Product Name:electronically fused output module
Brand Name: Allen Bradley
Model Number:1756-OB16E
Country of Origin:USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
Allen Bradley |
Model Number: |
1756-OB16E |
Country of Origin: |
USA |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
Delivery time in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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Contact in Whatsapp: |
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Parameter |
Specification |
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Catalog Number |
1756-OB16E |
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Manufacturer |
Rockwell Automation / Allen-Bradley |
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Outputs |
16 (electronically fused, 8 points per group) |
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Voltage Category |
12/24V DC sourcing |
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Operating Voltage Range |
10…31.2V DC |
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Output Delay Time (Off→On) |
70 µs nominal / 1 ms maximum |
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Output Delay Time (On→Off) |
360 µs nominal / 1 ms maximum |
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Current Draw @ 5.1V |
250 mA |
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Current Draw @ 24V |
2 mA |
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Total Backplane Power |
1.32 W |
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Power Dissipation (max.) |
4.1 W @ 60°C |
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Thermal Dissipation |
13.98 BTU/hr |
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Off-state Leakage (max.) |
1 mA per point |
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On-state Voltage Drop (max.) |
400 mV DC @ 1 A |
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Current per Point (max.) |
1 A @ 60°C |
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Current per Module (max.) |
8 A @ 60°C |
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Surge Current (typical) |
2 A for 10 ms per point, repeatable every 2 s @ 0°C |
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Minimum Load Current |
3 mA per point |
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States in Fault/Program Mode |
Hold last state, On or Off (default: Off) |
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Scheduled Outputs |
Synchronization ≤16.7 s reference to Coordinated System Time |
The 1756-OB16E is a 16‑point electronically fused DC output module from Allen‑Bradley’s ControlLogix family, engineered for reliable sourcing of 12/24V DC loads in demanding industrial automation. The 1756-OB16E provides electronic short‑circuit and overload protection that responds within milliseconds, eliminating the need for discrete fuses while reducing downtime. With each of its 16 outputs capable of 1 A continuous current (8 A module total), the 1756-OB16E supports high‑density control of solenoids, indicators, and motor starters. The 1756-OB16E offers programmable fault‑state behavior, comprehensive diagnostic feedback, and rigorous agency certifications for global deployment.
Reduced Maintenance & Downtime – Electronic fusing eliminates physical fuse replacement; modules automatically reset after fault clearance, minimizing production interruptions.
Enhanced Diagnostics – Individual E‑Fuse LEDs pinpoint affected channels, accelerating troubleshooting and reducing mean time to repair.
Flexible Fault Response – Programmable per‑point states (On, Off, or Hold Last) in fault and program modes enable tailored safety and process continuity strategies.
High‑Density Footprint – 16 outputs in a single slot reduce chassis space requirements, freeing slots for additional I/O or communication modules.
No Scheduled Output Degradation – Solid‑state switching delivers consistent performance without contact wear, ensuring long‑term reliability in high‑cycle applications.
Global Compliance – UL, CSA, CE, ATEX, FM, and KC certifications simplify system design for international projects.
Electronic Overcurrent Protection – Each output channel is independently protected against short‑circuit and overload conditions via thermal cut‑out circuitry.
Fast Switching Performance – Sub‑millisecond turn‑on/turn‑off delays support high‑speed control applications.
Wide Operating Voltage Range – Accepts 10…31.2V DC, accommodating variations in field power supplies and cable drops.
Diagnostic E‑Fuse LEDs – Individual channel indicators illuminate upon fault detection, enabling rapid visual fault isolation.
Programmable Fault/Program State – Each point can be configured to hold last state, turn On, or turn Off in response to controller fault or program mode transitions.
Grouped Common Architecture – 8 points per common group simplify wiring and reduce terminal block complexity.
Scheduled Output Support – Outputs can be synchronized to Coordinated System Time for coordinated motion or process applications.
High Surge Capability – Handles 2 A inrush for 10 ms per point, suitable for incandescent lamp loads and capacitive transients.
Removable Terminal Block – 1756‑TBxxx or 1756‑TBNH series wiring arms simplify installation and maintenance.
Class I Division 2 Approval – Certified for hazardous locations when installed per applicable safety codes.
The 1756-OB16E is designed to operate reliably across a broad range of industrial environments. It complies with stringent EMC standards, including 6 kV contact / 8 kV air electrostatic discharge immunity, 10 V/m radiated RF immunity from 80 MHz to 2.7 GHz, and ±4 kV EFT/B immunity on signal ports. The module withstands surge transients of ±1 kV line‑line and ±2 kV line‑earth, as well as oscillatory surge up to 3 kV per IEEE C37.90.1. Its operating temperature range supports 0°C to 60°C (32°F to 140°F) at full rated current. The 1756-OB16E carries comprehensive global certifications including UL Listed Industrial Control Equipment (File E65584), CSA Certified Process Control Equipment (File LR4689C) with Class I Division 2 Groups A‑D approval, CE Marking for EMC and Low Voltage Directives (EN 61326‑1, EN 61131‑2), ATEX Ex nA IIC T4 X Gc certification, FM approval for Class I Division 2, and KC registration. These certifications ensure compliance for installation in North America, Europe, Australia, and South Korea.
Q1: What is the difference between the 1756-OB16E and a standard fused output module?
A1: The 1756-OB16E incorporates electronic overcurrent protection that responds within milliseconds to short‑circuit and overload conditions, then automatically resets when the fault is cleared. Standard fused modules require physical fuse replacement after each fault, increasing downtime and maintenance costs.
Q2: How does electronic protection work on the 1756-OB16E?
A2: Each channel has thermal cut‑out circuitry that limits current when its temperature threshold is exceeded. When an overload or short circuit occurs, the channel turns off. Once the channel cools below the threshold, it automatically resets and resumes normal operation—provided the fault condition has been corrected.
Q3: What is the maximum continuous current per output and per module?
A3: Each output supports up to 1 A continuous at 60°C, with a module‑total capacity of 8 A. The module also handles 2 A surge current for 10 ms per point (repeatable every 2 seconds) to accommodate inrush loads.
Q4: Can the 1756-OB16E be used to replace a 1756-OB16I or 1756-OB16D in an existing system?
A4: While all three are 16‑point DC output modules with similar form factors, the 1756‑OB16E offers electronic fusing and enhanced diagnostics not available on the non‑protected versions. Check your system’s wiring diagrams and configuration to ensure compatibility, as the fault‑state behavior may differ.
Q5: What happens when an output channel faults on the 1756-OB16E?
A5: The affected channel turns off, the corresponding E‑Fuse LED illuminates, and the module continues operating normally on unaffected channels. After removing the fault (short circuit or overload), the module automatically resets the channel; no manual reset or power cycle is required.、
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