1756-CFM

Name: 1756-CFM
Brand: ROCKWELL
SKU: 1756-CFM

The Allen Bradley 1756-CFM is a ControlLogix configurable flowmeter module with 2 flowmeter inputs and 2 current sourcing DC outputs. It supports totalizer mode for metering applications and includes integral AGA 7 compensation.

Product Model1756-CFM

Product ID106719

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Configurable for PrecisionThe 1756-CFM is designed to be highly configurable, allowing users to tailor the module to their specific metering needs. This flexibility ensures accurate and reliable measurements in various applications.
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2. Totalizer Mode SupportThis module supports totalizer mode, which is essential for metering applications where cumulative measurements are required. This feature helps in tracking fluid flow over time, making it ideal for industrial processes.
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3. Integral AGA 7 CompensationThe module includes integral AGA 7 compensation, which helps in correcting for temperature variations. This ensures that the measurements remain accurate even in changing environmental conditions.
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4. High-Performance Flowmeter InputsThe module features 2 flowmeter inputs, each capable of handling high-performance flow measurement tasks. These inputs are designed to provide precise readings, making the module suitable for demanding applications.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Suitable for safety functions

Digital inputs configurable

Yes

Digital outputs configurable

Voltage type of supply voltage

Type of electric connection

Screw connection

Total backplane power

1.7 W

5. Versatile Power Supply CompatibilityThe 1756-CFM can operate within a wide power supply range of 4-5.5 VDC to 10-31.2 VDC, making it compatible with various industrial power systems. This versatility ensures that the module can be easily integrated into different control systems.

Current draw

300mA @ 5.1V, 16mA @ 24V

Module keying

Electronic, software configurable

Outputs

2 current sourcing

Power dissipation, max

6 W @ 60 Â°C (140 Â°F)

Inputs

Two flowm (F) inputs used for all modes, Two gate inputs used in Totalizer mode for prover/store count, 4 (2 per channel)

Isolation voltage

250V (continuous), reinforced insulation type, I/O-to-backplane, 250V (continuous), basic insulation type, I/O group-to-group

Wire category

2 on signal ports, 1 on power ports

Redundancy

Short-circuit protection, outputs available

High resolution, max

100 khz

Frequency

Resolution: 0.0005 Hz

Slot width

RTB keying

User-defined mechanical

Shock

Operating: 30 G, Non operating: 50 G

Vibration

2 G @ 10...500 Hz

Surrounding air temperature, max

60 Â°C

North American temperature code

Emissions

IEC 61000-6-4

ESD immunity

6 kV contact discharges, 8 kV air discharges

Relative humidity

5...95% noncondensing

Conducted RF immunity

10V rms with 1 kHz sine wave 80% AM from 150 kHz...80 MHz on shielded signal ports

EFT/B immunity

Â±4kV @ 5kHz on unshielded output and power ports, Â±4kV @ 5kHz on shielded input ports

Operating temperature

0 to 60 Â°C

Surge transient immunity

Â±1 kV line-line (DM) and Â±2 kV line-earth (CM) on unshielded output and power ports, Â±2 kV line-earth (CM) on shielded input ports

Radiated RF immunity

10 V/m with 1 kHz sine-wave 80% AM from 80...2000 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz, 3 V/m with 1 kHz sine-wave 80% AM from 2000...2700 MHz

Nonoperating temperature

-40 Â°C

On-state voltage drop, max

0.6 ? x current

Off-state leakage current, max

<300 Î¼A @ 31.2V DC

Reverse polarity protection

Outputs only

Output switching time

<50 Î¼s turn on, <300 Î¼s turn off, Outputs triggered by Total, all other âturn-onâ and âturn-offâ times <1 ms

Output control

Any number of outputs is assignable to any of two flowm channels each output can have 2 âturn-onâ and âturn-offâ preset values

Output type

IEC 1 A 24V DC

Output voltage source

Customer supplied

Overload current

Electronic (<4 A)

Surge current

2 A @ 50 ms, repeatable every 2s

Output current per point

1 @ 10...31.2V DC @ 20mA @ 4.5...5.5V DC

Output reverse polarity protection

Yes (if wired incorrectly, module outputs can be permanently disabled.)

Output short circuit protection

Electronic (no indication of fault. remove overload and toggle output on/off to restore.)

Output voltage range, nom

5V ops: 4.5...5.5V DC @ 3...20mA load per point, 12/24V ops: 10...31.2V DC @ 40mA...1 A load per point

Input frequency, max

100 kHz @ flowm inputs (overrange occurs at 100 kHz)

Gate input on-state current, min

4 mA

Gate input on-state current, nom

15 mA

Input sampling period

User selectable

Count range, max

2, 147, 483, 647

Flowmeter input impedance

5 k? Â±30% resistive

Mechanical filter debouncing (Z0 & Z1 Inputs)

Software selectable

Gate input voltage range

5V ops: 4.5...5.5V DC @ 12/24V ops: 10...26.4V DC

Filtering (inputs F0 & F1)

Firmware selectable: high-speed 100 kHz or low-pass filter for frequencies <70 Hz

Flowmeter input voltage

Â±30V, selectable input thresholds of 50mV @ 1.3V and 4V: Â±30V peak unterminated open circuit voltage, magnetic pickup, TTL compatible, input voltage >1.3V DC is Logic 1 and -0.7...1.3V DC is Logic 0, 12...24V DC powered preA output, 4V DC threshold

Totalizer fill and prover

Yes

Enclosure type

None (open-style)

Repairable

REPAIRABLE

Preferred Availability

true

Quick Turnaround

false

Dimension Height

5.715

Lead Time

Dimension Width

18.415

Dimension Length

23.495

Stock Status

STOCKED

Weight

0.354

Weight Unit