Product Overview

The Allen-Bradley 1746-OB16E is a digital DC output module for the SLC 500 system. This module provides 16 sourcing outputs at 10 to 30V DC. It features electronic fusing for reliable protection. The Allen-Bradley 1746-OB16E uses a removable terminal block for easy wiring. Users trust this module for high-current industrial output applications.

Technical Specifications

The 1746-OB16E delivers robust digital output performance with electronic protection. Below are the complete technical details.

General Specifications

• Manufacturer: Rockwell Automation for industrial control reliability.

• Brand: Allen-Bradley for SLC 500 compatibility.

• Part Number: 1746-OB16E for precise identification.

• Series: SLC 500 programmable controller family.

• Module Type: Digital DC Output Module.

• Applications: High Current industrial outputs.

• UPC: 10662072720414 for universal product identification.

• UNSPSC: 32151705 for classification.

Voltage and Current Specifications

• Voltage Range: 10 to 30 Volts DC Source (sourcing outputs).

• Outputs: 16 sourcing outputs.

• Current per Output: 1 Amp or 0.5 Amps (depending on conditions).

• Current per Module (30°C): 8 Amps (9 Amps maximum).

• Backplane Current (5 Volts): 135 milliamps.

• Minimum Load per Point: 1 mA.

• Inrush Current per Point: 2.0 A for 2 ms repeating every 1s at 30°C.

Output Performance

• Step Response (In): 60 milliseconds.

• Step Response (Out): 2.5 milliseconds.

• Signal Delay (ON Mode): 1 ms load-dependent.

• Signal Delay (OFF Mode): 1 ms load-dependent.

• Maximum Output Current Leakage (OFF State): 1 mA.

Protection Features

• Electronic Fusing: Built-in for output protection.

• Protection Type: Electronically-fused 24V DC signal output.

• No Physical Fuse Replacement: Electronic reset capability.

Thermal Specifications

• Heat Dissipation per Output Point: 0.388 W.

• Aggregate Heat Dissipation (Module): 7.6 W.

• Total Thermal Load: Manageable for SLC 500 systems.

Physical and Connection Features

• Removable Terminal Block (RTB): For easy wiring and replacement.

• Chassis Compatibility: Fits any available slot in 1746 Chassis.

• Single Slot: Occupies one SLC 500 chassis slot.

Environmental Specifications

• Operating Temperature: 0 to 60°C (32 to 140°F).

• Relative Humidity: 5 to 95% without condensation.

• Noise Immunity Rating: NEMA ICS 2-230 rated.

• Operational Vibration: 2.5G at 10 to 200 Hz.

• Operational Shock: 30G rating.

Installation Guide

Follow these steps to install the Allen-Bradley 1746-OB16E correctly.

1. Power Down the Chassis: Turn off all power to the SLC 500 rack.

2. Locate an Available Slot: Find any empty I/O slot in the 1746 chassis.

3. Insert the Module: Slide the 1746-OB16E into the slot carefully.

4. Secure the Module: Lock using the retaining clips at top and bottom.

5. Wire Removable Terminal Block: Connect loads to the RTB for each output.

6. Apply DC Power: Connect 10 to 30V DC source to the common terminals.

7. Verify Polarity: Sourcing outputs require proper DC polarity.

8. Check Load Current: Ensure each output stays within 1 Amp or 0.5 Amps.

9. Calculate Total Current: Keep module total under 8 Amps at 30°C.

10. Insert RTB: Plug the wired terminal block into the module front.

11. Apply Backplane Power: Turn on the chassis power.

12. Test Outputs: Energize each output and verify operation.

13. Monitor Leakage Current: Check OFF-state leakage stays below 1 mA.

14. Verify Inrush Capability: Test high inrush loads (2.0A for 2 ms).

15. Check LED Status: Observe output indicators for each channel.

Installation Notes

• The module draws 135 mA from the 5V backplane only.

• Electronic fusing eliminates physical fuse replacement.

• Signal delay is approximately 1 ms for both ON and OFF.

• Heat dissipation is 0.388W per output point (7.6W total).

• The removable terminal block allows easy module replacement.

Packaging List

This unit ships as a new and original product.

• Allen-Bradley 1746-OB16E Digital DC Output Module

• Removable terminal block (RTB)

• Product data sheet with wiring diagram

• Anti-static factory packaging bag

Frequently Asked Questions (FAQ)

1. How many outputs does the 1746-OB16E provide?
The Allen-Bradley 1746-OB16E provides 16 sourcing DC outputs. The operating voltage range is 10 to 30V DC.

2. What is the current rating per output on this module?
The 1746-OB16E has a current rating of 1 Amp or 0.5 Amps per output. Total module current is 8 Amps at 30°C (9 Amps maximum).

3. Does this module use physical fuses for protection?
No, the Allen-Bradley 1746-OB16E features electronic fusing. This eliminates the need for physical fuse replacement.

4. What is the signal delay time for the 1746-OB16E?
The 1746-OB16E has a load-dependent signal delay of approximately 1 ms for both ON and OFF modes. Step response is 60 ms in and 2.5 ms out.

5. What type of terminal block does this module use?
The Allen-Bradley 1746-OB16E uses a removable terminal block (RTB). This allows easy wiring and module replacement without rewiring.