Main range of productZelio Control product or component typeModular measurement and control relays relay typeFrequency control relays relay nameRM35HZ21FM relay monitored parametersOverfrequency and underfrequency 50 or 60 Hz time delay typeOn crossing the threshold adjustable 0.1...10 s, +/- 10 % switching capacity in VA1250 VA minimum switching current10 mA at 5 V DC power consumption in VA<= 6 VA AC measurement range40...70 Hz frequency utilisation categoryAC-12 conforming to IEC 60947-5-1AC-13 conforming to IEC 60947-5-1AC-14 conforming to IEC 60947-5-1AC-15 conforming to IEC 60947-5-1DC-12 conforming to IEC 60947-5-1DC-13 conforming to IEC 60947-5-1DC-14 conforming to IEC 60947-5-1 Complementary reset time2000 ms for time delay maximum switching voltage250 V AC/DC [Us] rated supply voltage120...277 V AC [Us] rated supply voltage120...277 V AC supply voltage limits102...308 V AC control circuit frequency40...70 Hz width35 mm output contacts1 C/O + 1 C/O contacts materialCadmium free nominal output current5 A input frequency70 Hz measuring cycle<= 200 ms measurement cycle as true rms value run-up delay at power-up0.5 s hysteresis0.3 % fixed measurement accuracy+/- 10 % of the full scale value in time delay+/- 10 % of the full scale value in input repeat accuracy+/- 0.5 % for input and measurement circuit+/- 0.5 % for time delay measurement error+/- 0.05 %/°C with temperature variation< +/- 1 % over the whole range with voltage variation threshold setting-10...2 Hz-2...10 Hz markingCE : 73/23/EECCE : EMC 89/336/EEC overvoltage categoryIII conforming to IEC 60664-1 insulation resistance> 500 MOhm at 500 V DC between supply and relay output conforming to IEC 60255-5> 500 MOhm at 500 V DC between measurement and relay output conforming to IEC 60664-1> 1 MOhm at 500 V DC between supply and measurement conforming to IEC 60255-5> 500 MOhm at 500 V DC between supply and relay output conforming to IEC 60664-1> 500 MOhm at 500 V DC between measurement and relay output conforming to IEC 60255-5> 1 MOhm at 500 V DC between supply and measurement conforming to IEC 60664-1 [Ui] rated insulation voltage400 V conforming to IEC 60664-1 control circuit voltage limits- 15 % + 10 % Un supply frequency50/60 Hz +/- 10 % insulationNo galvanic insulation between supply and measurement operating positionAny position without derating connections - terminalsScrew terminals 1 x 0.5...1 x 4 mm² - AWG 20...AWG 11, solid cable without cable endScrew terminals 2 x 0.5...2 x 2.5 mm² - AWG 20...AWG 14, solid cable without cable endScrew terminals 1 x 0.2...1 x 2.5 mm² - AWG 24...AWG 12, flexible cable with cable endScrew terminals 2 x 0.2...2 x 1.5 mm² - AWG 24...AWG 16, flexible cable with cable end tightening torque0.6...1 N.m conforming to IEC 60947-1 housing materialSelf-extinguishing plastic status LED1 LED green for power ON1 LED yellow for correct frequency (high R1)1 LED yellow for correct frequency (low R2) mounting support35 mm symmetrical DIN rail conforming to EN/IEC 60715 electrical durability100000 cycles mechanical durability30000000 cycles operating rate<= 360 operations/hour under full load Environment immunity to microbreaks10 ms electromagnetic compatibilityEmission standard for industrial environments conforming to EN/IEC 61000-6-4Emission standard for residential, commercial and light-industrial environments conforming to EN/IEC 61000-6-3Immunity for industrial environments conforming to NF EN/IEC 61000-6-2 standardsIEC 60255-6NF EN 60255-6 product certificationsCSAC-TickGLGOSTUL ambient air temperature for storage-40...70 °C ambient air temperature for operation-20...50 °C relative humidity95 % at 55 °C conforming to IEC 60068-2-30 vibration resistance0.35 mm (f = 5...57.6 Hz) conforming to IEC 60068-2-6/IEC 60255-21-11 gn (f = 57.6...150 Hz) conforming to IEC 60068-2-6/IEC 60255-21-1 shock resistance15 gn for 11 ms conforming to IEC 60255-21-1 IP degree of protectionIP20 (terminals) conforming to IEC 60529IP30 (casing) conforming to IEC 60529 pollution degree3 conforming to IEC 60664-1 dielectric test voltage2 kV AC 50 Hz non-dissipating shock wave4 kV Offer Sustainability Sustainable offer statusGreen Premium product RoHS (date code: YYWW) REACh Product environmental profile Product end of life instructions Contractual warranty Warranty period18 months
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Dimensions DrawingsFrequency Control RelayDimensions and Mounting
Connections and SchemaFrequency Control RelayWiring Diagram
Technical DescriptionFunction DiagramsOver-Frequency and Under-Frequency Control on 50 Hz or 60 Hz Supplies
Without memory ("No Memory" mode)
With memory ("Memory" mode)Legend
Tt Time delay after crossing of threshold from 0.1 s to 10 s
Un Supply voltage
F Monitored frequency
F> Over-frequency threshold
F< Under-frequency threshold
11-12, 11-14 R1 output relay connections
21-22, 21-24 R2 output relay connections
Relay status: black color = energized.
NOTE: In "Memory" mode, the relay opens after the time delay and stays in that position when crossing of the threshold is detected. The power supply voltage must be switched off to reset the product.