Standstill monitor
LH 5946
Article number:
0059266
Type:
LH5946.48/61 20-400mV UH DC24V
Description
The safe sensorless LH 5946 standstill monitor is suitable for detects the standstill of 3-phase and 1-phase electric motors independent of the direction of rotation. This means sensors such as encoders or proximity switches are not required. The standstill monitor measures the induced voltage of the coasting motor. If the induced voltage approaches 0, this means motor standstill for the device and the output relay is activated.
Technical specifications
| 1- / 2-channel: | 2 |
|---|---|
| Approvals: | UL |
| Cat. / PL acc. to EN ISO 13849-1: | 4/e |
| Classification: | Sensorless |
| Connection: | Pluggable cage clamp terminals, Pluggable screw terminals, Screw terminals |
| Forcibly guided output contacts max.: | 1 NC contact, 3 NO contacts |
| Indicator contacts: | 1 NO contact, 2 Semiconductor monitoring outputs |
| Measuring motor voltage max.: | 690 V |
| Nominal voltage: | AC, DC |
| SIL CL acc. to IEC/EN 62061: | 3 |
| SIL acc. to IEC/EN 62061: | 3 |
| Thermal current Ith max.: | 5 A |
| Thermal current Ith max.: | 5 |
| Type: | LH 5946 |
| Width: | 45 mm |
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Advantages / Customer benefits
- Without sensor and safe
- Fast reaction time
- Easy to retrofit
- Combined with Interlock SAFEMASTER STS
Features
- According to
- Up to PL e and Kategorie 4 according to EN ISO 13849-1
- Up to SIL 3 according to EN 61508 and EN 61800-5-2 - Can be used in safety applications as follows:
- Up to maximum SIL 3 according to EN IEC 62061
- Up to SIL 3 according to EN 61511 - Safe standstill detection on 3- and single-phase motors
- No external sensors necessary
- Independent of direction
- Broken wire detection
- Forcibly guided safety contacts: 3 NO contacts, 1 NC contact for AC 250 V
- 2 semiconductor monitoring outputs
- 1 monitoring output (NO contact)
- Adjustable voltage setting
- Adjustable standstill time delay
- LED indicators for standstill, event of line breakage and operation voltage
- Suitable for operation with inverters
- Width 45 mm