Type 8741

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1.

General technical data

Product properties

Dimensions

Further information can be found in chapter “4. Dimensions” on page 6.

Materials

Seal

FKM or EPDM (depending on gas)

Housing

PC (polycarbonate)

Base block

Aluminium or stainless steel 1.4404/316L

Total weight

Approx. 500 g (aluminium base block)

Configuration management

Further information can be found in chapter “8.3. Configuration management for easy

device replacement” on page 23.

LED display 1.)

RGB LED according to NAMUR NE107

Performance data

Nominal flow range (Q

N)

10 ml/min…160 l/min (N

2)

Maximum operating pressure

(overpressure to atmospheric pressure)

MFM: 10 bar

For MFCs, the maximum operating pressure depends on the medium and nominal valve

size

Measuring accuracy 2.)

± 0.8 % of reading ± 0.3 % FS (under calibration conditions)

Repeatability

± 0.1 % FS

Measuring span

1:50, optional 1:100

Settling time (MFC)/Response time (MFM) (t

95 %)

< 300 ms

Control valve (proportional valve)

Normally closed

Valve orifice

0.05…8 mm

K

VS value range

0.00006…1.1 m3/h

Electrical data

Operating voltage

24 V DC

Power consumption 3.)

1…3 W (as MFM)

Max. 3…19.5 W (as MFC, depending on type of solenoid control valve)

Residual ripple

± 2 %

Voltage tolerance

± 10 %

Electrical connection

büS/CANopen variant

Terminal block, 4-pin

Analogue variant

D-Sub 9 4.) or terminal block, 6-pin

Industrial Ethernet variant

2 x RJ45 (switch) 5.)

Modbus RTU variant

D-Sub, 9-pin

Medium data

Operating medium

Neutral, pure gases (others on request)

Calibration medium

Operating medium or air

Medium temperature

- 10 °C…+ 70 °C (- 10 °C…+ 60 °C with oxygen)

Process/Port connection & communication

Analogue interface

4…20 mA, 0…20 mA, 0…10 V or 0…5 V

Input impedance > 20 kΩ (voltage) resp. < 300 Ω (current)

Maximum current: 10 mA (voltage output)

Maximum load: 600 Ω (current output)

Digital communication interface

büS/CANopen, Modbus RS485/RTU list 0 and list 1, Industrial Ethernet: EtherCAT®,

EtherNet/IP, Modbus TCP, PROFINET

Port connection

NPT ¼, G ¼, sub-base, compression fitting or vacuum fitting (others on request)

Approvals and conformities

Protection class

IP20

Material certificate

Material certificate 3.1 (on request)

North America (USA/Canada)

Further information can be found in chapter “2.4. North America (USA/Canada)” on

page 5.

Foods and beverages/Hygiene

Further information can be found in chapter “2.5. Foods and beverages/Hygiene” on

page 5.

Oxygen

Further information can be found in chapter “2.6. Oxygen” on page 6.

Environment and installation

Installation position

Horizontal or vertical

Ambient temperature

- 10…+ 50 °C (higher temperatures on request)