Product Model
RM4UA31MW
Selling Points
- 1±5% switching threshold drift and ±10% time delay accuracy ensure reliable measurements.
- 2Measures 0.05–5 V AC/DC and 24–240 V AC/DC, covering a wide range of industrial needs.
- 3Hysteresis adjustable from 5–30% of the voltage threshold setting for customizable response times.
- 4Dimensions are 0.37 inches (0.168 mm) wide, making it suitable for space-constrained applications.
- 5Designed for continuous operation in harsh industrial environments with a maximum switching voltage of 440 V AC.
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 | Adjustable 0.05...30 s |
Maximum switching voltage | 440 V AC | operating voltage tolerance | 0.85...1.1 Uc |
Power consumption in VA | 1.5…3.3 VA AC | Maximum power consumption in W | 1.2 W DC |
Output contacts | 2 C/O | Hysteresis | 5…30 % adjustable voltage threshold setting |
Internal input resistance | 71000 Ohm<br />43000 Ohm<br />6600 Ohm | Permissible continuous overload | 80 V<br />20 V<br />60 V |
Permissible non repetitive overload | 100 A <= 1 s<br />25 A <= 1 s<br />80 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 | Time delay drift | <= 0.07 % per degree centigrade depending on the rated operational temperature<br /><= 0.5 % within the supply voltage range (0.85...1.1 Un) |
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 | Width | 0.9 in (22.5 mm) |
Net Weight | 0.18 lb(US) (0.08 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