Product Overview

The Allen-Bradley 1746-NO8V is an analog output module for SLC 500 systems. This module has 8 single-ended analog output channels. It delivers voltage outputs up to ±10.25V DC. The module controls modulating devices like valves and VFDs. Resolution is 16-bit with 320 µV per count. Overall accuracy is 0.1% of full scale at 25°C. This module fits any 1746 chassis slot except slot 0.

For inquiries, contact us at +86 158 8020 0923 (WhatsApp).

Part Number Breakdown (Tree Structure)

• 1746 → Series Family
  • SLC 500 I/O module family
  • Allen-Bradley / Rockwell Automation
• NO → Product Type
  • Analog Output Module
• 8V → Channel Count and Signal Type
  • 8 output channels
  • Voltage output type

Key Specifications

• Brand: Allen-Bradley / Rockwell Automation
• Part Number: Allen-Bradley 1746-NO8V
• Series: SLC 500
• Module Type: Analog output module
• Number of Outputs: 8 single-ended channels
• Output Wiring: Single-ended
• Resolution: 16-bit (320 µV per count)
• Output Coding: -32,768 to +32,767

Output Voltage Ranges

• -10 to +10 VDC
• -10.25 to +10.25 VDC (with over-range)
• 0 to 10 VDC
• 0 to 5 VDC
• 1 to 5 VDC

Accuracy and Drift

• Accuracy at 25°C: 0.1% of full scale
• Accuracy at 60°C: 0.2% of full scale
• Accuracy Drift: ±33 ppm per °C of full scale
• Gain Error: 0.15%
• Offset Drift: ±0.53 LSB per °C

Output Characteristics

• Output Impedance: Less than 1 Ω
• Over-range Capability: 2.5% (±10.25V range)
• Load Range: 1 kΩ or greater
• Maximum Load Current: 10 mA
• Output Step Response: 1 ms (0 to 95% of full scale)

Update and Response Times

• Channel Update Time (Class 1): 5 ms for all 8 channels
• Channel Update Time (Class 2): 10 ms for all 8 channels
• Module Update Time: 540 microseconds per 8 channels
• Step Response (Input): 60 milliseconds
• Step Response (Output): 2.5 milliseconds

Power Consumption

• Backplane Current (5V DC): 120 mA
• Backplane Current (24V DC): 160 mA (J4 jumper set to RACK)
• Backplane Current (24V DC): 0 mA (J4 jumper set to EXT)
• Total Backplane Power: 5.6 Watts

SLC Data Formats (Configurable per Channel)

• Scaled engineering units
• Scaled for PID
• Proportional counts
• 1746-NO4 format
• User-defined scale

Optional Output Parameters

• User defined scale limits
• Output clamping limit
• Output alarm limits
• Ramp rate and limit
• Preset fault value
• Output behavior under fault (reset, hold, preset)
• Alarms latch function
• Reset latched alarms

Isolation and Protection

• Circuit Isolation: Between field wiring and backplane
• Test Voltage: 500V DC
• Isolation protects the chassis and processor.
• LED indicators show module and channel status.

Environmental Specifications

• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Relative Humidity: 5% to 95% non-condensing
• Operational Shock: 30g
• Vibration: 5g at 10 to 500 Hz

Certifications

• cUL certified
• CE certified
• Class I, Division 2 Hazardous Locations

Digital to Analog Conversion

• Built-in R-2R ladder network for DAC conversion
• Provides high accuracy and stability
• 16-bit resolution ensures fine control

Compatible Field Devices

• Modulating control valves
• Variable Frequency Drives (VFD)
• Dampers and louvers
• Analog actuators
• Chart recorders
• Other devices needing 0-10V or ±10V signals

Installation Guide

• Turn off all power before installation.
• Remove power from the SLC 500 chassis completely.
• Insert the Allen-Bradley 1746-NO8V into any slot except slot 0.
• Press firmly until the module seats in the backplane.
• Set the J4 jumper for internal rack power or external 24V supply.
• Wire output channels to field devices using shielded cable.
• Connect loads of 1 kΩ or greater only.
• Do not exceed 10 mA load current per channel.
• Apply power and check module LED indicators.
• Configure output parameters using your programming software.

Jumper Configuration (J4)

• J4 set to RACK: Uses backplane 24V power (160 mA draw)
• J4 set to EXT: Uses external 24V power (0 mA backplane draw)
• Choose based on your system power budget.

Maintenance Tips

• Check output voltages annually against known standards.
• Monitor load current (do not exceed 10 mA per channel).
• Inspect field wiring for damage or loose connections.
• Keep the module free from dust and moisture.
• Verify accuracy drift stays within ±33 ppm per °C.
• Replace module if outputs become unstable.

Application Scenarios

• Process control with modulating valves
• VFD speed control in conveyor systems
• HVAC damper position control
• Pressure regulator setpoint control
• Temperature control loops with analog actuators
• Test equipment signal generation

Package Contents

• One Allen-Bradley 1746-NO8V analog output module
• One product label

Warranty and Shipping

• 12 months factory warranty from shipment date.
• Warranty covers manufacturing defects only.
• Overload or short circuit voids the warranty.
• Shipping options: FedEx, UPS, DHL.
• Tracking number provided after shipment.

Frequently Asked Questions (FAQ)

Q1: How many analog outputs does the 1746-NO8V have?

The Allen-Bradley 1746-NO8V has 8 single-ended analog outputs. Each channel is configurable for different voltage ranges. Resolution is 16-bit across all channels.

Q2: What voltage ranges does this module support?

Supported ranges include ±10V, ±10.25V, 0-10V, 0-5V, and 1-5V. The ±10.25V range provides 2.5% over-range capability. Choose the range that matches your field device requirements.

Q3: What is the accuracy of the 1746-NO8V?

Accuracy is 0.1% of full scale at 25°C. At 60°C, accuracy is 0.2% of full scale. Drift is ±33 ppm per °C of full scale. Gain error is 0.15%.

Q4: What is the maximum load current per output?

Maximum load current is 10 mA per channel. Load resistance must be 1 kΩ or greater. Do not exceed these values to avoid damage.

Q5: Can this module be used in hazardous locations?

Yes, this module is cUL and CE certified for Class I, Division 2 hazardous locations. Always follow local installation codes. Verify your specific area classification before installation.

Buying Guide

When you buy an Allen-Bradley 1746-NO8V analog output module, follow these tips. First, count your analog output needs. This module gives 8 channels. Second, verify your voltage range. Match the range to your field device. Third, check your load resistance. Must be 1 kΩ or greater. Fourth, calculate your load current. Do not exceed 10 mA per channel. Fifth, decide on power source. Use rack power or external 24V supply. Sixth, set the J4 jumper accordingly. Seventh, consider your accuracy needs. This module provides 0.1% accuracy. Eighth, verify your SLC 500 chassis has a slot except slot 0. Ninth, review warranty terms. We offer 12 months coverage. Tenth, choose your shipping method. We use FedEx, UPS, and DHL. Finally, test each channel with a dummy load before connecting expensive field devices.

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