Product Model
RM4UA02B
Selling Points
- 1±5% setting accuracy for precise voltage measurement.
- 2Overvoltage and undervoltage detection with adjustable hysteresis.
- 3Measures 1-100 V AC and DC, with adjustable voltage threshold settings.
- 4Designed for 30 million operating cycles, ensuring long-lasting performance.
- 5Meets CE and IEC 60664-1 standards for safety and quality assurance.
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
| Parameter | Value | Parameter | Value |
|---|---|---|---|
Range of Product | Harmony Relay | Relay Type | Voltage measurement relay |
Product or Component Type | Industrial measurement and control relays | Relay name | RM4U |
Relay monitored parameters | Overvoltage or undervoltage detection | time delay | Without |
Contacts type and composition | 1 C/O | Maximum switching voltage | 440 V AC |
operating voltage tolerance | 0.85...1.1 Uc | Power consumption in VA | 2 VA AC |
Output contacts | 1 C/O | Hysteresis | 5…30 % adjustable voltage threshold setting |
Internal input resistance | 23000 Ohm<br />112000 Ohm<br />225000 Ohm | Permissible continuous overload | 150 V<br />90 V<br />300 V |
Permissible non repetitive overload | 100 A <= 1 s<br />200 A <= 1 s<br />400 A <= 1 s | Switching threshold drift | <= 0.06 % per degree centigrade depending permissible ambient air temperature<br /><= 0.5 % within the supply voltage range (0.85...1.1 Un) |
Setting accuracy of time delay | 10 P | Quality labels | CE |
Setting accuracy of the switching threshold | +/-5 % | Operating position | Any position without derating |
Overvoltage category | III IEC 60664-1 | [Ui] rated insulation voltage | 500 V IEC |
Supply disconnection value | > 0.1 Uc | Connections - terminals | Screw terminals, 2 x 1.5 mm²flexible with cable end<br />Screw terminals, 2 x 2.5 mm²flexible without cable end |
[Ie] rated operational current | 2 A 158 °F (70 °C) 24 V DC-13 IEC 60947-5-1/1991<br />2 A 158 °F (70 °C) 24 V DC-13 VDE 0660<br />3 A 158 °F (70 °C) 115 V AC-15 IEC 60947-5-1/1991<br />3 A 158 °F (70 °C) 115 V AC-15 VDE 0660<br />3 A 158 °F (70 °C) 24 V AC-15 IEC 60947-5-1/1991<br />3 A 158 °F (70 °C) 24 V AC-15 VDE 0660<br />3 A 158 °F (70 °C) 250 V AC-15 IEC 60947-5-1/1991<br />3 A 158 °F (70 °C) 250 V AC-15 VDE 0660<br />0.1 A 158 °F (70 °C) 250 V DC-13 IEC 60947-5-1/1991<br />0.1 A 158 °F (70 °C) 250 V DC-13 VDE 0660<br />0.3 A 158 °F (70 °C) 115 V DC-13 IEC 60947-5-1/1991<br />0.3 A 158 °F (70 °C) 115 V DC-13 VDE 0660 | Tightening torque | 5.3…9.7 lbf.in (0.6…1.1 N.m) |
Mechanical durability | 30000000 cycles | [Ith] conventional free air thermal current | 8 A |
Switching capacity in mA | 10 mA 12 V | Contacts material | 90/10 silver nickel contacts |
Number of cables | 2 | Width | 0.9 in (22.5 mm) |
Height | 3.07 in (78 mm) | Depth | 3.1 in (80 mm) |
Terminals description ISO n°1 | (15-16-18)OC<br />(A1-A2)CO<br />(C-B1-B2-B3)CO | Output relay state | Tripped if A measured > A set |
9 mm pitches | 2.5 | Net Weight | 0.370 lb(US) (0.168 kg) |
Electromagnetic compatibility | Electrostatic discharge - test level: 6 kV level 3 (contact discharge) conforming to IEC 61000-4-2<br />Electrostatic discharge - test level: 8 kV level 3 (air discharge) conforming to IEC 61000-4-2 | Ambient air temperature for operation | -4…149 °F (-20…65 °C) |
Vibration resistance | 0.35 ms 10…55 Hz)IEC 60068-2-6 | Shock resistance | 15 gn 11 ms IEC 60068-2-27 |
Standards | EN/IEC 60255-6 | Product Certifications | GL<br />UL<br />CSA |
Ambient Air Temperature for Storage | -40…185 °F (-40…85 °C) | Relative humidity | 15…85 % 3K3 IEC 60721-3-3 |
IP degree of protection | IP20 IEC 60529 terminals)<br />IP50 IEC 60529 casing) | Pollution degree | 3 IEC 60664-1 |
Directives | 73/23/EEC - low voltage directive<br />89/336/EEC - electromagnetic compatibility | Resistance to electrostatic discharge | 6 kV contact IEC 61000-4-2 level 3<br />8 kV air IEC 61000-4-2 level 3 |
Resistance to electromagnetic fields | 9.1 V/m (10 V/m) IEC 61000-4-3 level 3 | Resistance to fast transients | 2 kV IEC 61000-4-4 level 3 |
Protection against electric shocks | 2 kV level 3 IEC 61000-4-5 | Disturbance radiated/conducted | CISPR 22 - class A<br />CISPR 11 group 1 - class A |
Dielectric test voltage | 2.5 kV | Non-dissipating shock wave | 4.8 kV |
Specifications may be subject to change without notice