “What is the difference between the 1746-NIO4I and the 1746-NIO4V?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1746-NIO4I provides channel-to-channel and channel-to-backplane isolation, making it suitable for environments with ground potential differences. The 1746-NIO4V is a non-isolated version with voltage-only outputs.”
}
},
{
“@type”: “Question”,
“name”: “Is the 1746-NIO4I compatible with all SLC 500 processors?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes, the 1746-NIO4I is compatible with all SLC 5/01 through SLC 5/05 processors and occupies one slot in any standard SLC 500 I/O chassis.”
}
},
{
“@type”: “Question”,
“name”: “Can I configure the input and output ranges independently?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. Each channel’s signal range is configured independently via the I/O configuration table in RSLogix 500. No hardware jumper changes are required.”
}
},
{
“@type”: “Question”,
“name”: “Do you supply new, refurbished, or surplus units?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Konmask.com supplies both new-in-box and tested surplus units depending on availability. The condition is clearly stated in the quotation.”
}
},
{
“@type”: “Question”,
“name”: “How long does shipping take?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Express courier (DHL/FedEx) typically delivers within 3–7 business days to most destinations. Sea freight and economy air options are available for larger orders.”
}
}
]
}
]
}
