Get the genuine Allen-Bradley 1756-OB16E ControlLogix Discrete Output Module featuring 16 electronically fused points and 24 VDC sourcing outputs. Discontinued Spare, Original Surplus with Global Shipping. Minimize automation downtime now.
The Allen-Bradley 1756-OB16E, also cataloged as the 1756-OB16E Discrete output module, operates as a dedicated hardware component for physical output signal execution within ControlLogix chassis-based platforms.
| Parameter | Specification |
|---|---|
| Model | 1756-OB16E |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.24 kg |
| Dimensions | 3.5 x 13.0 x 14.5 cm |
| Operating Temp | 0 to 60 deg C |
| Power Dissipation | 4.1 W maximum at 60 deg C |
| Outputs | 16 electronically fused (sourcing configuration) |
| Channel Groups | 2 groups of 8 channels |
| Operating Voltage Range | 10 to 31.2 VDC |
| Nominal Output Voltage | 24 VDC |
| Backplane Current | 250 mA at 5.1 VDC; 2 mA at 24 VDC |
| Output Current Per Point | 1.0 A maximum at 60 deg C |
| Output Current Per Module | 8.0 A maximum at 60 deg C |
| Surge Current Per Point | 2.0 A for 10 ms, repeatable every 2 s |
| Minimum Load Current | 3 mA per channel |
| Turn-On / Turn-Off Delay | 70 us nominal (1 ms maximum) |
| Continuous Isolation Voltage | 250 V |
The 1756-OB16E provides integrated I/O density scaling by embedding 16 independent solid-state output switches within a single slot chassis profile. This hardware communicates over a high-speed backplane bus, enabling fast real-time synchronization between the master processing unit and field components. Through the use of producer/consumer communication infrastructure, the module updates channel state confirmations and electronic fuse diagnostic bits deterministically, eliminating processing bottlenecks during simultaneous multi-channel actuation.
Q: How does the electronic fusing functionality operate inside the 1756-OB16E hardware?
A: The module contains electronic protection circuits grouped across its two 8-channel structures. If a channel experiences a current overload or dead short that exceeds the threshold limits, the module trips the internal electronic fuse for that specific group, illuminates the corresponding fault LED, and transmits a diagnostic fault state packet across the backplane bus.
Q: What is the reset procedure after an electronic fuse trips on a channel group?
A: Once the external short-circuit condition or overload is cleared, the electronic fuse must be reset via the control software (such as Studio 5000 Logix Designer) by toggling the fuse reset bit or cycling the field-side 24 VDC power loop connected to that group.
Q: Can the 1756-OB16E module be inserted or removed from the chassis while power is applied?
A: Yes, the module supports Removal and Insertion Under Power (RIUP). It can be hot-swapped within the chassis while the backplane is energized, provided the field wiring terminal block is disconnected or the field loop power is completely locked out to mitigate inductive electrical arcing.
The Allen-Bradley ControlLogix 1756-L55M16 is an advanced industrial controller from the Logix5000 family, equipped with 7.5 MB of user logic memory, 208 KB of dedicated I/O memory, and a dual-CPU processor architecture that optimizes logic execution separate from chassis backplane traffic. Built for heavy-duty automation systems, it manages up to 128,000 total digital I/O points with a blistering 0.08 ms program scan time. Supporting multi-network connectivity across EtherNet/IP, ControlNet, and DeviceNet alongside producer/consumer data tag broadcasting, this processor provides the ultimate scalability, multi-language scheduling, and reliable multitasking control for complex, modern factory floor operations.
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