Description
1771-IND Allen‑Bradley Programmable controller
Product Dimensions：
Product Description
The Allen-Bradley Isolated AC/DC Input Module is a versatile industrial input module designed for use in Allen-Bradley PLC systems such as PLC-5 and SLC 500. This module provides optically isolated input channels capable of accepting both AC and DC voltage signals, making it suitable for diverse industrial environments. The isolation feature protects the PLC from electrical noise, voltage spikes, and ground potential differences, enhancing system reliability and safety.
Product Specifications
| Parameter | Value/Description |
|---|---|
| Module Type | Isolated AC/DC Input Module |
| Input Voltage Range | 10–250V AC or 10–125V DC |
| Input Type | Optically isolated |
| Number of Inputs | Typically 8 or 16 inputs (varies by model) |
| Input Current | ~10mA per input at rated voltage |
| Isolation Voltage | 1500V RMS between input channels and backplane |
| Response Time | ≤ 20ms ON, ≤ 20ms OFF |
| LED Indicators | One per input point (status indicator) |
| Backplane Current | ~250mA max from 5V backplane |
| Operating Temperature | 0–60°C (32–140°F) |
| Compatibility | Allen-Bradley PLC-5, SLC 500, and compatible I/O chassis |
Product Advantages
- Dual AC/DC Compatibility: Supports both AC and DC input signals, providing flexibility in system design.
- Channel-to-Channel Isolation: Each input is individually isolated, preventing cross-channel interference and improving noise immunity.
- High Voltage Isolation: Protects the PLC backplane and CPU from high-voltage transients and ground loops.
- Status Indication: LED indicators for each input point provide quick visual diagnostics.
- Wide Voltage Range: Accommodates a broad range of industrial input voltages without additional signal conditioning.
- Robust Industrial Design: Engineered for long-term reliability in harsh environments.
Precautions
- Wiring Polarity: For DC inputs, ensure correct polarity to avoid malfunction or damage.
- Grounding: Proper grounding is essential to maximize the effectiveness of the isolation.
- Input Load: Ensure connected devices (e.g., sensors, switches) do not exceed the module’s input current rating.
- Environmental Limits: Do not exceed the specified temperature and humidity ranges during operation.
- Backplane Power: Verify that the I/O chassis power supply can support the module’s backplane current requirements.
- Fusing: External fusing may be required for input circuits depending on application and local electrical codes.
Product Applications
- Industrial Control Systems: Used in manufacturing lines for interfacing with a variety of field devices such as limit switches, pushbuttons, and selector switches.
- Process Control: Ideal for acquiring isolated status signals in chemical, pharmaceutical, and food processing industries.
- Infrastructure Projects: Used in power plants, water treatment facilities, and transportation systems for high-noise immunity signal acquisition.
- Building Automation: Integration with HVAC systems, elevators, and security systems where mixed AC/DC signals are present.
- Remote Monitoring: Suitable for SCADA and telemetry systems requiring isolation over long cable runs or between different ground potentials.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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