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Operating instructions

(Safety-related part ATEX)

Inductive NAMUR sensors

N7S**A (type I7S…)

N7R**A (type I7R…)

706137 / 00 01 / 2012

Remarks for safe use in hazardous areas

Functions and features

• Use in hazardous areas according to the classification

II 1G

(group II, category 1G, apparatus for gas atmosphere).

II 1G Ex ia IIC T*1) Ga

1)For more details regarding the temperature class see table 1.

• Use in hazardous areas according to the classification

II 1D

(group II, category 1D, apparatus for dust atmosphere).

II 1D Ex ia IIIC T*°C1) Da

1) For more details regarding the surface temperature see table 1.

Table 1

Minimum permissible

operating temperature

of the application in °C

Maximum permissible

operating temperature of the

application in °C

for use in temperature class

T* (1G) /

at maximum surface

temperature *°C (1D)

T6 / 85°C T4 / 125°C

Type designation Article no.

I7S2***-N*** N7S20A

N7S21A -40 60 100

I7R2***-N***

N7R20A

N7R22A

N7R28A

N7R30A

-40 60 100

I7R2***-NL***

N7R21A

N7R23A

N7R29A

N7R31A

-40 70 100

The indications apply to intrinsically safe circuits with the following maximum values:

Ui = 15 V, Ii = 50 mA, Pi = 120 mW.

• The requirements of the standards IEC60079-0: 2011, IEC60079-11: 2011

and

IEC60079-26: 2006 + Corr. 2009 are met.

EC type test certificate

BVS 08 ATEX E026

IECEx type test certificate

IECEx BVS 09.0016

Installation / Set-up

The units must only be installed, connected and set up by qualified staff. The qualified staff

must have knowledge of protection classes, regulations and provisions for apparatus in

hazardous areas.

Check whether the classification (see table 1 above and marking on the unit) is suitable for

the application.

• Connection only to intrinsically safe circuits which are approved with the EC type test

certificate and do not exceed the following maximum values:

Ui = 15 V, Ii = 50 mA, Pi = 120 mW

• Permissible operating temperature of the application (referred to the maximum power

which can be supplied):

see table 1

For further permissible maximum values for intrinsically safe circuits and corresponding

limit values for the operating temperature please refer to the EC type test certificate.

• Maximum effective internal inductance (Li) and capacitance (Ci):

Type designation Article no. Internal inductance Li

in Hμ

Internal capacitance

Ci in nF

I7S2002-N*** N7S20A 120 150

I7S23,5-N*** N7S21A 150 150

I7R2010-N***

I7R2015-N***

N7R20A

N7R28A

N7R22A

N7R30A

100 150

I7R2010-NL*** N7R21A

N7R29A 90 90

I7R2015-NL*** N7R23A

N7R31A 65 90

Installation remarks / Installation

• Adhere to the relevant national regulations and provisions.

• Avoid electrostatic charging on plastic units and cables.

• To avoid electrostatic charging steps must be taken to ensure the equalisation of potential

of metal parts (plug housing, fixing elements, etc.).

Produktspecifikationer

Varumärke:	IFM
Kategori:	Inte kategoriserad
Modell:	N7S20A
Färg på produkten:	Wit
Snäll:	Elektronische keukenweegschaal
Lätt att städa:	Ja
Noggrannhet:	1 g
Maximal viktkapacitet:	5 kg
Material:	Glass, Plastic
Mått (B x D x H):	160 x 200 x 15 mm
Batterier-ingår:	Ja
Taraviktsfunktion:	Ja