Allen-Bradley 1746-OB8 SLC 500 Digital Output Module

The Allen-Bradley 1746-OB8 is an 8-point digital output module designed for use with SLC 500 control systems. This module offers reliable performance for controlling various devices in industrial automation environments. It is ideal for applications that require consistent digital output signals with sufficient current handling capabilities, making it a robust choice for a wide range of industrial tasks.

Advantages:

• Supports up to 8 digital output points for flexible device control
• Compact design suitable for SLC 500 chassis installations
• Reliable DC voltage outputs with high current capability
• Robust construction for demanding industrial environments

General Info

• Manufacturer: Allen-Bradley
• Model Number: 1746-OB8
• Type: SLC 500 Digital Output Module
• Number of Outputs: 8 points
• Output Voltage Range: 20.4V to 26.4V DC
• Maximum Output Current: 1 A per channel
• Compatibility: SLC 500 series
• Operating Temperature Range: 0°C to 60°C

Features

• 8 Digital Output Points: The module provides 8 output points, allowing for the control of various industrial devices such as actuators, relays, and indicators. Each output can handle a maximum current of 1 A, providing flexibility in controlling devices with varying power requirements.

• Wide Voltage Range: The 1746-OB8 supports an output voltage range of 20.4V to 26.4V DC, making it suitable for a wide range of DC-powered devices. The module is capable of maintaining stable output within this voltage range, ensuring reliable device control.

• High Current Capability: Each channel can handle up to 1 A of current, allowing the module to control devices with moderate power requirements without the need for additional amplification or interfacing.

• Robust Environmental Tolerance: Designed to operate in harsh industrial environments, the module is rated for temperatures from 0°C to 60°C and can be stored in temperatures as low as -40°C and as high as 85°C. It also supports a relative humidity range of 5% to 95%, non-condensing.

• LED Status Indicators: Each output point is equipped with an LED status indicator, providing a visual indication of the current status of each output. This feature simplifies troubleshooting and system diagnostics, allowing operators to quickly identify issues.

Technical Specifications

• Electrical Specifications:

  • Output Voltage Range: 20.4V to 26.4V DC
  • Nominal Output Voltage: 24V DC
  • Maximum Output Current per Channel: 1 A
  • Current per Module: 8 A total (maximum)
  • Off-state Leakage Current: ≤ 1 mA per channel
  • On-state Voltage Drop: ≤ 1.0V at maximum current
  • Surge Current per Channel: 2 A for 10 ms, repeatable every 1 s
  • Output Delay Time:
    • Turn ON: ≤ 0.1 ms
    • Turn OFF: ≤ 1.0 ms

• Mechanical Specifications:

  • Dimensions:
    • Height: 130 mm (5.12 in)
    • Width: 35 mm (1.38 in)
    • Depth: 145 mm (5.71 in)
  • Weight: 0.23 kg (0.5 lb)
  • Mounting Method: SLC 500 chassis mountable

• Environmental Specifications:

  • Operating Temperature Range: 0°C to 60°C (32°F to 140°F)
  • Storage Temperature Range: -40°C to 85°C (-40°F to 185°F)
  • Relative Humidity: 5% to 95% (non-condensing)
  • Vibration:
    • Operating: 5G, 10 to 500 Hz (IEC 60068-2-6)
  • Shock:
    • Operating: 30G peak (IEC 60068-2-27)
    • Non-operating: 50G peak (IEC 60068-2-27)

• Protection Features:

  • Overvoltage Protection: Integrated protection up to 30V DC
  • Short Circuit Protection: Built-in protection to handle accidental short circuits without module damage

• Performance Specifications:

  • Output Type: Sinking output
  • Backplane Current Consumption:
    • 5V DC: 100 mA
  • Power Dissipation: 2.4 W (maximum)
  • Thermal Dissipation: 8.2 BTU/hr (maximum)

• LED Indicators:

  • Status Indicators: 8 individual LEDs for each output channel to show ON/OFF status

• Compliance and Certifications:

  • Certifications: UL Listed, CE Marked, CSA Certified
  • Safety Standards:
    • EN 61131-2 (Programmable controllers - Part 2: Equipment requirements and tests)
  • EMC Compliance: EN 61326-1, EN 61000-6-2, EN 61000-6-4
  • Hazardous Location Ratings: Class I, Division 2, Groups A, B, C, D