| Suitable for safety functions |
False
|
|---|---|
| Digital inputs configurable |
True
|
| Digital outputs configurable |
False
|
| Voltage type of supply voltage |
DC
|
| Type of electric connection |
Screw connection
|
| Total backplane power |
1.7 W
|
| Thermal dissipation |
20.4 btu/h
|
| Current draw |
300mA @ 5.1V, 16mA @ 24V
|
| Module keying |
Electronic, software configurable
|
| Outputs |
2 current sourcing
|
| Power dissipation, max |
6 W @ 60 °C (140 °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 |
False
|
| Short-circuit protection, outputs available |
False
|
| High resolution, max |
100 khz
|
| Frequency |
Resolution: 0.0005 Hz
|
| Slot width |
1
|
|---|---|
| RTB keying |
User-defined mechanical
|
| Shock |
Operating: 30 G, Non operating: 50 G
|
| Vibration |
2 G @ 10...500 Hz
|
| Surrounding air temperature, max |
60 °C
|
|---|---|
| North American temperature code |
T4
|
| 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 |
±4kV @ 5kHz on unshielded output and power ports, ±4kV @ 5kHz on shielded input ports
|
| Operating temperature |
0 to 60 °C
|
| Surge transient immunity |
±1 kV line-line (DM) and ±2 kV line-earth (CM) on unshielded output and power ports, ±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 °C
|
| On-state voltage drop, max |
0.6 Ω x current
|
|---|---|
| Off-state leakage current, max |
<300 µA @ 31.2V DC
|
| Reverse polarity protection |
Outputs only
|
| Output switching time |
<50 µs turn on, <300 µs turn off, Outputs triggered by Total, all other “turn-on” and “turn-off” times <1 ms
|
| Output control |
Any number of outputs is assignable to any of two flowm channels each output can have 2 “turn-on” and “turn-off” 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 kΩ ±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 |
±30V, selectable input thresholds of 50mV @ 1.3V and 4V: ±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 |
True
|
|---|---|
| Enclosure type |
None (open-style)
|
| Drawings | |
|---|---|
| Product Drawing | Drawing (DWG) |
| Product Drawing | Drawing (DWG) |
| Product Drawing | Drawing (DWG) |
| Drawings |
|---|
| Product Drawing Drawing (DWG) |
| Product Drawing Drawing (DWG) |
| Product Drawing Drawing (DWG) |
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| Type | Resource | Publication |
|---|---|---|
| General | Selection Guide | 1756-SG001 |
| General | Technical Detail | -- |
| General | Product Cutsheet | -- |
| Technical Data | 1756-td002_-en-e | 1756-TD002 |
Looking for more documentation?
Find curated technical documentation for this product in the Technical Documentation Center, or search our full Literature Library.
Visit the Technical Documentation Center
Search the Literature Library
Available Downloads
- EDS files for 1756-CFM (multi)
- EDS files for ControlLogix Family (multi)
- Firmware for 1756-CFM v3.011
- AOP - Add On Profiles for 1756-CFM v40.10.06
- AOP - Add On Profiles for 1756-CFM v40.10.07
- UL Listed
- ATEX
- UL Listed Hazardous
- IECEx Scheme
- China CCC
- Australian RCM
- CE
This product was certified with the above certifications as of 2025-07-19. Products sold before or after this date might carry different certifications. Please review the product label to check for the certifications your specific product carries.
Looking for more Technotes?
Find questions and answers from Rockwell Automation technical experts for this product in our Knowledgebase.
Search Knowledgebase
Technical Specifications
| Suitable for safety functions |
False
|
|---|---|
| Digital inputs configurable |
True
|
| Digital outputs configurable |
False
|
| Voltage type of supply voltage |
DC
|
| Type of electric connection |
Screw connection
|
| Total backplane power |
1.7 W
|
| Thermal dissipation |
20.4 btu/h
|
| Current draw |
300mA @ 5.1V, 16mA @ 24V
|
| Module keying |
Electronic, software configurable
|
| Outputs |
2 current sourcing
|
| Power dissipation, max |
6 W @ 60 °C (140 °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 |
False
|
| Short-circuit protection, outputs available |
False
|
| High resolution, max |
100 khz
|
| Frequency |
Resolution: 0.0005 Hz
|
| Slot width |
1
|
|---|---|
| RTB keying |
User-defined mechanical
|
| Shock |
Operating: 30 G, Non operating: 50 G
|
| Vibration |
2 G @ 10...500 Hz
|
| Surrounding air temperature, max |
60 °C
|
|---|---|
| North American temperature code |
T4
|
| 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 |
±4kV @ 5kHz on unshielded output and power ports, ±4kV @ 5kHz on shielded input ports
|
| Operating temperature |
0 to 60 °C
|
| Surge transient immunity |
±1 kV line-line (DM) and ±2 kV line-earth (CM) on unshielded output and power ports, ±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 °C
|
| On-state voltage drop, max |
0.6 Ω x current
|
|---|---|
| Off-state leakage current, max |
<300 µA @ 31.2V DC
|
| Reverse polarity protection |
Outputs only
|
| Output switching time |
<50 µs turn on, <300 µs turn off, Outputs triggered by Total, all other “turn-on” and “turn-off” times <1 ms
|
| Output control |
Any number of outputs is assignable to any of two flowm channels each output can have 2 “turn-on” and “turn-off” 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 kΩ ±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 |
±30V, selectable input thresholds of 50mV @ 1.3V and 4V: ±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 |
True
|
|---|---|
| Enclosure type |
None (open-style)
|
Drawings
| Drawings | |
|---|---|
| Product Drawing | Drawing (DWG) |
| Product Drawing | Drawing (DWG) |
| Product Drawing | Drawing (DWG) |
| Drawings |
|---|
| Product Drawing Drawing (DWG) |
| Product Drawing Drawing (DWG) |
| Product Drawing Drawing (DWG) |
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Documents
|
Selection Guide
General
1756-SG001 |
|
Technical Detail
General
-- |
|
Product Cutsheet
General
-- |
|
1756-td002_-en-e
Technical Data
1756-TD002 |
| Type | Resource | Publication |
|---|---|---|
| General | Selection Guide | 1756-SG001 |
| General | Technical Detail | -- |
| General | Product Cutsheet | -- |
| Technical Data | 1756-td002_-en-e | 1756-TD002 |
Looking for more documentation?
Find curated technical documentation for this product in the Technical Documentation Center, or search our full Literature Library.
Visit the Technical Documentation Center
Search the Literature Library
Downloads
Available Downloads
- EDS files for 1756-CFM (multi)
- EDS files for ControlLogix Family (multi)
- Firmware for 1756-CFM v3.011
- AOP - Add On Profiles for 1756-CFM v40.10.06
- AOP - Add On Profiles for 1756-CFM v40.10.07
Certifications
- UL Listed
- ATEX
- UL Listed Hazardous
- IECEx Scheme
- China CCC
- Australian RCM
- CE
This product was certified with the above certifications as of 2025-07-19. Products sold before or after this date might carry different certifications. Please review the product label to check for the certifications your specific product carries.
Alternative Products
Technotes
Looking for more Technotes?
Find questions and answers from Rockwell Automation technical experts for this product in our Knowledgebase.
Search Knowledgebase
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