Product Description
Allen-Bradley 1756-IF8 Analog Input Module
Product Overview
The Allen-Bradley 1756-IF8 is an 8-channel analog input module designed for use in ControlLogix systems. It supports voltage and current input signals, offering high resolution and precision for industrial automation applications.
Technical Specifications
Electrical Ratings
| Attribute | 1756-IF8 Specifications |
|---|---|
| Input Channels | 8 Single-Ended, 4 Differential, 2 High-Speed Differential |
| Input Voltage Range | ±10V, 0–10V, 0–5V |
| Input Current Range | 0–20mA |
| Resolution | ±10.25V: 320 µV/count (15-bit + sign) 0–10.25V: 160 µV/count (16-bit) 0–5.125V: 80 µV/count (16-bit) 0–20.5mA: 0.32 µA/count (16-bit) |
| Current Draw @ 5.1V DC | 200 mA |
| Current Draw @ 24V DC | 30 mA |
| Backplane Power Consumption | 1.74 W |
| Power Dissipation | Voltage: 1.74 W Current: 2.58 W |
| Thermal Dissipation | Voltage: 5.94 BTU/hr Current: 8.79 BTU/hr |
Performance & Accuracy
| Attribute | Specification |
|---|---|
| Normal Mode Noise Rejection | >80 dB @ 50/60 Hz |
| Common Mode Noise Rejection | >100 dB @ 50/60 Hz |
| Calibrated Accuracy (25°C) | Voltage: Better than 0.05% of range Current: Better than 0.15% of range |
| Offset Drift | 45 µV/°C |
| Gain Drift with Temperature | Voltage: 15 ppm/°C Current: 20 ppm/°C |
| Module Error | Voltage: 0.1% of range Current: 0.3% of range |
| Onboard Features | Real-time channel sampling, engineering unit scaling, data alarming |
Environmental Ratings
| Attribute | Specification |
|---|---|
| Operating Temperature | 0…60°C (32…140°F) |
| Non-Operating Temperature | -40…85°C (-40…185°F) |
| Relative Humidity | 5…95% (non-condensing) |
| Shock Resistance (Operating/Non-Operating) | 30 g |
| Vibration Resistance | 2 g @ 10–500 Hz |
| ESD Immunity | 6 kV (contact) / 8 kV (air) |
| Surge Protection | ±2 kV (line-to-earth) |
Mechanical & Installation
| Attribute | Specification |
|---|---|
| Slot Width | 1 |
| Isolation Voltage | 250V (continuous), Basic Insulation (Inputs to Backplane) |
| Terminal Block Options | 1756-TBCH / 1756-TBS6H |
| Wire Size (Single Wire) | 0.33–2.1 mm² (22–14 AWG) solid or stranded |
| Wire Size (Double Wire) | 0.33–1.3 mm² (22–16 AWG) solid or stranded |
| Torque (Terminal Block) | 0.5 N•m (4.4 lb•in) |