The 1756-OB32 ControlLogix Digital DC Output Module from Rockwell Automation is a high-density 32-point 24V DC sourcing output module designed for industrial automation systems that require maximum channel density, fast switching performance, and reliable discrete control within a single ControlLogix slot.
This module is widely used in large-scale manufacturing systems, automotive production lines, packaging machines, and complex material handling systems where cabinet space is limited but a high number of output signals are required. By doubling the channel count compared to standard 16-point modules, the 1756-OB32 significantly improves system compactness and wiring efficiency.
It integrates seamlessly into the ControlLogix platform, delivering stable performance for high-density control architectures.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-OB32 |
| Series | ControlLogix Digital Output Modules |
| Module Type | 32-Point DC Sourcing Output Module |
| Number of Outputs | 32 outputs |
| Output Voltage Range | 10–31.2V DC |
| Nominal Voltage | 24V DC |
| Output Type | Transistor (sourcing) |
| Output Configuration | Multiple grouped outputs |
| Continuous Current per Point | 0.5–1.0 A (temperature dependent) |
| Continuous Current per Module | Up to 8 A total (derated) |
| Switching Time | ~0.7–1 ms typical |
| Short-Circuit Protection | Electronic protection (model dependent) |
| Isolation Voltage | 250V continuous |
| Backplane Current (5.1V DC) | ~250–400 mA |
| Power Dissipation | ~6–8 W |
| Field Power Requirement | External 24V DC supply required |
| Terminal Block | 1756-TBSH / 1756-TBNH (high-density variants) |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.45–0.80 kg |
Physical Dimensions
- Size (H × W × D): 145 × 35 × 140 mm
Despite doubling output density, the module retains the same single-slot ControlLogix footprint, making it highly space-efficient for large systems.
Recommended Related Models
The 1756-OB32 is commonly used with:
- 1756-IB32 high-density input module
- 1756-OB16 / OB16E DC output modules
- 1756-OA16 AC output modules
- 1756-OW16 relay output modules
- 1756-L71 / L73 ControlLogix CPUs
- 1756-EN2T EtherNet/IP communication modules
Popular Allen-Bradley ControlLogix Output Modules
Within the ControlLogix output family, commonly used models include:
- 1756-OB32 high-density DC output module
- 1756-OB16 standard DC output module
- 1756-OB16E electronically fused output module
- 1756-OB16D diagnostic output module
- 1756-OA16 AC output module
These modules allow scalable system design depending on density, protection, and load type requirements.
