Genuine Allen-Bradley 1746-NOI4I SLC 500 - Industrial Automation Part

AB 1746-NOI4I Analog Output Module | SLC 500 Series

Description

Allen-Bradley 1746-NOI4I Analog Output Module – SLC 500 Series

Picture a continuous casting line at 02:00 AM when the analog output signal to the hydraulic proportional valve drops to zero. The roller gap control loses its reference, the slab thickness drifts out of tolerance, and the entire heat must be scrapped — a six-figure loss before the morning shift arrives. That scenario is precisely why the 1746-NOI4I is not a commodity item on a shelf; it is the last line of defense between a controlled process and an uncontrolled one. When the module fails, there is no software workaround and no manual substitute: the loop is open, and the plant stops.

Within the SLC 500 family, the 1746-NOI4I occupies the position of the highest-channel-density isolated analog output card in the 1746 I/O chassis. Unlike the non-isolated 1746-NO4I, every channel on the NOI4I carries its own galvanic barrier, making it the correct choice wherever field devices share different ground references or where ground loops would otherwise corrupt the signal. Globally, the SLC 500 platform remains installed in tens of thousands of facilities across oil & gas, food processing, metals, and water treatment — and the 1746-NOI4I continues to be the preferred output module for retrofit and expansion projects where replacing the entire control system is not economically justified.

Technical Specifications

Electrical

Number of Output Channels: 4 (individually isolated)
Output Signal Ranges: 4–20 mA / 0–20 mA / 0–10 VDC / ±10 VDC (software-selectable per channel)
Resolution: 12-bit (1 in 4,095)
Accuracy: ±0.1% of full scale at 25 °C
Current Output Load: 0–750 Ω maximum
Voltage Output Load: ≥1 kΩ minimum
Isolation: 250 V AC channel-to-channel and channel-to-backplane
Backplane Current Draw: 250 mA @ 5 VDC; 75 mA @ 24 VDC
External Power Supply: 24 VDC ±10%, 150 mA per channel (field side)

Mechanical

Form Factor: Single-slot 1746 I/O module
Connector: 40-pin RTB (removable terminal block)
Approximate Weight: 300 g
Dimensions: Standard SLC 500 single-slot profile

Environmental

Operating Temperature: 0 °C to +60 °C
Storage Temperature: −40 °C to +85 °C
Relative Humidity: 5–95% non-condensing
Vibration: 2 g @ 10–500 Hz (IEC 68-2-6)
Shock: 30 g operational (IEC 68-2-27)

Certifications

UL Listed, CE Marked (EMC Directive), cUL
Compliant with IEC 61131-2 (Programmable Controllers — Equipment Requirements)

Key Features & Benefits

Per-channel galvanic isolation to 250 V AC — eliminates ground-loop interference in multi-drive or multi-transmitter installations, reducing signal noise to below 0.05% of span without external isolators
Software-selectable output type per channel — a single module covers both current and voltage field devices, cutting spare-parts inventory by up to 50% compared to maintaining separate current-only and voltage-only cards
12-bit resolution with ±0.1% full-scale accuracy — meets the signal fidelity requirements of IEC 61511 SIL 1 safety instrumented loops when used with a validated SLC 500 safety program
Removable terminal block (RTB) design — field wiring stays connected to the RTB during module swap, reducing mean time to repair (MTTR) to under 10 minutes without rewiring
Diagnostic fault reporting via SLC data table — open-wire and out-of-range conditions are flagged in the output image table, enabling the PLC program to trigger alarms before a process upset occurs
Direct compatibility with RSLogix 500 / Studio 5000 Logix Designer — no third-party driver or add-on instruction required; module configuration is embedded in the I/O tree, shortening commissioning time

Industry & Equipment Applications

Oil & Gas — Upstream & Midstream: Control valve positioners on wellhead choke manifolds; 4–20 mA setpoint to electro-pneumatic I/P converters on separator pressure control loops
Food & Beverage Processing: Speed reference output to VFDs on filling line conveyors; temperature setpoint to PID-controlled steam injection valves in pasteurization tunnels
Metals & Primary Processing: Hydraulic proportional valve control on rolling mill gap adjustment; tension reference to DC drive systems on coil winding lines
Water & Wastewater Treatment: Dosing pump speed control via 4–20 mA to chemical metering drives; valve position setpoint on effluent flow control stations
Pharmaceutical & Life Sciences: Bioreactor agitator speed reference; clean-in-place (CIP) flow control valve positioning in compliance with FDA 21 CFR Part 11 validated systems
Pulp & Paper: Basis weight control via slice lip actuator positioning; steam pressure setpoint to dryer section control valves

System Integration & Compatible Parts

Upstream (Controllers): SLC 5/03, SLC 5/04, SLC 5/05 processors; 1747-L531, 1747-L541, 1747-L551 CPU modules. The 1746-NOI4I occupies one slot in any 1746-A4, 1746-A7, 1746-A10, or 1746-A13 chassis.

Downstream (Field Devices): Any 4–20 mA or 0–10 VDC field device — Fisher DVC6200 digital valve controllers, Siemens SITRANS P transmitters (as setpoint receivers), ABB ACS880 drives (analog speed reference input), Endress+Hauser Promag flow transmitters.

Equivalent / Substitute Modules:

1746-NO4I — non-isolated version; acceptable substitute only when all four channels share a common field ground and ground loops are not a concern
1746-NO4V — voltage-only, non-isolated; suitable only for voltage-output applications with common ground
1756-OF4 (ControlLogix) — platform migration path when upgrading from SLC 500 to ControlLogix; requires chassis, power supply, and program conversion

Our Quality Assurance Process

Every 1746-NOI4I shipped from Konmask.com passes through a four-stage verification process:

Visual & Physical Inspection: Board-level examination for corrosion, damaged traces, bent connector pins, and label authenticity verification against Allen-Bradley factory markings
Functional Bench Test: Module is installed in a live SLC 500 chassis; all four channels are exercised across the full output range (4–20 mA and 0–10 V) using calibrated Fluke 789 ProcessMeter; accuracy is logged against the ±0.1% specification
Isolation Integrity Test: Channel-to-channel and channel-to-backplane isolation verified at 250 V AC using a Megger MIT400 insulation tester
Final Documentation & Packaging: Module is cleaned, anti-static bagged, and boxed with foam cushioning; test report is attached to the shipment

Available Documentation: Functional test report, inspection checklist, certificate of conformance (CoC), photos of physical condition, and Allen-Bradley datasheet reference.

How to Order

Submit Your Inquiry: Use the contact form on this page or email support@konmask.com with your required quantity, delivery timeline, and destination country
Receive Your Quote: Our technical team reviews stock availability and responds with pricing, lead time, and shipping options within 24 hours on business days
Confirm & Ship: Once you approve the proforma invoice, we arrange export documentation, packaging, and dispatch via your preferred freight method (DHL Express, FedEx, sea freight)

Why Choose Konmask.com?

Verified Stock, Not Dropshipping: We physically hold and test the modules we sell — no blind-forwarding from unknown third-party warehouses
Technical Pre-Sales Support: Our team can confirm compatibility with your specific SLC 500 chassis revision and firmware version before you commit to a purchase
Export-Ready Documentation: Commercial invoice, packing list, certificate of conformance, and country-of-origin declaration prepared for customs clearance in your destination market
Responsive Communication: Dedicated inquiry handling with a 24-hour response commitment — no automated bots, no ticket queues for standard inquiries
Long-Term Sourcing Partnership: We maintain relationships with multiple supply channels for obsolete and hard-to-find SLC 500 components, making us a reliable partner for ongoing MRO procurement

Frequently Asked Questions

Q: Can the Allen-Bradley 1746-NOI4I replace a 1746-NO4I in an existing SLC 500 system without program changes?
A: In most cases, yes. The 1746-NOI4I uses the same I/O image table structure as the 1746-NO4I, so the RSLogix 500 program typically requires only a module type update in the I/O configuration tree. The physical wiring may need adjustment if you intend to use the isolation barrier — each channel requires its own field power supply return. We recommend a bench test before installation in a live system.

Q: What is the lead time for the 1746-NOI4I and do you ship to Southeast Asia and the Middle East?
A: Lead time depends on current stock levels and is confirmed at the time of inquiry — typically 3–10 business days for in-stock units. We ship to all major markets including Singapore, Malaysia, Thailand, UAE, Saudi Arabia, and Qatar via DHL Express or FedEx International Priority. Export documentation is prepared as standard.

Q: How do I verify the 1746-NOI4I firmware revision and is it compatible with older SLC 5/03 processors?
A: The firmware revision is printed on the module label (Series A, B, or C). The 1746-NOI4I is compatible with SLC 5/03 (OS302 and later), SLC 5/04, and SLC 5/05 processors. Series A modules may have limitations with certain diagnostic features available in later processor firmware — our team can advise based on your specific processor catalog number and OS revision.

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AB 1746-NOI4I Analog Output Module | SLC 500 Series