Allen-Bradley 1746-NO4V SLC 500 4-Point Analog Output Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1746-NO4V is a 4-point voltage analog output module designed for the Rockwell Automation SLC 500 programmable controller platform. It delivers precise ±10 VDC or 0–10 VDC analog signals to field devices such as drives, valves, and positioners. This page provides full technical specifications, compatible replacement options, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
- Part Number: 1746-NO4V
- Manufacturer: Allen-Bradley / Rockwell Automation
- Series: SLC 500 (1746 I/O)
- Output Type: Voltage Analog Output
- Number of Channels: 4
- Output Range: ±10 VDC / 0–10 VDC (software selectable per channel)
- Resolution: 12-bit (1 in 4,095)
- Load Impedance: ≥ 1 kΩ
- Isolation: 1,500 VAC (field side to backplane)
- Power Consumption: 120 mA @ 5 VDC (backplane); 0 mA @ 24 VDC
- Operating Temperature: 0 °C to 60 °C (32 °F to 140 °F)
- Storage Temperature: -40 °C to 85 °C
- Relative Humidity: 5–95% non-condensing
- Dimensions (H × W × D): 111 × 40 × 87 mm (approx.)
- Weight: ~500 g
- Certifications: UL, CE, CSA
- Compatible Backplane: SLC 500 fixed and modular chassis (1746-A4, 1746-A7, 1746-A10, 1746-A13)
Compatible Replacement & Equivalent Models
When the original 1746-NO4V is unavailable or end-of-life, the following models offer functional equivalence or direct drop-in replacement capability:
- 1746-NO4I — Allen-Bradley SLC 500 4-point current analog output (4–20 mA); use when field wiring requires current loop instead of voltage.
- 1746-NIO4V — Allen-Bradley SLC 500 4-point combination analog I/O (2 in / 2 out voltage); suitable when mixed I/O density is preferred.
- 1746-NIO4I — Allen-Bradley SLC 500 4-point combination analog I/O (current); alternative for current-based mixed I/O.
- PROSOFT MVI46 series — Third-party protocol gateway modules for SLC 500; not a direct output replacement but extends system capability.
- Spectrum Controls 1746-series analog modules — Third-party drop-in compatible analog I/O for SLC 500 backplane; verify firmware compatibility before ordering.
Note: Always verify backplane slot compatibility, firmware revision, and RSLogix 500 configuration before substituting modules.
Why Choose the Original 1746-NO4V
- Native RSLogix 500 integration — Zero configuration overhead; module is auto-detected by SLC 500 processor.
- Proven field reliability — Widely deployed in manufacturing, oil & gas, and water treatment since the 1990s.
- Guaranteed backplane compatibility — Designed and tested for all SLC 500 chassis variants.
- Rockwell Automation support — Full documentation, firmware, and technical support available through official channels.
- Stable signal quality — 12-bit resolution with hardware-level isolation minimizes noise in demanding industrial environments.
Typical Applications
- Variable frequency drive (VFD) speed reference control
- Proportional valve and actuator positioning
- Temperature setpoint transmission to PID controllers
- Conveyor speed regulation in packaging and material handling
- Pump flow rate control in water/wastewater treatment
- Analog setpoint output in HVAC and building automation systems
System Compatibility
- Controller Platform: SLC 500 (SLC 5/01, 5/02, 5/03, 5/04, 5/05)
- Programming Software: RSLogix 500 / Studio 5000 (legacy mode)
- Chassis: 1746-A4, 1746-A7, 1746-A10, 1746-A13
- Power Supply: 1746-P1, 1746-P2, 1746-P3, 1746-P4, 1746-P7
- Not compatible with: ControlLogix (1756), CompactLogix (1769), MicroLogix 1100/1400 platforms
Selection Guide
Use the following criteria to confirm the 1746-NO4V is the correct module for your application:
- Output signal type: Requires voltage output (±10 V or 0–10 V)? → 1746-NO4V ✓ | Requires current output (4–20 mA)? → Select 1746-NO4I instead.
- Channel count: Need exactly 4 output channels? → 1746-NO4V ✓ | Need fewer channels? → Consider 1746-NIO4V for mixed I/O.
- Platform: Running SLC 500 backplane? → 1746-NO4V ✓ | Running ControlLogix? → Select 1756-OF4 or 1756-OF8 instead.
- Load impedance: Field device input impedance ≥ 1 kΩ? → 1746-NO4V ✓ | Lower impedance loads require a signal conditioner.
- Resolution requirement: 12-bit sufficient? → 1746-NO4V ✓ | Need 16-bit? → Evaluate 1746-NIO4V or third-party alternatives.
Quality Assurance & Sourcing
- All units sourced from authorized distributors or verified surplus channels with full traceability.
- Pre-shipment functional testing available on request.
- Original factory packaging preserved where possible; refurbished units clearly labeled.
- Counterfeit risk mitigation: serial number and date code verification performed on every unit.
- Export compliance: ECCN classification reviewed for international shipments.
How to Order
- Confirm your SLC 500 chassis model and available slot count.
- Verify RSLogix 500 project configuration supports the 1746-NO4V module definition.
- Select quantity and contact us for volume pricing or expedited availability.
- Provide your shipping address and preferred freight method at checkout.
- For urgent requirements, email support@konmask.com or call +0086 19859288691.
Replacement & Compatibility FAQ
Q: Can the 1746-NO4V replace the 1746-NO4I directly?
A: No. The NO4V outputs voltage (±10 V / 0–10 V) while the NO4I outputs current (4–20 mA). Field wiring and device input specifications must match the signal type.
Q: Is the 1746-NO4V compatible with ControlLogix or CompactLogix?
A: No. The 1746 series is exclusive to the SLC 500 backplane. For ControlLogix, use the 1756-OF series; for CompactLogix, use the 1769-OF series.
Q: Can I use a third-party equivalent in my SLC 500 chassis?
A: Yes, with caution. Spectrum Controls and other vendors offer SLC 500-compatible analog modules. Verify the module catalog number in RSLogix 500 and test in a non-production environment first.
Q: What is the lead time for the 1746-NO4V?
A: Stock availability varies. Contact us for real-time inventory status. Expedited sourcing is available for critical downtime situations.
Q: Does Konmask.com provide a warranty?
A: Yes. All modules carry a minimum 90-day functional warranty. Extended warranty options are available upon request.
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Contact: support@konmask.com | +0086 19859288691
