1756-IF4FXOF2F Allen Bradley Rockwell Analog Combination Module

Product Parameters

Basic Information:

Manufacturer: Allen-Bradley (Rockwell Automation)

Model: 1756-IF4FXOF2F (Series A)

Type: High-Speed Analog Combination Input/Output Module

Compatible Systems: ControlLogix series (compatible with PLC-5 via adapters)

Installation: Occupies one slot in a 1756 ControlLogix chassis, suitable for local or distributed I/O configurations

Module Location: Can be installed in any slot of the ControlLogix chassis

Electrical Parameters:

Input Channels:

Number: 4 high-speed, sub-millisecond, differential inputs

Input Signal Ranges:

Voltage: ±10V, 0–10V, 0–5V

Current: 0–20 mA (commonly 4–20 mA)

Resolution:

Voltage: 14 bits across ±10.5V (1.3 mV/bit), 0–10.5V (1.3 mV/bit), 0–5.25V (650 µV/bit)

Current: 14 bits across 21 mA (2.8 µA/bit)

Overvoltage Protection: 30V DC (voltage), 8V AC/DC (current)

Open Circuit Detection: Positive full-scale reading within 1 second (current mode)

Input Impedance:

Voltage: >10 MΩ

Current: 249 Ω

Output Channels:

Number: 2 high-speed voltage or current outputs

Output Signal Ranges:

Voltage: ±10V

Current: 0–20 mA (commonly 4–20 mA)

Resolution:

Voltage: 14 bits across 21.8V (1.3 mV/bit)

Current: 13 bits across 21 mA (2.8 µA/bit)

Short-Circuit Protection: Electronically limited to 21 mA or less

Overvoltage Protection: 24V DC

Open Circuit Detection: Limited to current output, requires >0.1 mA

Drive Capability:

Voltage: >2000 Ω

Current: 0–700 Ω

Backplane Current:

375 mA @ 5.1V DC

100 mA @ 24V DC

Backplane Power: 4.3 W (total)

Power Dissipation:

Voltage: 4.3 W

Current: 4.7 W

Thermal Dissipation:

Voltage: 14.66 BTU/hour

Current: 16.02 BTU/hour

Update Period: Minimum 300 µs (sub-millisecond channel scans)

Isolation Voltage: 50V continuous (channel-to-backplane), tested at 1500V AC for 60 seconds (basic insulation)

Connection and Wiring:

Removable Terminal Blocks (RTBs):

1756-TBCH: 36-position Cage-Clamp block

1756-TBS6H: 36-pin spring clamp block

Wire Size:

0.33–2.1 mm² (22–14 AWG) solid or stranded shielded copper wire, rated at 105°C (221°F) or greater, 1.2 mm insulation max

Torque: 0.5–0.6 Nm (4.4–5.3 lb-in) for 1756-TBCH

Wiring Options: Supports Removable Terminal Blocks (RTBs) or 1492 Interface Modules (IFMs) with pre-wired cables

Environmental Specifications:

Operating Temperature: 0°C to 60°C (32°F to 140°F)

Storage Temperature: -40°C to 85°C (-40°F to 185°F)

Relative Humidity: 5% to 95% (non-condensing)

Vibration: 2G @ 10–500 Hz

Shock: 15G (operating), 30G (non-operating)

Enclosure Type: Open-type

Emissions: CISPR 11, Group 1, Class A

ESD Immunity: IEC 61000-4-2 (6 kV contact, 15 kV air)

Radiated RF Immunity: IEC 61000-4-3 (10 V/m, 30 MHz to 2000 MHz)

Temperature Codes: T4 (North America, IEC, ATEX)

Other:

Conversion Method: R-Ladder DAC for outputs, Delta-Sigma ADC for inputs, monotonicity with no missing codes

Data Formats: IEEE 32-bit floating point, Integer (left-justified, 2’s complement)

Indicators: Bi-colored LED for module status (red/green), CAL status indicator

Certifications: UL, CSA, CE, C-TICK, ATEX, FM, KC, IECEx, ABS

Functions

High-Speed Analog I/O:

Provides 4 high-speed, sub-millisecond differential inputs for precise measurement of voltage (±10V, 0–10V, 0–5V) or current (0–20 mA) signals.

Offers 2 high-speed voltage (±10V) or current (0–20 mA) outputs for rapid control of analog devices like valves or VFDs.

Synchronized Sampling:

Supports sub-millisecond channel scans and synchronized sampling across multiple modules, ideal for time-critical applications requiring coordinated data acquisition.

Protection Features:

Overvoltage Protection: 30V DC (inputs, voltage mode), 8V AC/DC (inputs, current mode), 24V DC (outputs).

Short-Circuit Protection: Electronically limits output current to 21 mA or less.

Open-Circuit Detection: Detects open circuits in current mode for inputs (within 1 second) and outputs (>0.1 mA).

Diagnostics and Alarming:

Features real-time channel sampling and onboard data alarming for immediate fault detection (e.g., over/under range, open circuit).

Includes a display for module health and operation state (e.g., calibration mode).

Flexible Data Handling:

Supports IEEE 32-bit floating point and Integer data formats for compatibility with various control algorithms.

Uses R-Ladder DAC for outputs and Delta-Sigma ADC for inputs, ensuring accurate and monotonic signal conversion.

System Integration:

Integrates with ControlLogix controllers via ControlNet, EtherNet/IP, or DeviceNet networks.

Supports local or distributed I/O configurations, compatible with Studio 5000 Logix Designer for configuration and diagnostics.

Modular Design:

Supports Removal and Insertion Under Power (RIUP) with removable terminal blocks (1756-TBCH, 1756-TBS6H), simplifying maintenance and reducing downtime.

Compatible with 1492 Interface Modules (IFMs) for pre-wired cabling options.

Application Scenarios

High-Speed Process Control:

Used in applications requiring rapid response, such as controlling high-speed valves, actuators, or VFDs in chemical processing, oil and gas, or water treatment.

Ideal for precise modulation of flow, pressure, or temperature in time-critical processes.

Manufacturing Automation:

Drives VFDs or servo motors in production lines for automotive manufacturing, packaging, or material handling, where sub-millisecond response ensures accurate control.

Supports high-speed data acquisition for real-time monitoring of sensors in robotic systems.

Motion Control:Interfaces with motion control devices requiring fast analog inputs/outputs, such as position or velocity feedback systems in CNC machines or conveyor systems.

Distributed Control Systems:Deployed in distributed I/O setups via ControlNet or EtherNet/IP, enabling centralized control of remote analog devices in large-scale facilities like power plants or refineries.

Signal Re-Transmission:Re-transmits analog signals (e.g., 4–20 mA) to interface with external indicators, recorders, or SCADA systems, supporting process monitoring and data logging.

Legacy System Upgrades:Integrates with PLC-5 systems (via adapters) or serves as a key component in modernizing to ControlLogix platforms, replacing older 1771 series modules (e.g., 1771-NBSC) for enhanced speed and resolution.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

Many Available just wait for you, feel free to ask to get better deal!!!

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