KROHNE OPTISWIRL 4200 Wiring diagram

Vortex flowmeter
Equipment protection level EPL Gb / Db
in type of protection Flameproof enclosure "d" and
in type of protection Equipment dust-ignition protection by enclosure "t"
OPTISWIRL 4200
OPTISWIRL 4200OPTISWIRL 4200
OPTISWIRL 4200 Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 01/2019 - 4007443601 - AD OPTISWIRL4200 EAC Exd R01 en

CONTENTS
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OPTISWIRL 4200
1 Safety instructions 3
1.1 General notes ................................................................................................................... 3
1.2 TR CU 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 ........................................................................................................ 8
2.5 Types of protection ........................................................................................................... 8
2.6 Ambient temperature / temperature classes................................................................ 10
2.7 Surface temperature for equipment protection level Db .............................................. 16
2.8 Electrical data................................................................................................................. 17
3 Installation 18
3.1 Mounting ......................................................................................................................... 18
3.2 Special conditions........................................................................................................... 19
4 Electrical connections 20
4.1 General notes ................................................................................................................. 20
4.2 Power supply .................................................................................................................. 22
4.3 Inputs / Outputs .............................................................................................................. 22
4.4 Grounding and equipotential bonding............................................................................ 23
4.5 Flow sensor circuits (remote version only) ................................................................... 25
5 Operation 26
5.1 Start-up........................................................................................................................... 26
5.2 Operation ........................................................................................................................ 26
5.3 Electrostatic charge .......................................................................................................27
6 Service 28
6.1 Maintenance ................................................................................................................... 28
6.2 Dismantling .................................................................................................................... 28
7 Notes 30

SAFETY INSTRUCTIONS 1
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1.1 General notes
This additional instruction applies to explosion-protected versions of vortex flowmeters with
protection type flameproof enclosure "d", increased safety "e" and equipment dust-ignition
protection through enclosure "t", equipment protection level EPL Gb and EPL Db.
It completes the standard manual for the non-explosion protected versions.
The information given in this instruction contains only the data relevant to explosion protection.
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 TR CU conformity
Conformity of the vortex flowmeter for use in hazardous areas was tested in accordance with the
Custom Union Technical Regulation TR CU 012/2011.
The number of the certificate is:
1.3 Approval according to the IECEx scheme
Conformity 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 IECEx 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 IECEx certificate can be downloaded from the manufacturer's website.
TC RU C-DE.AA87.B.01095
TC RU C-DE.AA87.B.01095TC RU C-DE.AA87.B.01095
TC RU C-DE.AA87.B.01095
IECEx KIWA 15.0021X
IECEx KIWA 15.0021XIECEx KIWA 15.0021X
IECEx KIWA 15.0021X

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 for connecting to a
Foundation Fieldbus or Profibus PA. Signal converters with signal output have a separate binary
output and a separate current input.
2.2 Description code
The safety description code consists of the following elements*:
Figure 2-1: Safety description code for the compact version
1 Product designation
2 Type series
3 Compact version
4 Electrical signal output
free - current output 4...20 mA with optional HART
®
communication
FF - Foundation Fieldbus bus connection
PA - Profibus PA bus connection
5 Ex - explosion-protected version
Figure 2-2: Safety description code for the signal converter of the 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
FF - Foundation Fieldbus bus connection
PA - Profibus PA bus connection
5 Sensor electronics VFC 020
6 Ex - explosion-protected version

2 DEVICE DESCRIPTION
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* positions which are not needed are omitted (no blank positions)
The remote version consisting of the flow sensor OPTISWIRL 4000 F and the signal converter
VFC 200 F 020 is called the OPTISWIRL 4200 F.
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 versions 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.
Figure 2-3: Safety description code for the flow sensor of the remote version
1 Product designation
2 Type series of flow sensor
3 Remote version
Figure 2-4: Example of a nameplate for the compact version
1 Device version OPTISWIRL 4200 C
2 Production order number
3 Serial number
4 Year of manufacture
5 Ex data according to notified body
6 Pressure and temperature data
7 Electrical connection data
8 Safety instructions, disposal and data matrix
9 Symbol for region (e.g. Russia)

DEVICE DESCRIPTION 2
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Figure 2-5: Example of the nameplates for the remote version
1 Device version VFC 200 F .. 020 / OPTISWIRL 4000 F
2 Production order number
3 Serial number
4 Year of manufacture
5 Ex data according to notified body
6 Pressure and temperature data
7 Electrical connection data
8 Safety instructions, disposal and data matrix
9 Symbol for region (e.g. Russia)

2 DEVICE DESCRIPTION
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2.4 Flammable products
Atmospheric conditions:
Atmospheric conditions:Atmospheric conditions:
Atmospheric conditions:
The standard atmospheric conditions under which it may be assumed that Ex equipment can be
operated are:
•Temperature: -20...+60°C / -4...+140°F
•Pressure: 80...110 kPa (0.8...1.1 bar) / 11.6...15.9 psi
•Air with normal oxygen content, typically 21%v/v
Ex equipment operating outside the standard temperature range must be tested and certified
(e.g. for ambient temperature range -40...+65°C / -40...+149°F).
Ex equipment operating outside the standard atmospheric pressure range and standard oxygen
content is not permitted.
Operating conditions:
Operating conditions:Operating conditions:
Operating conditions:
Vortex flowmeters operate outside the standard atmospheric pressure range, which means that
explosion protection, regardless of the zone assignment, is fundamentally not applicable for the
measuring unit (piping).
2.5 Types of protection
Explosion protection of vortex flowmeter is provided due to fulfilment of requirements
of the following standards:
•GOST 31610.0-2014 (IEC 60079-0:2011) - Explosive atmospheres. Part 0. Equipment. General
requirements
•GOST IEC 60079-1-2013, GOST IEC 60079-1-2011 - Explosive atmospheres.
Part 1: Equipment protection by flameproof enclosures "d"
•GOST 31610-7-2012 (IEC 60079-7:2006) - Electrical apparatus for explosive gas atmospheres.
Part 7. Increased safety "e"
•GOST 31610.11-2014 (IEC 60079-11:2011) - Explosive atmospheres -
Part 11: Equipment protection by intrinsic safety "i"
•GOST IEC 60079-31-2013 - Explosive atmospheres. Part 31. Equipment dust ignition
protection by enclosure "t"
The following types of protection are used:
•Electronics compartment: "d" or "t"
"d" or "t""d" or "t"
"d" or "t"
•Terminal compartment: either "d" or "e" or "t"
either "d" or "e" or "t"either "d" or "e" or "t"
either "d" or "e" or "t"
•Flow sensor: "i"
"i""i"
"i"
CAUTION!
Operation with flammable products is only permitted as long as no explosive fuel/air mixture
builds up inside of the piping at the same time the atmospheric conditions are exceeded.
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 piping.

DEVICE DESCRIPTION 2
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The marking for equipment EPL Gb is:
1Ex db ia IIC T6...T2 Gb X
1Ex db ia IIC T6...T2 Gb X1Ex db ia IIC T6...T2 Gb X
1Ex db ia IIC T6...T2 Gb X (compact version)
or
1Ex db e ia IIC T6...T2 Gb X
1Ex db e ia IIC T6...T2 Gb X1Ex db e ia IIC T6...T2 Gb X
1Ex db e ia IIC T6...T2 Gb X (compact version)
1Ex db [ia] IIC T6 Gb X
1Ex db [ia] IIC T6 Gb X1Ex db [ia] IIC T6 Gb X
1Ex db [ia] IIC T6 Gb X (signal converter in remote version)
or
1Ex db e [ia] IIC T6 Gb X
1Ex db e [ia] IIC T6 Gb X1Ex db e [ia] IIC T6 Gb X
1Ex db e [ia] IIC T6 Gb X (signal converter in remote version)
1Ex ia IIC T6...T2 Gb X
1Ex ia IIC T6...T2 Gb X1Ex ia IIC T6...T2 Gb X
1Ex ia IIC T6...T2 Gb X (flow sensor in remote version)
The marking for equipment EPL Db is:
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 X
C Db XC Db X
C Db X (compact version)
Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70°C Db X
C Db XC Db X
C Db X (signal converter in remote version)
Ex ia IIIC T70
Ex ia IIIC T70Ex ia IIIC T70
Ex ia IIIC T70°C...T240
C...T240C...T240
C...T240°C Db X
C Db XC Db X
C Db X (flow sensor in remote version)
The marking contains the following information:
1
11
1Gas explosion protection for zone 1
Ex db
Ex dbEx db
Ex db Protection type "Flameproof enclosure"
Ex e
Ex eEx e
Ex e Protection type "Increased safety" (terminal compartment)
Ex tb
Ex tbEx tb
Ex tb Protection type "Equipment - dust ignition protection by enclosure"
Ex ia
Ex iaEx ia
Ex ia Protection type "Intrinsic safety", protection level "ia" (flow sensor, 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 group, suitable for groups IIIC, IIIB and IIIA
T6...T2
T6...T2T6...T2
T6...T2 Temperature class range, suitable for temperature class T1...T6
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...T240
C...T240C...T240
C...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 and zone 2
Db
DbDb
Db EPL, suitable for zone 21 and zone 22
X
XX
XIndication of special conditions for safe use
Table 2-1: Description of the marking

2 DEVICE DESCRIPTION
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2.6 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
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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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.
Max. permissible product and ambient temperatures with signal converter or
connection box mounted above the flow sensor
Figure 2-6: Signal converter above the flow sensor
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 1200 200 1165 1240 200 1165 1
DN40…50 80 65 100 100 135 135 1200 175 1150 1240 175 1150 1
DN65…100 80 65 100 100 1135 1130 1200 150 1130 1235 1150 1130 1
DN150...300 75 65 100 100 135 135 1200 185 1155 1240 185 1155 1
Table 2-2: Temperature class in °C
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 1392 392 1329 1464 392 1329 1
DN40…50 176 149 212 212 275 275 1392 347 1302 1464 347 1302 1
DN65…100 176 149 212 212 1275 1266 1392 302 1266 1455 1302 1266 1
DN150...300 167 149 212 212 275 275 1392 365 1311 1464 365 1311 1
Table 2-3: Temperature class in °F
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 with signal converter or
connection box mounted at side or underneath the flow sensor
Figure 2-7: Signal converter at side of the flow sensor
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 1240 240 240 1
DN40…50 80 65 100 100 135 135 200 200 200 1240 240 240 1
DN65…100 85 65 100 100 135 135 1200 200 1200 1240 240 1240 1
DN150...300 80 65 100 100 135 135 200 200 200 1240 240 240 1
Table 2-4: Temperature class in °C
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 1464 464 464 1
DN40…50 176 149 212 212 275 275 392 392 392 1464 464 464 1
DN65…100 185 149 212 212 275 275 1392 392 1392 1464 464 1464 1
DN150...300 176 149 212 212 275 275 392 392 392 1464 464 464 1
Table 2-5: Temperature class in °F
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 / signal converters or connection box mounted above the flow sensor
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 1120
1
115
1
120 120
1
115
1
120 120
1
115
1
DN40…50 70 65 100 95 1115
1
105
1
120 115
1
105
1
120 115
1
105
1
DN65…100 70 65 100
1
90 1105
1
95 1120 105
1
95 1120 105
1
95 1
DN150...300 65 65 95 90 1120
1
110
1
120 120
1
110
1
120 120
1
110
1
Table 2-6: Temperature class in °C
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
Table 2-7: Temperature class in °F
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 / signal converters or connection box mounted at side or underneath the flow
sensor
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 1120 120 120 1120 120 120 1
DN40…50 65 65 85 80 120 1120 1120 120 1120 1120 120 1120 1
DN65…100 65 65 95 90 1120 1120 1120 120 1120 1120 120 1120 1
DN150...300 65 65 85 85 120 120 1120 120 120 1120 120 120 1
Table 2-8: Temperature class in °C
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 1248 248 248 1248 248 248 1
DN40…50 149 149 185 176 248 1248 1248 248 1248 1248 248 1248 1
DN65…100 149 149 203 248 1248 1248 1248 248 1248 1248 248 1248 1
DN150...300 149 149 185 248 248 248 1248 248 248 1248 248 248 1
Table 2-9: Temperature class in °F
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 with signal converter in stainless
steel (bright) or connection box in stainless steel (bright) mounted above the flow
sensor
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 75 65 100 100 135 135 1200 170 1145 1225 170 1145 1
DN40…50 75 65 100 100 1135 1130 1200 150 1130 1235 150 1130 1
DN65…100 75 65 100 100 1135 1115 1195 1135 1115 1195 1135 1115 1
DN150...300 75 65 100 100 1135 1135 1200 155 1135 1230 155 1135 1
Table 2-10: Temperature class in °C
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…25 167 149 212 212 275 275 1392 338 1293 1437 338 1293 1
DN40…50 167 149 212 212 1275 1266 1392 302 1266 1455 302 1266 1
DN65…100 167 149 212 212 1274 1239 1383 1274 1239 1383 1274 1239 1
DN150...300 167 149 212 212 1275 1275 1392 311 1275 1446 311 1275 1
Table 2-11: Temperature class in °F
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 with signal converter in stainless
steel (bright) or connection box in stainless steel (bright) mounted at side or
underneath the flow sensor
2.7 Surface temperature for equipment protection level Db
For use in areas with combustible 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 layer.
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 85 65 100 100 135 135 200 200 200 1240 240 240 1
DN40…50 75 65 100 100 135 135 1200 200 200 1240 235 1225 1
DN65…100 85 65 100 100 135 135 1200 200 1200 1240 240 1225 1
DN150...300 75 65 100 100 135 135 200 200 200 1240 240 235 1
Table 2-12: Temperature class in °C
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 1464 464 464 1
DN40…50 167 149 212 212 275 275 1392 392 392 1464 455 1437 1
DN65…100 185 149 212 212 275 275 1392 392 1392 1464 464 1437 1
DN150...300 167 149 212 212 275 275 392 392 392 1464 464 455 1
Table 2-13: Temperature class in °F
1Permanent service temperature of connecting cable and cable entry min. 176°F

DEVICE DESCRIPTION 2
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2.8 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 safety value of U
m
= 253 V is considered for the power supply units.
Flow sensor circuits
Flow sensor circuitsFlow sensor circuits
Flow sensor circuits
For the compact versions, the intrinsically safe flow sensor circuits are designed as internal
circuits.
For the remote versions, the intrinsically safe flow sensor circuits are led through. The
maximum permissible safety values of the flow sensor circuits are listed below:
Remote signal converter, flow sensor circuit (terminal 1 to 7, colour-coded)
Remote signal converter, flow sensor circuit (terminal 1 to 7, colour-coded)Remote signal converter, flow sensor circuit (terminal 1 to 7, colour-coded)
Remote signal converter, flow sensor circuit (terminal 1 to 7, colour-coded)
U
o
=6.65V;I
o
= 1107 mA; P
o
= 650 mW; C
o
=1.5µF; L
o
=73µH
Remote flow sensor (terminal 1 to 7, colour-coded)
Remote flow sensor (terminal 1 to 7, colour-coded)Remote flow sensor (terminal 1 to 7, colour-coded)
Remote flow sensor (terminal 1 to 7, colour-coded)
U
i
=7V;I
i
= 1107 mA; P
i
= 650 mW; C
i
=0;L
i
=0
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 4...20 mA
OPTISWIRL 4200 C FF Ex
1Bus connection A1, A2
B1, B2
9...32 VDC 20 mA
OPTISWIRL 4200 C PA Ex
VFC 200 F PA 020 Ex 2
Table 2-14: Maximum values for signal circuits
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.
INFORMATION!
The verification of intrinsic safety for the interconnection between the flow sensor an the signal
converter is not necessary, if the cable length does not exceed 50 m / 164 ft and the supplied
cable is used.

3 INSTALLATION
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3.1 Mounting
Mounting and setup must be carried out according to the applicable installation standards
(e.g. IEC 60079-14) by qualified personnel trained in explosion protection.
The information given in the manual and these instructions must always be observed.
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 for the remote versions may be aligned on the base
or the wall bracket up to a maximum of ±180 . For this reason, the M4 hexagon socket screw
connecting the base and the signal converter or the connection box must be loosened. Once the
signal converter or 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 the 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.
Figure 3-1: Aligning the signal converter
1 M4 hexagon socket screw on connection housing

INSTALLATION 3
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OPTISWIRL 4200
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3.2 Special conditions
Flameproof joints in the housing
The housing must be replaced if there is any damage to the joint area. The flameproof thread
gaps and the cylindrical joint between the terminal and the electronics compartments must be
inspected visually after opening.
Electrostatics
For painted versions, risks due to electrostatic charge must be minimized.
For further information refer to
Electrostatic charge on page 27.
Thermal and electrical data
Observe the maximum ambient and product temperatures and electrical data. For further
information refer to
Ambient temperature / temperature classes on page 10 and refer to Surface
temperature for equipment protection level Db
on page 16 and refer to Electrical data on page
17.
WARNING!
Repairs of the flameproof joints are not allowed.

4 ELECTRICAL CONNECTIONS
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OPTISWIRL 4200
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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" or "e" or in protection type "t".
Unused entries are to be closed in accordance with IEC 60079-1, IEC 60079-7 or IEC 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 IEC 60079-1. Observe the requirements of the
test certificate for the cable glands.
or
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. 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 IEC 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 IEC 60079-31.
Observe the requirements of the test certificate for the cable glands.