1756-CFM

Specifications

Conducted RF immunity

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

Count range, max

2, 147, 483, 647

Current draw

300mA @ 5.1V, 16mA @ 24V

Digital inputs configurable

1

Digital outputs configurable

0

EFT/B immunity

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

Emissions

IEC 61000-6-4

Enclosure type

None (open-style)

ESD immunity

6 kV contact discharges, 8 kV air discharges

Filtering (inputs F0 & F1)

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

Flowmeter input impedance

5 kΩ ±30% resistive

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

Frequency

Resolution: 0.0005 Hz

Gate input on-state current, min

4 mA

Gate input on-state current, nom

15 mA

Gate input voltage range

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

High resolution, max

100 khz

Input frequency, max

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

Input sampling period

User selectable

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

Mechanical filter debouncing (Z0 & Z1 Inputs)

Software selectable

Module keying

Electronic, software configurable

Nonoperating temperature

-40 °C

North American temperature code

T4

Off-state leakage current, max

<300 µA @ 31.2V DC

On-state voltage drop, max

0.6 Ω x current

Operating temperature

0 to 60 °C

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 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.)

Outputs

2 current sourcing

Output short circuit protection

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

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 type

IEC 1 A 24V DC

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

Output voltage source

Customer supplied

Overload current

Electronic (<4 A)

Power dissipation, max

6 W @ 60 °C (140 °F)

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

Redundancy

0

Relative humidity

5...95% noncondensing

Reverse polarity protection

Outputs only

RTB keying

User-defined mechanical

Shock

Operating: 30 G, Non operating: 50 G

Short-circuit protection, outputs available

0

Slot width

1

Suitable for safety functions

0

Surge current

2 A @ 50 ms, repeatable every 2s

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

Surrounding air temperature, max

60 °C

Thermal dissipation

20.4 btu/h

Total backplane power

1.7 W

Totalizer fill and prover

1

Type of electric connection

Screw connection

Vibration

2 G @ 10...500 Hz

Voltage type of supply voltage

DC

Wire category

2 on signal ports, 1 on power ports

Bulletin

1756

Series

B

Lifecycle Status

Active