Type 8745

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1.

General technical data

1.1. General

Product properties

Dimensions

Further information can be found in chapter “4. Dimensions” on page 7.

Material

Seal

FKM or EPDM (depending on gas) 1.)

Housing

PC (polycarbonate)

Base block

Aluminium or stainless steel 1.4404/316L

Configuration management

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

device replacement” on page 25.

Electrical data

Operating voltage

24 V DC

Residual ripple

± 2 %

Voltage tolerance

± 10 %

Electrical connection

Analogue variant

D-Sub 9 2.) or terminal block, 6-pin

Industrial Ethernet variant

2 x RJ45 (Switch) 3.)

Modbus RTU variant

D-Sub 9

Medium data

Operating medium

Neutral, pure gases (others on request)

Calibration medium

Operating medium or air

Medium temperature

- 10 °C 4.)…+ 70 °C (- 10 °C 4.)…+ 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) or < 300 Ω (current)

Maximum current: 10 mA (voltage output)

Maximum load: 600 Ω (current output)

Digital communication interface

Modbus RS485/RTU list 0 and list 1, Industrial Ethernet: EtherCAT®, EtherNet/IP,

Modbus TCP, PROFINET (all digitally via fieldbus)

Port connection

G or NPT ¼", ⅜", ½", ¾", 1", sub-base

Environment and installation

Installation position

Horizontal or vertical

Ambient temperature

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

Accessories

Software

Bürkert Communicator

Further information can be found in chapter “8.1. Bürkert Communicator software” on

page 24.

1.) In addition, when using the electromotive proportional valve:

- Type 3280 DN4: PEEK valve seat seal

- Type 3285: Al

2O3 valve seat seal

2.) An additional digital input and a relay output are available for the analogue variant with D-Sub 9.

3.) Supply voltage via separate terminal block

4.) When using an electromotive proportional valve, the minimum medium temperature is 0 °C.

1.2. Variant with electromagnetic proportional valve

Type 8745 can be configured as MFM or MFC as required. The MFC variant uses direct-acting proportional valves of the 287x series. These

electromagnetic proportional valves are normally closed and stand for highest measuring accuracy and repeatability with settling times

resp. response times of a few hundred milliseconds.

Product properties

Dimensions

Further information can be found in chapter “1.2. Variant with electromagnetic

proportional valve” on page 4.

Total weight

Approx. 1800 g (aluminium, 16 W valve)

Approx. 3100 g (stainless steel 1.4404/316L, 16 W valve)

LED display 1.)

RGB-LED based on NAMUR NE107

Control valve (proportional valve)

Normally closed

Valve orifice

0.8…12 mm

K

VS value range

0.02…2.5 m3/h