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Allen-Bradley

756-OB16EK | Allen Bradley | ControlLogix Digital Output Module

SKU 756-OB16EK

  • Part Number:

    756-OB16EK

  • Manufacturer:

    Allen-Bradley

  • Condition:

    Brand New & in Stock

  • Product Type:

    Digital Output Module

  • Origin:

    USA

  • Shipping Detail:

    Fedex and UPS etc

  • Warranty:

    12 months

Frequently inquire Together

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Allen-Bradley 1756-OB16EK ControlLogix Digital Output Module

The Allen-Bradley 1756-OB16EK, also cataloged as the 1756-OB16EK digital output module, provides 16 electronically fused DC output points for ControlLogix systems, supporting deterministic switching and redundancy in industrial automation.

Hardware Specifications

Parameter Specification
Model 1756-OB16EK
Brand Allen-Bradley
Origin USA
Weight Not specified
Dimensions Standard ControlLogix slot width
Operating Temp 0 to 60 deg C
Storage Temp -40 to +85 deg C
Power Consumption 1.32 W backplane, 4.1 W max dissipation
Voltage Category 12/24 VDC source
Operating Range 10 to 31.2 VDC
Outputs 16 points, fused (8 points/group)
Output Delay Off→On: 70 µs nom / 1 ms max; On→Off: 360 µs nom / 1 ms max
Current Draw 250 mA @ 5.1 V, 2 mA @ 24 V
Current per Point 1 A max @ 60 deg C
Current per Module 8 A max @ 60 deg C
Surge Current 2 A for 10 ms, repeatable every 2 s @ 24 VDC
Load Current Min 3 mA per point
Off-State Leakage Max 1 mA per point
On-State Voltage Drop Max 400 mV DC @ 1 A
Isolation Voltage 250 V continuous, outputs-to-backplane, group-to-group
Fusing Electronic, per group
Terminal Block 1756-TBNH / 1756-TBSH
Enclosure Type Open-style, IP30 equivalent
Temperature Code T4

Backplane Bus Communication and I/O Density Scaling

The 1756-OB16EK integrates into the ControlLogix backplane with a 250 mA draw at 5.1 VDC, supporting deterministic bus communication. Its 16 fused outputs allow I/O density scaling across racks, with synchronization referenced to Coordinated System Time (≤16.7 s). Electronic fusing per group ensures predictable fault isolation, while software-configurable keying provides secure module identification.

Frequently Asked Questions

Q: What happens to outputs during a fault condition? A: Each point can be configured to hold last state, On, or Off (default Off) during fault mode.

Q: Does the module provide isolation between individual outputs? A: No, isolation is provided between groups and backplane, not between individual outputs.

Q: What removable terminal blocks are supported? A: The module supports 1756-TBNH and 1756-TBSH terminal blocks with user-defined mechanical keying.

Field Installation Guidelines

  • Mount the module in ControlLogix chassis slots with adequate airflow.
  • Use 1756-TBNH or 1756-TBSH terminal blocks for wiring.
  • Ensure wiring category 1 compliance for discrete DC signals.
  • Maintain ambient temperature between 0 and 60 deg C during operation.
  • Route high-current conductors separately to minimize induced noise.
  • Verify electronic keying configuration before commissioning.
Related Tags:
Allen-Bradley ControlLogix Digital Output Module
Is our price competitive?
Topbrands collaborates with over 50 countries worldwide. As a leading supplier in China, we can provide significant discounts to customers based on market demand.
What is the warranty period?
We offer a standard one-year warranty for all new and original items.
What payment methods do we accept?
We accept 100% T/T (Telegraphic Transfer) before shipping. For items with a lead time, a 30% deposit is required in advance, with the remaining 70% balance due before shipping. If you have an agent in China, please contact us for RMB transfer.
What is the warranty period?
We offer a standard one-year warranty for all new and original items.
What shipping methods do we use?
We primarily utilize carriers such as FedEx, DHL, UPS, BRE, etc. If you have an account with any of these carriers, you can arrange the shipping yourself. Additionally, we offer free shipping to China freight forwarders.
What is our delivery time?
Typically, delivery takes around 1-3 days after receiving the advance payment. For items with a quoted lead time, delivery will occur as per the specified lead time.
How do we package the goods?
Our packaging process involves multiple layers of protection. Initially, the product is placed in its original box, sealed with a label. Then, we add a layer of bubble wrap to safeguard against collisions during transportation. Finally, all products are securely packed in sturdy boxes for further protection.
How can customers contact us and request a quote?
Customers can inquire via email, WhatsApp, WeChat, Skype, or any preferred communication platform. Simply reach out to us, and we'll promptly provide a quote tailored to your needs.
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Topbrands PLC Limited is a top supplier of genuine new PLC and DCS parts, serving over 50 countries globally. We offer high-quality products from renowned brands like Bently Nevada, Honeywell, ABB, and more. With our warehouse in China stocking up to 30,000 pieces, we ensure rapid delivery to meet urgent order needs while maintaining competitive pricing to save our customers' budgets. Learn more...

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