XA03020K/09/EN/01.22-00
71588962
2022-09-26

ProductsSolutions

Safety Instructions
RN22, RN42
[Ex ia Ga] IIC[Ex ia Da] IIIC
Ex ec IIC Gc

Services

RN22, RN42

XA03020K

RN22, RN42
Table of contents
Associated documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Supplementary documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Manufacturer´s certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Manufacturer address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety instructions: Intrinsic safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Safety instructions: Installation in Zone 2 (EPL Gc) . . . . . . . . . . . . . . . . . . 6
Safety instructions: Specific conditions of use . . . . . . . . . . . . . . . . . . . . . . . 6

Endress+Hauser

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XA03020K

Associateddocumentation

RN22, RN42

This document is an integral part of the following OperatingInstructions:• Operating instructions: BA02004K• Brief operating instructions: KA01449K• Technical information: TI01515K

Supplementary
documentation

Explosion protection brochure: CP00021Z

Manufacturer´scertificates

NEPSI certificate

The Explosion-protection brochure is available:• In the download area of the Endress+Hauser website:www.endress.com -> Downloads -> Brochures and Catalogs ->Text Search: CP00021Z• On the CD for devices with CD-based documentation

Certificate number: GYJ22.1942U, GYJ22.1806X
Affixing the certificate number certifies conformity with the following
standards (depending on the device version)• GB/T 3836.1-2021• GB/T 3836.3-2021• GB/T 3836.4-2021
CCC certificate
Certificate number: 2023322316005023
Please refer to NEPSI/CCC certificates for conditions of safe use.

Manufacturer
address

4Endress+Hauser Wetzer GmbH + Co. KG
Obere Wank 187484 Nesselwang, Germany

Endress+Hauser

RN22, RN42

XA03020K

Safetyinstructions:Intrinsic safety

Hazardous area
Zone 0, 1, 2
EPL Ga, Gb, Gc
Zone 20, 21, 22
EPL Da, Db, Dc

Hazardous area
Zone 2EPL GcNon-hazardous area

certified enclosure
with min. IP54

e.g. RN22
e.g. Process transmitterenclosurewith at least IP20

e.g. RN22
Zone 0, 1, 2
EPL Ga, Gb, Gc
Zone 20, 21, 22
EPL Da, Db, Dc

e.g. Process transmitter

Local potential equalisation
A0046146• Comply with the installation and safety instructions in the OperatingInstructions.
• Install the device according to the manufacturer's instructions andany other valid standards and regulations (e.g. EN/IEC 60079-14).
• The unit is an associated electrical apparatus and can only be
installed outside the hazardous area.
• The unit must be installed in such way that a minimum ingress
protection of IP 20 is achieved.
• When installing the unit care must be taken that there must be a
spacing of at least 50 mm(zone radius) to the intrinsically safe
terminals• Screw tight the unused terminals for keeping the required distances
between intrinsically safe circuits/terminals.

Endress+Hauser

5

XA03020K

RN22, RN42

Safetyinstructions:
Installation inZone 2 (EPL Gc)

These instructions concern the required enclosure, accessories andsupply cables in final application.

Safetyinstructions:
Specific
conditions of use• If several devices are installed side by side, it is important to ensurethat the maximum side wall temperature of the individual device of80 °C (176 °F) is not exceeded. If this cannot be guaranteed, mountthe devices at a distance from one another or ensure sufficientcooling.
• When install the unit in EPL Gc a certified enclosure shall be usedproviding a degree of protection of at least IP54 and compliance withthe enclosure requirements to IEC/EN 60079-0.
• In an explosive atmosphere, do not open the certified enclosure whenvoltage is supplied (ensure that at least IP 54 is maintained during
operation).
• For full certification as an electrical equipment for use in EPL Gc thetests according to IEC 60079-0:2017 section 5.2 and 5.3 have to be
carried out. Based on the test results a temperature class shall beassigned.

• Comply with the installation and safety instructions in the OperatingInstructions.
• Install the component according to the manufacturer's instructions
and any other valid standards and regulations (e.g. IEC/EN60079-14).
• Seal the cable entries tight with certified cable glands which have atleast type of protection Ex ec suitable for Group IIC (degree ofprotection IP54).

Type of protection[Ex ia Ga] IIC[Ex ia Da] IIIC
Ex ec IIC Gc

Ambient temperature: –40 to +60 °C
TypeElectrical data

RN22,RN42Supply RN22:
terminals 1.1 (+), 1.2 (-)
Supply RN42:
terminals 1.1 (L/+), 1.2 (N/-)

6

U = 24V DC (-20%/+25%)
Um = 250 V
U = 24 to 230 V AC/DC (-20 %/+10 %) 50/60Hz
Um = 250 V

Endress+Hauser

RN22, RN42

Type

XA03020K

Electrical data
Output circuit:terminal 3.1 (+), 3.2 (-)
terminal 2.1 (+), 2.2 (-)

U = 30V DC
I = 0/4 - 20 mA
Um = 30 V

Input circuit:
Connection 2-wire (active)
RN22:
terminal 4.1 (+), 4.2 (-)
terminal 6.1 (+), 6.2 (-)
RN42:terminal 4.1 (+), 4.2 (-)
Maximum connection
valuesSingle values:

Combined values Lo/Co:

Uo ≤ 27.3V DC
Io ≤ 87. 6 mA
Po = 597 mW
Ci = negligibly small
Li = negligibly small

Ex ia IIC
Ex ia IIB
Ex ia IIA

Lo = 5.2 mH
Lo = 20.8 mH
Lo = 44.8 mH

Ex ia IIC

1.3 mH/0.05 μF; 1 mH/0.052 μF;
0.5 mH/0.065 μF

Ex ia IIB

26 mH/0.39 μF; 2 mH/0.44 μF; 1 mH/0.53 μF;
0.5 mH/0.64 μF; 0.2 mH/0.683 μF

Ex ia IIA

49 mH/1.3 μF; 20 mH/1.6 μF; 1 mH/1.8 μF;
0.5 mH/2.2 μF; 0.2 mH/2.28 μF

Connection 4-wire (passive)
RN22:
terminal 4.2 (+), 5.1 (-)
terminal 6.2 (+), 5.2 (-)
RN42:terminal 4.2 (+), 4.3 (-)
Maximum connection
valuesCombined values Lo/Co:

Uo ≤ 27.3V DC
Io ≤ 10 mA
Po = 68 mW
Ci = negligibly small
Li = negligibly small

Ex ia IIC

100 mH/0.065 μF; 2 mH/0.072 μF;
1 mH/0.081 μF; 0.5 mH/0.088 μF

Ex ia IIB

100 mH/0.48 μF; 2 mH/0.52 μF;
1 mH/0.59 μF; 0.5 mH/0.683 μF

Ex ia IIA

100 mH/1.7 μF; 1 mH/1.9 μF; 0.5 mH/2.28 μF

Connection 4-wire (passive)
RN22:
terminal 4.2 (+), 5.1 (-)
terminal 6.2 (+), 5.2 (-)
RN42:terminal 4.2 (+), 4.3 (-)

Endress+Hauser

Co = 88 nF
Co = 683 nF
Co = 2280 nF

Ui ≤ 30 V DC
Io not applicable when keeping Ui
Po not applicable when keeping Ui
Ci = negligibly small
Li = negligibly small

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71588962

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