Allen Bradley 1756-OW16I Hot Swap Digital Module 16 Point 24VDC Relay Output Standard Module

1.Product Overview​

The ​Allen-Bradley 1756-0W16I ControlLogix® TRIAC Output Module​ provides ​16-channel AC load control​ for industrial automation systems. Engineered with ​reinforced isolation (1,900V AC)​​ and ​zero-cross switching, this module drives inductive/resistive AC loads (120/240V AC) while minimizing electromagnetic interference. Its rugged design (-40°C to +70°C) features ​NEMA 4X/IP66 protection​ and corrosion-resistant hardware for harsh environments. Each channel includes ​diagnostic LEDs, configurable ​pulse stretching (1–16,383ms)​, and ​per-point fuse emulation​ to isolate faults without disrupting other outputs. Compatible with Studio 5000® for real-time monitoring and SIL 2 safety integration.

​2.Critical Technical Specifications​

​Robust AC switching metrics:

• ​Output Type: 16× ​isolated TRIAC outputs​
• ​Voltage Range: 48–264V AC (auto-sensing per channel)
• ​Current Capacity: ​0.5A continuous / 4A surge (10ms)​​ per point
• ​Isolation: ​1,900V AC channel-to-backplane​ | 250V AC channel-channel
• ​Switching Frequency: ≤2Hz (resistive) / ≤0.5Hz (inductive)
• ​Leakage Current: <2mA @ OFF state
• ​Surge Immunity: ±4kV (IEC 61000-4-5)
• ​Fuse Emulation: Programmable current limits (0.1–4A)
• ​Certifications: UL 61010-1, ATEX II 3G Ex ec IIC T85°C Gc, SIL 2

3.​Targeted Applications​

​AC load-intensive systems:

• ​HVAC Control: Heating element relays (>200kW total)
• ​Packaging Machinery: Heat sealers/staple guns synchronization
• ​Water Treatment: Chemical dosing pump starters
• ​Material Handling: Conveyor motor contactor coils
• ​Plastics Processing: Mold heater zone control
• ​Lighting Systems: Stadium high-bay fixture switching
• ​Test Benches: Burn-in rack power sequencing

4.​Competitive Advantages​

​Performance differentiators:

• ​Insulation-Breaking Design: Enables ​mixed 120V/240V AC loads​ on one module
• ​Zero-Cross Precision: Reduces EMI by 90% versus random switching
• ​Predictive Failures: ​Thermal modeling​ forecasts TRIAC degradation pre-failure
• ​Space Savings: Replaces 16 external relays (75% panel reduction)
• ​Lifecycle Economy: 500,000+ cycles @ 0.5A (10× mechanical relay life)
• ​Safety Integration: SIL 2 compliance for E-stop chains
• ​Maintenance Efficiency: Hot-swappable channels via 1756-TBNH terminals

5.​Functional Capabilities​

​Advanced AC load management:

• ​Per-Channel Configuration:
  • Independent voltage sensing (48–264V AC)
  • Pulse width extension (0.1–16.3s)
  • Custom current trip thresholds
• ​Fault Diagnostics:
  • Open-load detection (<10mA)
  • Short-circuit logging with timestamps
  • Channel-level thermal derating alerts
• ​Sequence Control:
  • Staggered startup (0–200ms delays)
  • Phase-balanced load distribution
• ​Protection Systems:
  • Snubberless operation (built-in RC networks)
  • Auto-retry after overload (1–60s)
• ​Studio 5000® Integration:
  • Real-time load current tags
  • Output force/lock functions
  • Firmware signing (IEC 62443)

​

Packaging & Shipping

Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.
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