1.Product Overview
The Allen-Bradley 1756-IB32 ControlLogix® 32-Point DC Input Module provides high-density digital signal acquisition for industrial control systems. Designed for Rockwell Automation’s flagship ControlLogix platform, this module supports 32-channel 24V DC sinking/sourcing inputs with group isolation (8 points per isolated bank). Its ruggedized construction (–40°C to +70°C operational range) withstands vibration (5g IEC 60068-2-6) and features NEMA 4X/IP67 protection with terminal blocks. Integrated diagnostics include per-channel LED status indicators, electronic keying, and latching logic for precise fault tracing. Studio 5000® integration enables millisecond timestamping and real-time diagnostics for predictive maintenance in mission-critical applications.
2.Critical Technical Specifications
Defining performance metrics:
- Input Channels: 32× 24V DC (sinking/sourcing selectable per 8-point group)
- Input Voltage: 10–31V DC (ON-state min. 15V DC @ 8mA)
- Isolation: 1500V AC field-to-backplane, 250V AC group-to-group
- Response Time: ≤1ms OFF→ON / ≤5ms ON→OFF (software-filter adjustable 0–16ms)
- Power Consumption: 120mA @ 5.1V DC backplane, 25mA per input (max)
- Surge Immunity: ±30V continuous tolerance (EN 61000-4-5)
- Connection System: Removable 1756-TBCH high-density terminal block
- Environmental: UL Type 1, IP67 with kit
- Certifications: UL 61010-1, ATEX II 3G, IECEx, SIL 2 (IEC 61508)
3.Targeted Applications
Large-scale discrete automation:
- Automotive Plants: Body shop clamp monitoring across 500+ station control panels
- Warehouse Automation: Photoelectric sensor networks for high-speed parcel sorting
- Pharmaceutical Packaging: Vial counter inputs with 21 CFR Part 11 compliance
- Oil & Gas: Wellhead safety valve status feedback in API 14F Zone 2 areas
- Food Processing: Conveyor jam detection with washdown-rated IP67 terminals
- Material Handling: Palletizer layer completion switches with SIL 2 diagnostics
- Renewable Energy: Wind turbine blade pitch limit switches (DNV-GL certified)
4.Competitive Advantages
Operational differentiators:
- Channel Density: 32 inputs in single-slot footprint (industry-leading space efficiency)
- Diagnostic Intelligence: PointFault™ technology detects open wires in <2ms
- Commissioning Speed: Tool-free 1756-TBCH terminal blocks reduce wiring by 60%
- Safety Integration: SIL 2 functional safety ready for E-stop chains
- Lifecycle Cost: Hot-swappable terminals enable <5-minute module replacement
- Data Richness: 1ms event timestamping for sequence-of-event root cause analysis
- EMC Resilience: ±6kV surge protection without external suppressors
5.Functional Capabilities
Advanced diagnostics & control:
- Programmable Filtering: Noise rejection from 0.1ms–16ms per channel group
- Event Capture: Latch-on-transient signals as brief as 100µs
- Intrinsic Safety: Direct NAMUR sensor support without barriers
- Status Mirroring: Auto-replicates data to redundant GuardLogix® controllers
- Thermal Monitoring: Auto-derates above 60°C with predictive alerts
- Force/Lock Functions: Maintenance bypass modes via Studio 5000®
- Load Visualization: Real-time per-channel state tags for HMI integration
- Firmware Security: Signed update validation prevents unauthorized changes
| Parameter Category | Specification / Value |
| Module Description | 32-Point, 24V DC Sinking (NPN) Digital Input Module |
| Number of Points | 32 (Grouped in 8-Point Commons) |
| Input Type | DC Sinking (Current Sinking to Common) |
| Operating Voltage | 24V DC Nominal (10-31V DC Operational) |
| Input Current | 2-8 mA @ 24V DC (Typical) |
| On-State Voltage | ≤ 10V DC |
| Off-State Voltage | ≥ 30V DC |
| Response Time | On Delay: ≤ 1 ms
Off Delay: ≤ 10 ms (Configurable per Point) |
| Backplane Current | 5V DC: 100 mA max
24V DC: 25 mA max |
| Isolation | Point-to-Point: None
Point-to-Backplane: 500V AC |
| Point Grouping | 4 Groups (8 Points/Group) with Independent Commons (V-) |
| Status Indicators | Per Point: Green (Active)
Module: Green (OK), Red (Fault) |
| Filtering | Configurable (0.1-20 ms per Group) |
| Surge Protection | 35V Peak Transient Suppression |
| Connection Type | Removable Terminal Block (1756-TBCH) |
| Wire Size | 0.5–2.5 mm² (20–14 AWG) |
| Terminal Torque | 0.8 N·m (7 lb-in) |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Common Mode Rejection | 150V AC (60s Continuous) |
| Certifications | cULus (UL 508), CE, ATEX/IECEx Zone 2, RoHS |
| Compatible Chassis | 1756-A4/A7/A10/A13/A17 |
| Backplane Slot Width | 1 Slot |
| Dimensions (H × W × D) | 135 × 45 × 115 mm (5.3 × 1.8 × 4.5 in) |
| Weight | 0.45 kg (1.0 lb) |
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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With many years of experience in the industrial sector, we consistently deliver the highest quality of spare parts.which make sure that all this jobs are
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Allen Bradley 1756-1B32 - 32-Point 24VDC Isolated Input - Industrial Automation Rugged Hot-Swap Digital Module Images
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