Allen-Bradley 1756-OB16 ControlLogix DC Output Module
$123.00
$320.00
Description
Product Description
The 1756-OB16 is a standard DC digital output module for ControlLogix systems, providing 16 sourcing (PNP) outputs for controlling field devices in industrial automation environments. Developed by Allen-Bradley, this module is designed for consistent switching performance and reliable operation in 24V DC control systems.
The module interfaces directly with the ControlLogix backplane, enabling communication with the controller while delivering output signals to connected loads such as solenoids, relays, and indicator devices. It integrates built-in protection mechanisms and diagnostic capabilities, ensuring dependable system operation and simplified troubleshooting.
The 1756-OB16 is optimized for general-purpose discrete output tasks where channel isolation is not required but stable performance and efficient load handling are essential.
Key Functional Characteristics
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16 sourcing DC outputs for industrial control applications
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Designed for 24V DC systems with wide operating range
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Fast switching suitable for typical machine control tasks
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Integrated protection against short-circuit and overcurrent conditions
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Backplane communication with controller for diagnostics and status monitoring
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Compatible with standard removable terminal blocks
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley |
| Model | 1756-OB16 |
| Product Type | DC Digital Output Module |
| Product Family | ControlLogix |
| Number of Outputs | 16 |
| Output Type | Sourcing (PNP) |
| Nominal Voltage | 24 V DC |
| Operating Voltage Range | 10–31.2 V DC |
| Current per Output | 0.5 A max |
| Current per Module | 8 A @ 30°C; 4 A @ 60°C |
| Surge Current | 2 A for 10 ms (repeatable) |
| OFF-State Leakage Current | ≤ 0.5 mA |
| ON-State Voltage Drop | ≤ 1.2 V DC |
| Backplane Current | Approx. 75 mA @ 5.1 V; 2 mA @ 24 V |
| Power Dissipation | Approx. 2.5–3.3 W |
| Isolation Voltage | 250 V continuous (field to backplane) |
| Channel Isolation | No (grouped design) |
| Protection Features | Short-circuit, overcurrent, thermal shutdown |
| Terminal Block | 36-pin removable RTB |
| Compatible RTBs | 1756-TBCH, 1756-TBNH |
| Slot Width | 1 slot |
| Operating Temperature | 0°C to 60°C |
| Enclosure | Open-style (panel mounting required) |
Application Scenarios
The 1756-OB16 is widely used in automation systems where multiple discrete outputs must be controlled efficiently. Typical applications include driving relays, solenoid valves, stack lights, and contactors in manufacturing, packaging, and material handling systems.
It is particularly suitable for applications where high channel density and reliable switching are required without the need for channel-to-channel isolation.
FAQ
Is the 1756-OB16 suitable for inductive loads?
Yes, but external suppression components such as flyback diodes are recommended to protect the outputs.
Does this module provide channel isolation?
No, the outputs are not individually isolated. For isolation requirements, consider models like OB16I or OB16E.
What type of outputs does it provide?
The 1756-OB16 provides sourcing (PNP) outputs, supplying voltage to the load.
How is it installed?
It is inserted into any slot of a ControlLogix chassis and connects via a removable terminal block.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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