7501QI01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-09-16
Version Revision
V2R0
Page:
2/6
Ex ia
installation
General installation instructions
The sensor circuit is not infallibly galvanic isolated from the supply output circuit. However, the
galvanic isolation between the circuits is capable of withstanding a test voltage of 500Vac during 1
minute.
The enclosure must be connected to the potential matching line.
If the transmitter is physically connected to a possible source of heating or cooling, e.g. by
mounting to a process pipe or a temperature sensor, the temperature at the point of connection
shall be within the ambient temperature range as given in the certificate or in this manual.
Cable entries and blanking elements shall be used that are suitable for the application and correctly
installed.
For installalation in zone 0 / EPL Ga, the transmitter must be installed such, that even in the event
of rare incidents, ignition sources due to impact and friction, sparks are excluded.
Protection degree of IP 54 according to IEC 60529 is achieved if certified cable glands or conduit
entry devices are used that are suitable for the application and correctly installed.
Protection degree of IP 68 according to IEC 60529 is only achieved if certified cable glands or
conduit entry devices are used that are suitable for the application and correctly installed with
sealing washers or Loctite sealant added to the threads of the sensor, blanking elements and cable
glands.
For group III (dust), electrostatic charging of the paint layer shall be avoided.
7501QI01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-09-16
Version Revision
V2R0
Page:
3/6
Ex nA, ic installation:
Certificate IECEx DEK 15.0039 X
Marking
Ex nA IIC T6…T4 Gc
Ex ic IIC T6…T4 Gc
Ex ic IIIC T100°C Dc
Standards: IEC 60079-0: 2011, IEC 60079-11: 2011, IEC 60079-15: 2010
Sensor
Terminal: 3,4,5,6
Ex ic
Uo: 9.6 VDC
Io: 28 mA
Po: 67 mW
Lo: 45 mH
Co: 28 μF
Supply
Terminal: 1,2
Ex ic
Ui: 35 VDC
Li: 0 μH
Ci: 2 nF
Supply
Terminal: 1,2
Ex nA
Umax : 35 VDC
1
2
6
5
4
3
+
-
Supply
7501
Hazardous area
Zone 2, 22
Non Hazardous Area
Type of protection Ex nA
O-ring Sealing : Silicone
T4: -40 ≤ Ta ≤ 85ºC T4 (7501A )
T4: -40 ≤ Ta ≤ 80ºC T4 (7501B )
T6: -40 ≤ Ta ≤ 60ºC T6
O-ring Sealing : FKM
T4: -20 ≤ Ta ≤ 85ºC (7501A )
T4: -20 ≤ Ta ≤ 80ºC (7501B )
T6: -20 ≤ Ta ≤ 60ºC
Type of protection Ex ic
T4: -40 ≤ Ta ≤ 85ºC T100ºC (7501A )
T4; -40 ≤ Ta ≤ 80ºC T100ºC (7501B )
T6: -40 ≤ Ta ≤ 60ºC T85 ºC
7501QI01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-09-16
Version Revision
V2R0
Page:
1/6
7501 IECEx Installation
For safe installation of 7501 the following must be observed. The module shall only be installed by
qualified personnel who are familiar with the national and international laws, directives and
standards (IEC60079-14) that apply to this area.
Year of manufacture can be taken from the first two digits in the serial number.
Ex ia installation:
Certificate IECEx DEK 15.0039 X
Marking
Standards:
IEC 60079-0: 2011, IEC 60079-11: 2011, IEC 60079-26: 2007
Hazardous area
Zone 0, 1, 2, 20, 21, 22, Mines
Non Hazardous Area
T4: -40 ≤ Ta ≤ 85ºC T100 ºC ( 7501A)
T4: -40 ≤ Ta ≤ 80ºC T100 ºC ( 7501B)
T5: -40 ≤ Ta ≤ 60ºC T75 ºC
T6: -40 ≤ Ta ≤ 45ºC T60 ºC
Ex ia IIC T6...T4 Ga
Ex ia IIIC T100°C Da
Ex ia I Ma (7501B )
Sensor
Terminal: 3,4,5,6
Uo: 9.6 VDC
Io: 28 mA
Po: 67 mW
Lo: 35 mH
Co: 3.5 μF
Supply
Terminal: 1,2
Ui: 30 VDC
Ii: 120 mA
Pi: 0.84 W
Li: 0 μH
Ci: 2 nF
1
2
6
5
4
3
+
-
Barrier
7501
7501QI01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-09-16
Version Revision
V2R0
Page:
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Ex d, tb installation:
Certificate IEC DEK 15.0039 X
Marking
Standards:IEC 60079-0: 2011, IEC 60079-1: 2007, IEC 60079-31: 2013
Non Hazardous Area
Hazardous area
Zone 1, 2, 21, 22
Ex d IIC T6…T4 Gb
Ex tb IIIC T100°C Db
Terminal: 3,4,5,6
Sensor: RTD or TC
Terminal: 1,2
Umax: 35 VDC
Type of protection Ex tb
O-ring Sealing : Silicone
-40 ≤ Ta ≤ 85ºC T100°C (7501A )
-40 ≤ Ta ≤ 80ºC T100°C (7501B )
-40 ≤ Ta ≤ 70ºC T85°C
O-ring Sealing : FKM
-20 ≤ Ta ≤ 85ºC T100°C (7501A )
-20 ≤ Ta ≤ 80ºC T100°C (7501B )
-20 ≤ Ta ≤ 70ºC T85°C
1
2
6
5
4
3
+
-
Supply
7501
Type of protection Ex d
T4,T5: -40 ≤ Ta ≤ 85ºC (7501A )
T4,T5: -40 ≤ Ta ≤ 80ºC (7501B )
T6: -40 ≤ Ta ≤ 70ºC
7501QI01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-09-16
Version Revision
V2R0
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Ex nA, ic installation:
For an ambient temperature exceeding 70°C, heat resistant cables and cable glands suitable for at
least 90°C shall be used.
If the transmitter is physically connected to a possible source of heating or cooling, e.g. by
mounting to a process pipe or a temperature sensor, the temperature at the point of connection
shall be within the ambient temperature range as given in the certificate.
Cable entries and blanking elements shall be used that are suitable for the application and correctly
installed.
The enclosure must be connected to the potential matching line
Applied screw terminal torque is max 0.4 Nm on all terminals.
Protection degree of IP 54 according to EN 60529 is achieved if certified cable glands or conduit
entry devices are used that are suitable for the application and correctly installed.
Protection degree of IP 68 according to EN 60529 is only achieved if certified cable glands or
conduit entry devices are used that are suitable for the application and correctly installed with
sealing washers or Loctite sealant added to the threads of the sensor, blanking elements and cable
glands.
For group III (dust), electrostatic charging of the paint layer shall be avoided
7501QI01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-09-16
Version Revision
V2R0
Page:
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Ex d, tb installation
Unused cable entries must be sealed by the blanking elements supplied with the 7501 or other Ex d and/or
Ex tb certified blanking elements suitable for the application.
Only Ex d and/or Ex tb certified cable and cable glands shall be used that are suitable for the application and
correctly installed.
Protection degree of IP 54 according to IEC 60529 is achieved if Ex d certified cable glands or conduit entry
devices are used that are suitable for the application and correctly installed.
Protection degree of IP 68 according to IEC 60529 is only achieved if Ex d certified cable glands or conduit
entry devices are used that are suitable for the application and correctly installed with sealing washers or
Loctite sealant added to the threads of the sensor, blanking elements and cable glands.
The display cover must be screwed all the way in and the safety catch must be fastened before putting into
service. Do not open display cover until 30 minutes after disconnecting power to the equipment allowing
internal capacitors to discharge, or do not open display cover unless area is known to be safe
For an ambient temperature exceeding 70 °C, heat resistant cables and cable glands suitable for at least
90°C shall be used.
If the transmitter is physically connected to a possible source of heating or cooling, e.g. by mounting to a
process pipe or a temperature sensor, the temperature at the point of connection shall be within the ambient
temperature range as given in the certificate. The sensor shall be suitable for use as entry device on an Ex d
enclosure and shall not add volume to the 7501 enclosure. The thread of the sensor must be in compliance
with EN60079-1 / EN60079-31.
The enclosure must be connected to the potential matching line.
When the process temperature range exceeds the service temperature range it shall be verified by on-site
temperature measurements, taking the worst case conditions into account, that the service temperature does
not exceed the range of the module.
For group III (dust), electrostatic charging of the paint layer shall be avoided
No modification to the enclosure is allowed by the customer except as mentioned in the manual or
installation drawing.
7501QF01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-07-28
Version Revision
V1R0
Page:
2/5
The entity concept
The Transmitter must be installed according to National Electrical Code (ANSI-NFPA 70) and shall be
installed with the enclosure, mounting, and spacing segregation requirement of the ultimate application.
Equipment that is FM-approved for intrinsic safety may be connected to barriers based on the ENTITY
CONCEPT. This concept permits interconnection of approved transmitters, meters and other devices in
combinations which have not been specifically examined by FM, provided that the agency's criteria are
met. The combination is then intrinsically safe, if the entity concept is acceptable to the authority having
jurisdiction over the installation.
The entity concept criteria are as follows:
The intrinsically safe devices, other than barriers, must not be a source of power.
The maximum voltage Ui(V
MAX
) and current Ii(I
MAX
), and maximum power Pi(Pmax), which the device can
receive and remain intrinsically safe, must be equal to or greater than the voltage (Uo or V
OC
or V
t
) and
current (Io or I
SC
or I
t
) and the power Po which can be delivered by the barrier.
The sum of the maximum unprotected capacitance (C
i
) for each intrinsically device and the interconnect-
ing wiring must be less than the capacitance (C
a
) which can be safely connected to the barrier.
The sum of the maximum unprotected inductance (L
i
) for each intrinsically device and the interconnecting
wiring must be less than the inductance (L
a
) which can be safely connected to the barrier.
The entity parameters Uo,V
OC
or V
t
and Io,I
SC
or I
t
, and C
a
and L
a
for barriers are provided by the barrier
manufacturer.
For Class II and Class III installations where rigid conduit is not used, seal cable entries against dust and
fibres using a NRTL listed cable gland fitting.
7501QF01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-07-28
Version Revision
V1R0
Page:
1/5
FM Installation drawing 7501
For safe installation of 7501 the following must be observed. The module shall only be installed by
qualified personnel who are familiar with the national and international laws, directives and
standards that apply to this area.
Intrinsic safe installation:
Hazardous classified Location
Class I,II,II Division1 Groups, ABCDEFG
Class I, Zone 0, IIC, Zone 20
T4: -40 ≤ Ta ≤ 85ºC
T5: -40 ≤ Ta ≤ 60ºC
T6: -40 ≤ Ta ≤ 40ºC
Zone 20 Temperature Class:
-40 ≤ Ta ≤ 85ºC T100 ºC
-40 ≤ Ta ≤ 60ºC T75 ºC
-40 ≤ Ta ≤ 40ºC T60 ºC
Non classified Location
Terminal: 3,4,5,6
Uo: 9.6 VDC
Io: 28 mA
Po: 67 mW
Lo: 35 mH
Co: 3.5 μF
Terminal: 1,2
Ui: 30 VDC
Ii: 120 mA
Pi: 0.84 W
Li: 0 μH
Ci: 2 nF
UM < 250V
Voc or Uo < Vmax or Ui
Isc or Io < Imax or Ii
Po < Pi
Ca or Co > Ci + Ccable
La or Lo > Li + Lcable
The barrier must not
be connected to any
associated apparatus
which uses or
generates more than
250 VRMS
1
2
6
5
4
3
+
-
Barrier
7501
7501QF01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2015-07-28
Version Revision
V1R0
Page:
3/5
Non Incendive installation:
Hazardous classified Location
Class I,II,III ,Division 2, Groups, ABCDFG
Class I, Zone 2, IIC
Non classified Location
Terminal: 1,2
Vmax: 35 VDC
1
2
6
5
4
3
+
-
7501
Vmax
35V
T4: -40 ≤ Ta ≤ 85ºC
T6: -40 ≤ Ta ≤ 60ºC
Terminal: 3,4,5,6
Sensor: RTD or TC
O-ring Sealings
Silicone rubber:-40°C ≤Ta ≤ +85°C
FKM rubber: -20°C ≤Ta ≤ +85°C
Protection: Indoor and Outdoor TYPE 4X or IP66
