KROHNE MFC85 User Manual

© KROHNE 06/2001

Addendum to
Operating and
Instruction Manual
For Modis Converters

MFC 081/085i

KROHNE Ltd • Rutherford Drive • Park Farm Industrial Estate • Wellingborough • Northamptonshire • NN8 6AE

Tel. [phone] • Fax [phone]• WWW.KROHNE.com

Page 1 of 18

Addendum to Operating and Instruction Manual for “Modis” Converters

Contents

Ex Versions

1. Description………………………………………………………………………….3

2. Output Options …………………………………………………………………….3

3. Power Supplies…………………………………………………………………….4

4. Output Wiring……………………………………………………………………… 5

Non-Ex Modis Converters

5. Description…………………………………………………………………………5

6. Available Versions…………………………………………………………………5

7. Terminal Connections……………………………………………………………..6

Communication Options

8. Supplementary Instructions for PROFIBUS PA ………………………………..7

9. Foundation Fieldbus (Pending)

KROHNE Ltd • Rutherford Drive • Park Farm Industrial Estate • Wellingborough • Northamptonshire • NN8 6AE • UK

Tel. [phone] • Fax [phone]• WWW.KROHNE.com

Page 2 of 18

Addendum to Operating and Instruction Manual for “Modis” Converters

Ex Versions

1. Description

These versions of the converter are suitable for installation in a hazardous area where
intrinsically safe outputs are required.

This converter has passive outputs, which also has the benefit of utilizing the multi-drop
feature of HART®. The outputs are galvanically separated from each other.
Please ensure that you know which converter options you have, to use the correct wiring
diagram.

2. Output Options

The following output options are available:

G. 1 x 4 -20mA and 1 x Pulse output
H. 1 x 4 -20mA and 1 x Status output
K. 1 x 4 -20mA and 1 x Control input

L. 2 x 4-20 mA

M. 1 x 4-20mA and PROFIBUS PA

N. 1 x 4-20mA and Foundation Fieldbus (pending)

Note: HART® is available on the first current output in all cases except options M and N.

Wiring the Converter:

Note:
Supply compartment is
separated from output
terminals

KROHNE Ltd • Rutherford Drive • Park Farm Industrial Estate • Wellingborough • Northamptonshire • NN8 6AE • UK

Tel. [phone] • Fax [phone]• WWW.KROHNE.com

Page 3 of 18

Addendum to Operating and Instruction Manual for “Modis” Converters

Wiring the Power Supply:

Slide the cover to the left to Power supply terminals
Expose the power terminals. covered.

3. Power Supplies:

The converter is available in two options:

A. 24 V AC/DC Switched mode supply
B. 100/230 V AC

24V AC/DC Version 100 – 230V AC Version

11 12 11 12

24V AC/DC

N L
100-230 V

KROHNE Ltd • Rutherford Drive • Park Farm Industrial Estate • Wellingborough • Northamptonshire • NN8 6AE • UK

Tel. [phone] • Fax [phone]• WWW.KROHNE.com

Page 4 of 18

4. Output Wiring:

Option G, H, K Option L Option M, N

I

I

1

⊥

B B 11 12

1

⊥

+

Addendum to Operating and Instruction Manual for “Modis” Converters

I

1

⊥

+

I1I2I

⊥

11 12

2

+

I

I

1

⊥

D D 11 12

1

⊥

+

+

4 - 20 mA 24 V AC/DC

P- P+

or

S- S+

or
C- C+
Depending on function

programmed

or

100-230 VAC

4 - 20 mA

#1

4 - 20 mA

#2

24 V AC/DC

or 100-230 VAC

4 - 20 mA

Fieldbus Foundation

Profibus PA

or

24 V AC/DC

or

100-230 VAC

Non-Ex Versions

5. Description:

This version of converter is similar to the existing Modis converter range but has no Ex
approvals.
It has been introduced to provide the options of Profibus PA, Foundation Fieldbus (planned)
and galvanically isolated outputs for non-Ex environments such as food and pharmaceutical
applications.

6. Available Versions:

L 2 x 4-20mA passive output (freely programmable). HART protocol on first output. Both

outputs galvanically separated from each other and the power supply.

M 1 x 4-20mA passive output (freely programmable) and 1 x Profibus PA passive output

(HART protocol not available). Both outputs galvanically separated from each other
and the power supply.

N Like M, but 1x Fieldbus Foundation passive output (pending)
Supply Voltage:
These converters are available with the same two voltage options:

24V AC/DC
100 – 230 V AC

KROHNE Ltd • Rutherford Drive • Park Farm Industrial Estate • Wellingborough • Northamptonshire • NN8 6AE • UK

Tel. [phone] • Fax [phone]• WWW.KROHNE.com

Page 5 of 18

Addendum to Operating and Instruction Manual for “Modis” Converters

7. Terminal Connections:

Option L Option M, N

Programming:
All programming and functions remain as for standard converters as described in the main

instruction manual.

Communication Options
Two options are planned for this converter. PROFIBUS PA is available with Foundation

Fieldbus to follow.

KROHNE Ltd • Rutherford Drive • Park Farm Industrial Estate • Wellingborough • Northamptonshire • NN8 6AE • UK

Tel. [phone] • Fax [phone]• WWW.KROHNE.com

Page 6 of 18