product brand nameSIRIUS
product categorySIRIUS 3RN2 thermistor motor protection
product designationThermistor motor protection relay
design of the productStandard evaluation unit with ATEX approval, open-circuit ve short-circuit detection in the sensor circuit, safe disconnection, non-volatile
product type designation3RN2
General technical data
product functionthermistor motor protection
display version LEDVar
at AC in hot operating state1,7 W
at DC in hot operating state1,7 W
insulation voltage for overvoltage category III according to IEC 60664 with degree of pollution 3 rated value300 V
degree of pollution3
surge voltage resistance rated value6 kV
between auxiliary and auxiliary circuit300 V
between control and auxiliary circuit300 V
shock resistance according to IEC 60068-2-2711 g / 15 ms
vibration resistance according to IEC 60068-2-610... 55 Hz: 0,35 mm
mechanical service life (operating cycles) typical10.000.000
at 24 V typical100.000
at 230 V typical100.000
thermal current of the switching element with contacts maximum5 A
reference code according to IEC 81346-2K
Substance Prohibitance (day/month/year)07/01/2006
SVHC substance nameLead CAS-Yok. 7439-92-1 Lead monoxide (lead oxide) CAS-Yok. 1317-36-8 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one CAS-Yok. 71868-10-5 Melamine CAS-Yok. 108-78-1 6,6'-di-tert-butyl-2,2'-methylenedi-p-cresol CAS-Yok. 119-47-1
Net Weight0,145 kg
Product Function
error memoryVar
dynamic open-circuit detectionVar
external resetVar
auto-RESETVar
manual RESETVar
Control circuit/ Control
type of voltage of the control supply voltageAC/DC
at 50 Hz rated value24... 240 V
at 60 Hz rated value24... 240 V
control supply voltage at DC rated value24... 240 V
initial value0,85
full-scale value1,1
initial value0,85
full-scale value1,1
initial value0,85
full-scale value1,1
at 24 V0,7 A
at 240 V12 A
at 24 V0,25 ms
at 240 V0,2 ms
Measuring circuit
buffering time in the event of power failure minimum40 ms
Precision
relative metering precision2 %
Auxiliary circuit
material of switching contactsAgSnO2 hard gold-plated
number of NC contacts for auxiliary contacts0
number of NO contacts for auxiliary contacts0
number of CO contacts for auxiliary contacts2
operational current of auxiliary contacts at AC-15 maximum3 A
at 24 V1 A
at 125 V0,2 A
at 250 V0,1 A
Main circuit
operating frequency rated value50... 60 Hz
ampacity of the output relay at AC-15 at 250 V at 50/60 Hz3 A
at 24 V1 A
at 125 V0,2 A
continuous current of the DIAZED fuse link of the output relay6 A
Electromagnetic compatibility
due to burst according to IEC 61000-4-42 kV (power ports) / 1 kV (signal ports)
due to conductor-earth surge according to IEC 61000-4-52 kV (line to ground)
due to conductor-conductor surge according to IEC 61000-4-51 kV (line to line)
electrostatic discharge according to IEC 61000-4-26 kV contact discharge / 8 kV air discharge
Galvanic isolation
design of the electrical isolationProtective separation
between input and outputVar
between the outputsVar
between the voltage supply and other circuitsVar
Safety related data
failure rate [FIT] at rate of recognizable hazardous failures (λdd)6.8E-8 1/h
failure rate [FIT] at rate of non-recognizable hazardous failures (λdu)3.08E-7 1/h
average diagnostic coverage level (DCavg)18 %
MTBF97 a
MTTFd303 a
IEC 62061
Safety Integrity Level (SIL) according to IEC 62061SIL 1
PFHD with high demand rate according to IEC 620613.76E-7 1/h
ISO 13849
performance level (PL) according to EN ISO 13849-1c
category according to EN ISO 13849-11
performance level (PL) according to ISO 13849-1PL c
IEC 61508
Safety Integrity Level (SIL) according to IEC 615081
safety device type according to IEC 61508-2Type B
PFDavg with low demand rate according to IEC 615080,0041
Safe failure fraction (SFF)74 %
hardware fault tolerance according to IEC 615080
T1 value for proof test interval or service life according to IEC 615083 a
Connections/ Terminals
product component removable terminal for auxiliary and control circuitVar
type of electrical connectionspring-loaded terminal (push-in)
for auxiliary and control circuitspring-loaded terminals (push-in)
solid1x (0,5... 4 mm²)
finely stranded with core end processing1x (0,5... 2,5 mm²)
finely stranded without core end processing0,5... 4 mm²
for AWG cables solid1x (20... 12)
for AWG cables stranded20... 12
solid0,5... 4 mm²
finely stranded with core end processing0,5... 2,5 mm²
finely stranded without core end processing0,5... 4 mm²
solid20... 12
stranded20... 12
Installation/ mounting/ dimensions
mounting positionany
fastening methodscrew ve snap-on mounting onto 35 mm DIN rail
height100 mm
width22,5 mm
depth90 mm
— forwards0 mm
— backwards0 mm
— upwards0 mm
— downwards0 mm
— at the side0 mm
— forwards0 mm
— backwards0 mm
— upwards0 mm
— at the side0 mm
— downwards0 mm
— forwards0 mm
— backwards0 mm
— upwards0 mm
— downwards0 mm
— at the side0 mm
Ambient conditions
installation altitude at height above sea level maximum2.000 m
during operation-25... +60 °C
during storage-40... +85 °C
during transport-40... +85 °C
relative humidity during operation maximum70 %
explosion protection category for dust[Ex t] [Ex p]
explosion protection category for gas[Ex e] [Ex d] [Ex px]