KROHNE OPTISWIRL 4200 Series Wiring diagram

Vortex flowmeter
Equipment category II 2G and II 2D, EPL Gb and Db
in protection type Flameproof enclosure Ex-d and
in protection type Increased safety Ex-e and
in protection type Equipment - dust ignition protection through enclosure Ex-t
OPTISWIRL 4200
OPTISWIRL 4200OPTISWIRL 4200
OPTISWIRL 4200 Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 08/2016 - 4005002601- AD OPTISWIRL4200 Ex-II2GD R01 en

CONTENTS
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OPTISWIRL 4200
1 Safety instructions 3
1.1 General notes ................................................................................................................... 3
1.2 EU conformity ................................................................................................................... 3
1.3 Approval according to the IECEx scheme ........................................................................ 3
1.4 Safety instructions............................................................................................................ 4
2 Device description 5
2.1 Device description ............................................................................................................ 5
2.2 Description code............................................................................................................... 5
2.3 Marking............................................................................................................................. 6
2.4 Flammable products ........................................................................................................ 7
2.5 Equipment category / EPL................................................................................................ 7
2.6 Protection types................................................................................................................ 8
2.7 Ambient temperature / temperature classes.................................................................. 9
2.8 Surface temperature for equipment category II 2 D...................................................... 14
2.9 Electrical data................................................................................................................. 15
3 Installation 17
3.1 Mounting ......................................................................................................................... 17
3.2 Special conditions........................................................................................................... 18
4 Electrical connections 19
4.1 General notes ................................................................................................................. 19
4.2 Power supply .................................................................................................................. 20
4.3 Inputs/Outputs................................................................................................................ 20
4.4 Grounding and equipotential bonding............................................................................ 21
4.5 Flow sensor circuits (remote version only) ................................................................... 22
5 Operation 23
5.1 Start-up........................................................................................................................... 23
5.2 Operation ........................................................................................................................ 23
5.3 Electrostatic charge .......................................................................................................23
6 Service 24
6.1 Maintenance ................................................................................................................... 24
6.2 Dismantling .................................................................................................................... 24
7 Notes 26

SAFETY INSTRUCTIONS 1
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1.1 General notes
These additional instructions apply to explosion protected versions of vortex flowmeters in
protection type Flameproof enclosure "d", Increased safety "e" and Equipment-dust ignition
protection through enclosure "t", equipment category II 2 G and II 2 D, EPL Gb and EPL Db. They
complete the standard documentation for the non-explosion protection versions.
The information given in this instruction contains only the data relevant to explosion protection
of category 2. The technical details given in the manual for the non-explosion protected versions
remain unchanged unless they will be excluded or replaced by this instruction.
1.2 EU conformity
The manufacturer declares with the EU declaration of conformity on his own responsibility
conformity with the protection goals of directive 2014/34/EU for use in hazardous areas with gas
and dust.
Conformity with harmonised standards was checked by a notified body in accordance with
EN 60079-0:2012, EN 60079-1:2014, EN 60079-7:2007, EN 60079-11:2012 and EN 60079-31:2014.
The EU declaration of conformity for the equipment category II 2 G and II 2 D is based on the EU
type examination certificate:
The "X" after the certificate number refers to special conditions for safe use of the device, which
have been listed in these instructions.
If needed the EU type examination certificate can be downloaded from the manufacturer's
website.
1.3 Approval according to the IECEx scheme
Conformity of the vortex flowmeter for use in hazardous areas with gas and dust was tested in
accordance with the "IECEx Certification Scheme for Explosive Atmospheres" according to
IEC 60079-0:2011, IEC 60079-1:2014, IEC 60079-7:2006, IEC 60079-11:2011 and
IEC 60079-31:2013. The number of the IEC certificate is:
The "X" after the certificate number refers to special conditions for safe use of the device, which
have been listed in these instructions.
If needed, the IEC certificate can be downloaded from the manufacturer's website.
KIWA 14 ATEX 0016 X
KIWA 14 ATEX 0016 XKIWA 14 ATEX 0016 X
KIWA 14 ATEX 0016 X
IECEx KIWA 15.0021 X
IECEx KIWA 15.0021 XIECEx KIWA 15.0021 X
IECEx KIWA 15.0021 X

1 SAFETY INSTRUCTIONS
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1.4 Safety instructions
If these instructions are not followed, there is a risk of explosion.
Assembly, installation, start-up and maintenance may only be performed by personnel trained in
explosion protection!
CAUTION!
Operating conditions and place of installation may require compliance with additional standards,
directives or laws. The responsibility for compliance rests solely with the operator or his agent.

DEVICE DESCRIPTION 2
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2.1 Device description
Vortex flowmeters measure and display the flow of flammable and non-flammable gases and
liquids. The signal converter includes either a 4...20 mA signal output with optional HART
®
communication or a bus connection. There are bus connections available according to the FISCO
model for connecting to the Foundation Fieldbus or Profibus PA. Signal converters with signal
output have a remote binary output and a remote current input.
2.2 Description code
The safety description code * consists of the following elements:
* positions which are not needed are omitted (no blank positions)
The remote version consisting of the flow sensor OPTISWIRL 4000 and the signal converter
VFC 200 F 020 is called the OPTISWIRL 4200 F.
Compact device
1 Product designation
2 Type series
3 Compact measuring device
4 Electrical signal output
Free - current output 4...20 mA with optional HART
®
communication or
FF - Foundation FIELDBUS bus connection or
PA - PROFIBUS PA bus connection
5 Explosion-protected version
Signal converter - remote version
1 Product designation
2 Type series
3 Remote version
4 Electrical signal output
Free - current output 4...20 mA with optional HART
®
communication or
FF - Foundation FIELDBUS bus connection or
PA - PROFIBUS PA bus connection
5 Sensor electronics VFC 020
6 Explosion-protected version
Flow sensor - remote version
1 Product designation
2 Type series of flow sensor
3 Remote version

2 DEVICE DESCRIPTION
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2.3 Marking
The marking of the devices in accordance with the description code is shown on the nameplates
below. On both the compact devices and the remote versions, the main plate is located on the
signal converter housing. On the remote versions there is an additional marking on the flow
sensor.
Compact devices with two signal converters for dual measurement (Dual Version) are each
marked with a nameplate, which is attached to each of the signal converter housings. The details
relevant to explosion protection are identical on both nameplates.
1 Device version OPTISWIRL 4200 C or VFC 200 F .. 020 / OPTISWIRL 4000 F
2 Production order number
3 Serial number
4 Year of manufacture
5 Marking acc. to KIWA 14 ATEX 0016 X or IECEx KIWA 15.0021 X
6 Permissible ambient temperature range
7 Electrical connection data
8 Observe the safety instructions
9 Internet address of the manufacturer

DEVICE DESCRIPTION 2
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2.4 Flammable products
Atmospheric conditions
An explosive atmosphere is a mixture of air and flammable gases, vapours, mists or dusts under
atmospheric conditions.
It is defined by the following values T
atm
= -20...+60°C / -4...+140°F and P
atm
= 0.8...1.1 bar /
11.6...15.9 psi.
Outside of this range, for most mixtures no key figures are available for the ignition behaviour.
Operating conditions
Vortex flowmeters operate outside of atmospheric conditions, which means that explosion
protection according to the ATEX directive, regardless of the zone assignment, is fundamentally
not applicable due to the lack of key safety data for the interior of the measuring section.
2.5 Equipment category / EPL
Vortex flowmeters are designed in category II 2 G / II 2 D or EPL Gb and EPL Db according to
EN 60079-0, EN 60079-1 and EN 60079-31 for use in zone 1 or zone 21. The inside of the
measuring unit is also approved for zone 1.
Vortex flowmeters are designed according to the "IECEx-Scheme" acc. to "Equipment Protection
Level [EPL] Gb or [EPL] Db".
CAUTION!
Operation with flammable products is only permitted as long as no explosive fuel/air mixture
builds up on the inside of the flowmeter under operating conditions. The operator is responsible
to ensure that the flowmeter is operated safely in terms of the temperature and pressure of the
products used.
In case of operation with flammable products the measuring units must be included in the
periodic pressure tests of the system.
INFORMATION!
Definition of zone 1 acc. to EN 1127-1, Appendix B:
An area in which an explosive atmosphere, as a result of the mixture of flammable substances in
the form of gas, steam or mist with air, under normal operation may occasionally occur.
Definition of zone 21 acc. to EN 1127-1, Appendix B:
An area in which an explosive atmosphere may occasionally occur in the form of a cloud of
flammable dust in the air under normal operation.

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2.6 Protection types
The following types of protection are used:
Electronics
compartment
Ex db (Gb) or Ex tb (Db)
Ex db (Gb) or Ex tb (Db)Ex db (Gb) or Ex tb (Db)
Ex db (Gb) or Ex tb (Db)
Connection
compartment
either Ex db or Ex eb (Gb) or Ex tb (Db)
either Ex db or Ex eb (Gb) or Ex tb (Db)either Ex db or Ex eb (Gb) or Ex tb (Db)
either Ex db or Ex eb (Gb) or Ex tb (Db)
Flow sensor Ex ia (Gb or Db)
Ex ia (Gb or Db)Ex ia (Gb or Db)
Ex ia (Gb or Db)
The marking for the flameproof version of compact devices is acc. to
ATEX: II 2 G
II 2 GII 2 G
II 2 G
Ex db ia IIC T6...T2 Gb
Ex db ia IIC T6...T2 GbEx db ia IIC T6...T2 Gb
Ex db ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 GbEx db eb ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 Gb
IECEx: Ex db ia IIC T6...T2 Gb
Ex db ia IIC T6...T2 GbEx db ia IIC T6...T2 Gb
Ex db ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 GbEx db eb ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 Gb
The marking for the flameproof version of remote versions is acc. to
ATEX: II 2 G
II 2 GII 2 G
II 2 G Ex db [ia] IIC T6 Gb
Ex db [ia] IIC T6 GbEx db [ia] IIC T6 Gb
Ex db [ia] IIC T6 Gb (signal converter)
Ex db eb [ia] IIC T6 Gb
Ex db eb [ia] IIC T6 GbEx db eb [ia] IIC T6 Gb
Ex db eb [ia] IIC T6 Gb
II 2 G
II 2 GII 2 G
II 2 G Ex ia IIC T6...T2 Gb
Ex ia IIC T6...T2 GbEx ia IIC T6...T2 Gb
Ex ia IIC T6...T2 Gb (flow sensor)
IECEx: Ex db [ia] IIC T6 Gb
Ex db [ia] IIC T6 GbEx db [ia] IIC T6 Gb
Ex db [ia] IIC T6 Gb (signal converter)
Ex db eb [ia] IIC T6 Gb
Ex db eb [ia] IIC T6 GbEx db eb [ia] IIC T6 Gb
Ex db eb [ia] IIC T6 Gb
Ex ia IIC T6...T2 Gb
Ex ia IIC T6...T2 GbEx ia IIC T6...T2 Gb
Ex ia IIC T6...T2 Gb (flow sensor)
The marking for the dustproof version of compact devices is acc. to
ATEX: II 2 D
II 2 DII 2 D
II 2 D
Ex tb ia IIIC T70
Ex tb ia IIIC T70Ex tb ia IIIC T70
Ex tb ia IIIC T70°C...T240
C...T240C...T240
C...T240°C Db
C DbC Db
C Db
IECEx: Ex tb ia IIIC T70
Ex tb ia IIIC T70Ex tb ia IIIC T70
Ex tb ia IIIC T70°C...T240
C...T240C...T240
C...T240°C Db
C DbC Db
C Db
The marking for the dustproof version of remote versions is acc. to
ATEX: II 2 D
II 2 DII 2 D
II 2 D Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70°C Db
C DbC Db
C Db (signal converter)
II 2 D
II 2 DII 2 D
II 2 D Ex ia IIIC T70
Ex ia IIIC T70Ex ia IIIC T70
Ex ia IIIC T70°C...T240
C...T240C...T240
C...T240°C Db
C DbC Db
C Db (flow sensor)
IECEx: Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70°C Db
C DbC Db
C Db (signal converter)
Ex ia IIIC T70
Ex ia IIIC T70Ex ia IIIC T70
Ex ia IIIC T70°C...T240
C...T240C...T240
C...T240°C Db
C DbC Db
C Db (flow sensor)

DEVICE DESCRIPTION 2
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2.7 Ambient temperature / temperature classes
Because of the influence of the temperature of the product, no fixed temperature class is
assigned to vortex flowmeters. The temperature class of these devices is rather a function of the
product temperature and ambient temperature that is present and the specific device version.
The classification is outlined in the following tables.
The tables take into account the following parameters:
•Ambient temperature T
amb
•Product temperature T
m
•Nominal size DN
•Heat resistance of the connecting cable
The marking contains the following information:
The marking contains the following information:The marking contains the following information:
The marking contains the following information:
II
IIII
II Explosion protection, group II
2
22
2Equipment category 2
G
GG
GGas explosion protection
D
DD
DDust ignition protection
Ex db
Ex dbEx db
Ex db Protection type "Flameproof enclosure"
Ex eb
Ex ebEx eb
Ex eb Protection type "Increased safety"
Ex tb
Ex tbEx tb
Ex tb Protection type "Equipment - dust ignition protection through enclosure"
Ex ia
Ex iaEx ia
Ex ia Protection type "Intrinsic safety", protection level "ia" (flow sensor circuit, compact device)
Ex [ia]
Ex [ia]Ex [ia]
Ex [ia] Protection type "Intrinsic safety", protection level "ia" (flow sensor circuit, remote version)
IIC
IICIIC
IIC Gas group, suitable for gas groups IIC, IIB and IIA
IIIC
IIICIIIC
IIIC Dust areas, suitable for groups IIIC, IIIB and IIIA
T6...T2
T6...T2T6...T2
T6...T2 Temperature class range
T70
T70T70
T70°C
CC
CMaximum surface temperature of the signal converter housing without dust coating at
ambient temperature 65°C / 149°F and product temperature 65°C/149°F
T70
T70T70
T70°C...
C...C...
C...
T240
T240T240
T240°C
CC
CMaximum surface temperature of the flow sensor housing without dust coating at ambient temperature 65°C / 149°F (is determined by the product temperature)
Gb
GbGb
Gb EPL, suitable for zone 1
Db
DbDb
Db EPL, suitable for zone 21
INFORMATION!
In principle, operation is possible in all ranges of the temperature classes T1...T6.

2 DEVICE DESCRIPTION
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The permitted ambient temperature range is indicated on the nameplate; depending on the
device version it is T
amb
= -40...+65°C / -40...+149°F.
The minimum product temperature is -40°C/-40°F.
When using in zone 21, observe the maximum permissible product and ambient temperatures
for temperature class 2 and the information for use of a heat-resistant connecting cable and
cable entry.
INFORMATION!
The maximum permissible product temperatures listed in the tables are valid under
the following conditions:
• The measuring device is installed and operated in accordance with the manufacturer's
installation instructions.
• It must be ensured that the flowmeter is not heated by the effects of additional heat radiation
(sunshine, neighbouring system components) and thus operated above the permissible
ambient temperature range.
• Insulation must be limited to the piping. Unobstructed ventilation of the signal converter
must be ensured.

DEVICE DESCRIPTION 2
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Maximum permissible product and ambient temperatures with signal converter or connection
Maximum permissible product and ambient temperatures with signal converter or connectionMaximum permissible product and ambient temperatures with signal converter or connection
Maximum permissible product and ambient temperatures with signal converter or connection
box mounted above the flow sensor
box mounted above the flow sensorbox mounted above the flow sensor
box mounted above the flow sensor
Maximum permissible product and ambient temperatures per temperature class in °C
Maximum permissible product and ambient temperatures per temperature class in °F
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 80 65 100 100 135 135
1
200 200
1
165
1
240 200
1
165
1
DN40…50 80 65 100 100 135 135
1
200 175
1
150
1
240 175
1
150
1
DN65…100 80 65 100 100
1
135
1
130
1
200 150
1
130
1
235
1
150
1
130
1
DN150...300 75 65 100 100 135 135
1
200 185
1
155
1
240 185
1
155
1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 176 149 212 212 275 275
1
392 392
1
329
1
464 392
1
329
1
DN40…50 176 149 212 212 275 275
1
392 347
1
302
1
464 347
1
302
1
DN65…100 176 149 212 212
1
275
1
266
1
392 302
1
266
1
455
1
302
1
266
1
DN150...300 167 149 212 212 275 275
1
392 365
1
311
1
464 365
1
311
1
1Permanent service temperature of connecting cable and cable entry min. 176°F

2 DEVICE DESCRIPTION
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Maximum permissible product and ambient temperatures with signal converter or connection
Maximum permissible product and ambient temperatures with signal converter or connectionMaximum permissible product and ambient temperatures with signal converter or connection
Maximum permissible product and ambient temperatures with signal converter or connection
box mounted at side or underneath the flow sensor
box mounted at side or underneath the flow sensorbox mounted at side or underneath the flow sensor
box mounted at side or underneath the flow sensor
Maximum permissible product and ambient temperatures per temperature class in °C
Maximum permissible product and ambient temperatures per temperature class in °F
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 85 65 100 100 135 135 200 200 200 1 240 240 240 1
DN40…50 80 65 100 100 135 135 200 200 200 1 240 240 240 1
DN65…100 85 65 100 100 135 135 1 200 200 1 200 1 240 240 1 240 1
DN150...300 80 65 100 100 135 135 200 200 200 1 240 240 240 1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 185 149 212 212 275 275 392 392 392 1 464 464 464 1
DN40…50 176 149 212 212 275 275 392 392 392 1 464 464 464 1
DN65…100 185 149 212 212 275 275 1 392 392 1 392 1 464 464 1 464 1
DN150...300 176 149 212 212 275 275 392 392 392 1 464 464 464 1
1Permanent service temperature of connecting cable and cable entry min. 176°F

DEVICE DESCRIPTION 2
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Max. permissible product and ambient temperatures for devices with painted flow sensors /
Max. permissible product and ambient temperatures for devices with painted flow sensors /Max. permissible product and ambient temperatures for devices with painted flow sensors /
Max. permissible product and ambient temperatures for devices with painted flow sensors /
signal converters or connection box mounted above the flow sensor
signal converters or connection box mounted above the flow sensorsignal converters or connection box mounted above the flow sensor
signal converters or connection box mounted above the flow sensor
Maximum permissible product and ambient temperatures per temperature class in °C
Maximum permissible product and ambient temperatures per temperature class in °F
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 70 65 100 95 1 120
1
115
1
120 120
1
115
1
120 120
1
115
1
DN40…50 70 65 100 95 1 115
1
105
1
120 115
1
105
1
120 115
1
105
1
DN65…100 70 65 100
1
90 1 105
1
95 1 120 105
1
95 1 120 105
1
95 1
DN150...300 65 65 95 90 1 120
1
110
1
120 120
1
110
1
120 120
1
110
1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 159 149 212 203
1
248
1
239
1
248 248
1
239
1
248 248
1
239
1
DN40…50 159 149 212 203
1
239
1
221
1
248 239
1
221
1
248 239
1
221
1
DN65…100 158 149 212
1
194
1
221
1
203
1
248 221
1
203
1
248 221
1
203
1
DN150...300 149 149 203 194
1
248
1
230
1
248 248
1
230
1
248 248
1
230
1
1Permanent service temperature of connecting cable and cable entry min. 176°F

2 DEVICE DESCRIPTION
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Max. permissible product and ambient temperatures for devices with painted flow sensors /
Max. permissible product and ambient temperatures for devices with painted flow sensors /Max. permissible product and ambient temperatures for devices with painted flow sensors /
Max. permissible product and ambient temperatures for devices with painted flow sensors /
signal converters or connection box mounted at side or underneath the flow sensor
signal converters or connection box mounted at side or underneath the flow sensorsignal converters or connection box mounted at side or underneath the flow sensor
signal converters or connection box mounted at side or underneath the flow sensor
Maximum permissible product and ambient temperatures per temperature class in °C
Maximum permissible product and ambient temperatures per temperature class in °F
2.8 Surface temperature for equipment category II 2 D
For use in areas with flammable dust it should be noted that the indicated maximum surface
temperature of T70°C at an ambient temperature of 65°C / 149°F and a product temperature of
65°C / 149°F is valid without a dust coating. For higher product temperatures the maximum
surface temperature is defined by the product.
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 65 65 95 90 120 120
1
120 120 120
1
120 120 120
1
DN40…50 65 65 85 80 120
1
120
1
120 120
1
120
1
120 120
1
120
1
DN65…100 65 65 95 90 1 120
1
120
1
120 120
1
120
1
120 120
1
120
1
DN150...300 65 65 85 85 120 120
1
120 120 120
1
120 120 120
1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 149 149 203 194 248 248
1
248 248 248
1
248 248 248
1
DN40…50 149 149 185 176 248
1
248
1
248 248
1
248
1
248 248
1
248
1
DN65…100 149 149 203 248
1
248
1
248
1
248 248
1
248
1
248 248
1
248
1
DN150...300 149 149 185 248 248 248
1
248 248 248
1
248 248 248
1
1Permanent service temperature of connecting cable and cable entry min. 176°F

DEVICE DESCRIPTION 2
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2.9 Electrical data
Signal circuits
Signal circuitsSignal circuits
Signal circuits
The vortex flowmeter signal circuits may only be connected to circuits with the following
maximum values. A U
m
of 253 V is required for the power supply units.
Flow sensor circuits
Flow sensor circuitsFlow sensor circuits
Flow sensor circuits
With the compact device, the intrinsically safe flow sensor circuits are designed as internal
circuits.
When it comes to the remote versions, the intrinsically safe flow sensor circuits are led through.
The maximum permissible values of the flow sensor circuits considered safe are listed below:
Pressure sensor circuit (connector X2.1...X2.5)
Pressure sensor circuit (connector X2.1...X2.5)Pressure sensor circuit (connector X2.1...X2.5)
Pressure sensor circuit (connector X2.1...X2.5)
•U
o
=6.65V
•I
o
=35mA
•P
o
=58mW
•C
o
=2.5µF
•L
o
=0.5mH
Piezo / Temperature sensor circuit (connector X2.7...X2.12)
Piezo / Temperature sensor circuit (connector X2.7...X2.12)Piezo / Temperature sensor circuit (connector X2.7...X2.12)
Piezo / Temperature sensor circuit (connector X2.7...X2.12)
•U
o
=6.65V
•I
o
=21mA
•P
o
=35mW
•C
o
=2.6µF
•L
o
=0.5mH
Device version Circuit
Terminals
Nominal voltage Nominal current
OPTISWIRL 4200 C Ex
VFC 200 F 020 Ex Current output 4...20 mA C1, C2 12...32 VDC 4...20 mA
Binary output
M1, M2, M3, M4 8...32 VDC ≤100 mA
Current input
I1, I2 9...32 VDC 0...20 mA
OPTISWIRL 4200 C FF Ex
VFC 200 F FF 020 Ex 1
Bus connection
D, D- 9...32 VDC 20 mA
OPTISWIRL 4200 C PA Ex
VFC 200 F PA 020 Ex 2
1Further information for operation of the FF transmitter are provided in separate supplementary instructions.
2Further information for operation of the PA transmitter are provided in separate supplementary instructions.

2 DEVICE DESCRIPTION
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Remote circuit (connector X5501)
Remote circuit (connector X5501)Remote circuit (connector X5501)
Remote circuit (connector X5501)
•U
o
=6.65V
•I
o
= 1107 mA
•P
o
= 650 mW
•C
o
=2.5µF
•L
o
=73µH

INSTALLATION 3
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3.1 Mounting
Installation and setup must be carried out according to the applicable installation standards
(e.g. EN 60079-14) by qualified personnel trained in explosion protection. The information given
in the manuals and the supplementary instructions must be observed at all times.
Vortex flowmeters must be installed in such a way that
•no external forces are affecting the indication unit.
•the device is accessible for any necessary visual inspections and can be viewed from all sides.
•the nameplate is clearly visible.
•it can be operated from a location with secure footing.
Aligning the signal converter
The signal converter and the connection box of remote systems may be aligned on the base up to
a maximum of ±180 . For this reason, the M4 hexagon socket screw connecting the base, the
converter and connection box must be loosened. Once the signal converter and the connection
box has been turned, it must be screwed back on to the base again (tightening torque 2 Nm).
•De-energise the signal converter.
•Loosen the hexagon socket screw 1.
•Turn the signal converter or connection box.
•Screw signal converter or connection box back to the base again.
CAUTION!
The manufacturer is not liable for any damage resulting from improper use or use other than the
intended purpose. This applies in particular to hazards due to insufficient corrosion resistance
and suitability of the materials in contact with product.
1Allen screws M4 on connection housing

3 INSTALLATION
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3.2 Special conditions
Equipotential bonding
Vortex signal converters and flow sensors must be included in the equipotential bonding of the
hazardous area.
Lock on electronics and terminal compartment
The electronics and terminal compartment of the vortex flowmeter must be locked during
operation. The covers for the electronics and terminal compartment are secured by a lock. First
manually tighten the covers until the stop. Then loosen the covers (≤90°) so that the lock (special
closure) can be secured in the next possible position in the cover. Use a WS3 Allen key to turn the
screw.
No waiting period is necessary prior to opening the housing.
Flameproof joints in the housing
The housing must be replaced if there is any damage to the joint area. The flameproof threads
and the cylindrical joint between the terminal and the electronics compartments must be
inspected visually after opening.

ELECTRICAL CONNECTIONS 4
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4.1 General notes
Rated values for insulation
•The insulation of the vortex flowmeter OPTISWIRL 4200 . .. - Ex is rated in compliance with
IEC 60 664-1. The following rating parameters are taken into account:
•Overvoltage category for signal and instrument loops: II
•Pollution degree of the insulation: 2
Terminal compartment
The signal circuit is electrically connected in the terminal compartment of the signal converter.
The terminal compartment is designed in protection type "d" and/or "e" or in protection type "t".
Unused entries are to be closed in accordance with EN 60079-1, EN 60079-7 or EN 60079-31.
The entry of the cables in the connection terminal is possible in the following way.
•Device version Ex db ia IIC T6...T2 Gb or Ex db [ia] IIC T6
Direct entry of the connecting cables by way of approved flameproof cable glands (M20x1.5)
into the flameproof terminal compartment (V ≤2000 cm³). The cable glands require a
separate test certificate in accordance with EN 60079-1. Observe the requirements of the test
certificate for the cable glands.
•Device version Ex db ia IIC T6...T2 Gb or Ex db [ia] IIC T6
Direct entry of the connecting cables by way of conduits into the flameproof enclosed
terminal compartment of the device. Once the conduit has been screwed in, it must form a
flameproof joint with the housing with a minimum thread length of 8 mm / 0.3". A suitable
mechanical stopping box must be provided in accordance with installation provisions. The
conduit must be installed in compliance with its separate test certificate.
•Device version Ex db eb ia IIC T6...T2 Gb or Ex db eb [ia] IIC T6
Direct entry of the connecting cables by way of approved cable glands (M20x1.5) into the
terminal compartment in protection type increased safety. The cable glands require a
separate test certificate in accordance with EN 60079-7. Observe the requirements of the test
certificate for the cable glands.
•Device version Ex tb ia IIIC T70...T240 Db or Ex tb [ia] IIIC T70°C Db
Direct entry of the connecting cables by way of approved dustproof cable glands (M20x1.5)
into the dustproof terminal compartment (V ≤2000 cm³). The cable glands require a separate
test certificate in accordance with EN 60079-31. Observe the requirements of the test
certificate for the cable glands.
Connecting cables
The connecting cables should be selected according to the applicable installation standards (e.g.
EN 60079-14 / VDE 0165) and the maximum operating temperature.
The connecting cable between the measuring sensor and wall bracket with remote systems is
part of the supply.
•The connecting cables must be fixed and laid so they are sufficiently protected against
damage.
•Lay cables so as to ensure that there is sufficient distance between surfaces of the
measuring unit and the connecting cable.
•Supplied blind plugs / cable entries guarantee protection against foreign objects and water
(protection category) IP66 / 67 according to EN 60529.
•The outer diameter of the connecting cable must be within the sealing range of the cable
entry (7...12 mm / 0.27...0.47").

4 ELECTRICAL CONNECTIONS
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•Unused cable entries are to be closed in accordance with EN 60079-1 and/or EN 60079-7
and/or EN 60079-31 (>IP66 / 67).
•Before connecting or loosening the equipotential bonding cable, ensure there are no
differences in potential.
Ensure that the gaskets and incised gasket ring are tight.
Connection terminals
The capacity of the connection terminals is 0.5 mm²to 2.5 mm².
The torque of the connection terminals is 0.6 Nm.
4.2 Power supply
The vortex flowmeter does not require a separate power supply. The required supply for the
built-in electronics is provided via the 4...20 mA current output or the bus connection.
4.3 Inputs/Outputs
The terminal assignment of the built-in electrical equipment is described in the standard
documentation. The signal circuits of the vortex flowmeter may only be connected to
downstream devices or circuits that satisfy the requirements of protective extra-low voltage
(PELV).
Connecting power supply and I/O functions
•Before connecting or disconnecting the electrical connection cables of the device, make sure
that all cables leading to the converter are isolated from the ground of the hazardous area.
This also applies to protective earth (PE) and equipotential bonding conductors (PA).
•All connecting cable conductors and shields that are not securely connected to the
equipotential grounding system of the hazardous area shall be carefully isolated from each
other and from ground (test voltage 1500 V
eff
for non-intrinsically safe cables).
CAUTION!
The IP protection category of the signal converter housing is largely determined by the cable
gland used and the installation.