Excellent PLC
Product Introduction
The Allen Bradley 1797-IE8 Flex Ex I/O Analog Input Module is an intrinsically safe analog input module designed for use within the FLEX Ex distributed I/O platform. It is specifically engineered to acquire and process current-based signals from field devices operating in hazardous environments, ensuring accurate and stable data transmission to the control system.
This module supports eight single-ended analog input channels and is optimized for 0–20 mA signal ranges, making it suitable for interfacing with a wide range of industrial transmitters such as pressure, temperature, and flow sensors. With 16-bit resolution, it delivers precise signal conversion, enabling high-quality process monitoring and control.
A built-in three-position key switch simplifies configuration and commissioning, allowing users to set operational modes directly on the module without requiring complex software adjustments. Its robust design ensures dependable operation in harsh industrial environments, particularly in applications where intrinsic safety is mandatory.
Product Specifications
| Parameter | Description |
|---|---|
| Model | 1797-IE8 |
| Brand | Allen-Bradley |
| Series | FLEX Ex |
| Module Type | Analog Input Module |
| Number of Inputs | 8 Single-ended Inputs |
| Input Signal Range | 0–20 mA |
| Resolution | 16 Bits |
| Configuration Method | 3 Position Key Switch |
| Field-side Power Consumption | 7.5 W |
| Power Dissipation | 5.2 W |
| Channel Type | Current Input |
| Isolation Type | Intrinsically Safe Design |
| Mounting Type | DIN Rail |
| Dimensions | 94 × 46 × 75 mm |
| Weight | 0.2 kg |
Applications
• Used for process signal acquisition in industries such as oil & gas, petrochemical, and chemical processing where analog measurements are critical
• Interfaces with field transmitters including pressure, temperature, flow, and level sensors operating on 0–20 mA signals
• Ideal for hazardous area installations requiring intrinsically safe I/O modules compliant with safety standards
• Supports distributed control systems where remote I/O data collection is necessary for centralized monitoring
• Applicable in continuous process environments where high-resolution signal accuracy is required for stable operation
Advantages
• High measurement accuracy with 16-bit resolution ensures precise analog signal acquisition
• Intrinsic safety design allows safe operation in explosive or hazardous environments without additional barriers
• Flexible configuration via integrated three-position key switch simplifies setup and reduces commissioning time
• Efficient power usage with optimized field-side consumption and low heat dissipation
• Compact module structure enables high-density installation within control cabinets
• Reliable performance under harsh industrial conditions with stable signal processing capability
