Excellent PLC
Product Introduction
The Allen-Bradley 1756-OB8 is a ControlLogix DC digital output module designed for applications requiring reliable DC switching, moderate output current, and seamless integration within ControlLogix systems. As part of the ControlLogix I/O family, this module provides high performance for controlling industrial DC loads while maintaining predictable behavior across all channels.
The 1756-OB8 is commonly deployed in industrial control environments where compact size, channel-level current sourcing, and stable DC output operation are essential. Its design includes isolation and efficient power management, making it suitable for automation systems with multiple output requirements and sensitive control electronics.
Product Specifications
| Parameter | Description |
|---|---|
| Product Type | ControlLogix DC Digital Output Module |
| Output Type | DC Digital Output |
| Number of Outputs | 8 channels |
| Output Configuration | Current sourcing |
| Rated Output Voltage | 12 / 24 VDC |
| Output Current per Channel | 2 A sourcing |
| Isolation Voltage | 50 V continuous |
| Total Backplane Power | 0.89 W |
| Power Dissipation (max) | 2.5 W at 60 °C |
| Signal Switching | Electronic DC switching |
| Chassis Compatibility | ControlLogix chassis |
| Control Platform | ControlLogix automation system |
| Industrial Rating | Designed for industrial control environments |
| Dimensions | 144.5 × 34.6 × 130.18 mm |
| Weight | 0.34 kg |
Applications
• Used for control of DC actuators and devices, including solenoid valves, relays, and small interface modules
• Suitable for automation systems requiring moderate current sourcing per channel
• Applied in process control and manufacturing lines where compact output modules are preferred
• Commonly installed in material handling, packaging, and assembly systems
• Ideal for applications that require efficient power usage and low thermal dissipation
Advantages
• 2 A per channel sourcing enables reliable control of medium-power DC devices
• 8-channel density balances output capacity with compact module size
• 50 V isolation voltage provides protection against electrical interference and backplane disturbances
• Low total backplane power and dissipation reduce heating and improve cabinet thermal management
• Seamless ControlLogix integration allows easy configuration, diagnostics, and monitoring
• Designed for stable operation in electrically noisy industrial environments
