Excellent PLC
Product Introduction
The Allen-Bradley 1746-OBP8/B is a high-current DC digital output module designed for the SLC 500 PLC platform. As a Series B version, it offers improved performance and reliability over earlier revisions, making it well-suited for demanding industrial applications requiring higher output current capacity.
This module provides 8 sourcing output channels, organized into two groups of 4 points each (4 points per common). It operates on a nominal 24V DC supply (20.4–26.4V DC range) and is specifically engineered for high-current output applications, capable of delivering up to 2.0 A per channel. This makes it ideal for directly driving high-power DC loads such as solenoids, contactors, and actuators without the need for interposing relays in many cases.
The 1746-OBP8/B does not include internal electronic protection, allowing for higher current delivery but requiring proper external protection design. Its screw terminal configuration ensures robust and secure field wiring, which is essential in harsh industrial environments.
Product Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Allen-Bradley |
| Series | SLC 500 |
| Module Type | DC Digital Output Module |
| Catalog Number | 1746-OBP8/B |
| Series Version | Series B |
| Module Classification | High-Current Output Module |
| Number of Channels | 8 Outputs |
| Output Type | DC Transistor Output (Sourcing) |
| Output Voltage Range | 20.4–26.4V DC |
| Nominal Voltage | 24V DC |
| Max Current per Channel | 2.0 A |
| Channel Grouping | 4 Points per Common (2 Groups) |
| Output Configuration | High-current sourcing outputs |
| Protection | No Electronic Protection |
| Connection Type | Screw Terminal |
| Backplane Current Consumption | Approx. 0.12 A |
| Isolation | Group isolation (backplane to field) |
| Operating Temperature | 0 to 60°C |
| Storage Temperature | -40 to 85°C |
| Installation | SLC 500 Chassis |
| Wiring Category | Category 1 |
| Dimensions | 144.5 × 34.6 × 130.18 mm |
| Weight | 0.45 kg |
Applications
● High-Power DC Load Control
Directly drives high-current devices such as solenoids, DC contactors, and actuators.
● Industrial Automation Systems
Used in control panels where high-current switching is required without intermediate relays.
● Material Handling & Heavy Equipment
Controls motors, braking systems, and high-load actuators in conveyors and lifting systems.
● Process Control Systems
Suitable for industries requiring robust and reliable DC output control.
● Custom High-Load Architectures
Ideal for systems designed with external protection and tailored load management.
Advantages
● Very High Output Current (2.0 A per Channel)
Significantly higher than standard modules, enabling direct load driving.
● Efficient Grouping Design
4 outputs per common simplifies wiring and improves load balancing.
● Improved Series B Reliability
Enhanced stability and durability compared to earlier versions.
● Reduced Need for External Relays
Can directly control high-current loads, lowering system complexity.
● Secure Screw Terminal Connections
Ensures stable and vibration-resistant wiring.
● Optimized for 24V DC Systems
Perfectly suited for standard industrial power architectures.
