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Allen-Bradley 1769-IA16 is a compact digital input module in Rockwell Automation's CompactLogix system, designed for switching signal acquisition in industrial fields. This module provides 16 independent DC digital input channels, which can connect proximity switches, photoelectric sensors, limit switches and other field devices, converting external switch signals into digital signals recognizable by the control system. It is suitable for signal monitoring and logic control of small and medium-sized automation equipment, such as packaging machinery, material conveying lines, and small production lines, providing real-time and reliable on-site status feedback for the system.
- Channel Configuration: 16 DC digital input channels, with 8 channels per group isolated; isolation voltage ≥250V AC, effectively blocking interference between different channels.
- Input Specifications: Supports 24V DC input signals, compatible with PNP or NPN sensors (switched via internal configuration), input current 4mA@24V DC.
- Response Time: Configurable via software, fast mode ≤1ms, slow mode ≤10ms, adapting to signal acquisition needs of different equipment (e.g., high-speed counting or anti-jitter scenarios).
- Input Mode: Supports sinking or sourcing input, selected via hardware jumpers on the module, flexibly adapting to different types of sensor outputs.
- Operating Environment: Operating temperature 0℃~60℃, storage temperature -40℃~85℃, relative humidity 5%~95% (non-condensing), protection class IP20 (suitable for control cabinet installation).
- Power and Communication: Powered via CompactLogix backplane bus, no external power required, power consumption ≤5W; communication rate with controller ≤1ms, ensuring data real-time 性.
- Status Indication: Each channel is equipped with an LED status indicator (green for input signal, off for no signal); the module has overall power and fault indicators.
- Dimensions: Width×height×depth approximately 32mm×110mm×86mm, DIN rail mounted, compatible with Compact I/O racks (e.g., 1769-L3x controller racks).
- Certification Standards: UL 508, CSA C22.2 No.14, CE certified, compliant with IEC 61131-2 industrial control equipment standards.
- Compact and Efficient Design: 32mm ultra-thin width enables high-density I/O integration in limited control cabinet space, saving 50% installation space compared to traditional modules, suitable for small automation equipment.
- Flexible Signal Adaptation: Supports PNP/NPN sensors, sinking/sourcing input switching, adapting to field devices of different brands without module replacement, reducing spare parts inventory costs.
- Configurable Response Speed: Fast mode meets high-speed signal acquisition (e.g., bottle cap detection sensors), slow mode filters high-frequency interference (e.g., limit switches in vibrating environments), reducing false triggers.
- Group Electrical Isolation: 8 channels per isolated group avoid external voltage fluctuations (e.g., sensor power failure) affecting other channels, improving system anti-interference capability.
- Convenient Installation and Maintenance: DIN rail mounting and modular design enable quick module replacement; LED indicators intuitively display channel status, shortening troubleshooting time.
- Small Packaging Machinery: Collects signals from liquid level switches and film roll tension sensors of filling equipment; 16 channels cover all limit and status monitoring points of the equipment, supporting precise start-stop control.
- Material Conveying Systems: Connects photoelectric sensors (detecting material presence) and travel switches (positioning endpoints) of conveyors; fast response mode ensures accurate material sorting.
- Medical Equipment: In disinfection and sterilization equipment, monitors door closing signals and heating tube status; slow mode filters contact jitter to ensure signal stability.
- Laboratory Automation: Adapts to button and knob signal input of small test benches, compatible with different types of control elements, supporting automatic triggering of test procedures.
- Agricultural Machinery: Used for sunshade curtain limit and irrigation valve status monitoring in greenhouses; wide temperature design adapts to outdoor temperature fluctuations, ensuring stable equipment operation.
- Sensor wiring must use shielded twisted-pair cables with the shield grounded at one end (control cabinet side); avoid parallel routing with power cables to reduce signal misjudgment caused by electromagnetic interference.
- After switching sinking/sourcing input via hardware jumpers, the module must be powered on again for configuration to take effect; incorrect jumper positions may cause input signal failure or module damage.
- Module installation must ensure firm connection with the CompactLogix rack and proper insertion of backplane connectors to prevent poor contact due to vibration.
- During system commissioning, configure response time via RSLogix 5000 software, selecting the appropriate mode according to sensor type (e.g., fast mode for high-speed counting).
- Regularly check input channel voltage (≥18V for valid signals) and clean dust on the module surface; maintenance is required quarterly in dusty environments.
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