| Brand | DOLD |
|---|---|
| Housing width | 45 mm |
| Cat. / PL (EN ISO 13849-1) | 4/e |
| SIL (IEC/EN 62061) | 3 |
| Supply voltage type | DC |
| Approvals | UL |
| Connection | Pluggable cage clamp terminals, Pluggable cage clamp terminals 2-wire, Pluggable screw terminals |
| Order number | 0066820 |
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DOLD UH 6937 – Speed and frequency monitor
- Brand
- DOLD
- Part number
- UH 6937
- Order number
- 0066820
Speed and frequency monitor
- For safety applications up to PL e / Cat. 4 and SIL 3
- Simple and time saving setup without PC
- Comfortable, menu guided configuration via frontside display
- Reducing interruption time in production by extensive diagnostic functions
- Easy to integrate in existing drive applications
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The frequency monitor UH 6937 serves the reliable frequency monitoring of alternating currents and the safe monitoring of the phase sequence resp. rotary direction of motors with 3-phase alternating currents. It is used to monitor the output frequency of inverters or the rotor frequency of slipring motors. An other application area is the monitoring of motors in crane plants. Using the front side display the parameters can be easily and comfortably adapted to the individual application or changed when necessary. With the UH 6937 it is also possible to only monitor the frequency applied or only the rotary direction.
Features
- CorrespondsFor frequency monitoring:- PL e and category 4 according to EN ISO 13849-1- SIL 3 according to EN 61508For monitoring the phase sequence or direction of rotation:- PL d and category 2 according to EN ISO 13849-1- SIL 2 according to EN 61508
- Can be used in safety applications of frequency monitoring as follows:- Up to maximum SIL 3 according to EN IEC 62061- Up to SIL 3 according to EN 61511Can be used in safety applications of phase sequence or direction of rotation monitoring as follows:- Up to maximum SIL 2 according to EN IEC 62061- Up to SIL 2 according to EN 61511
- Over-, underfrequency or window monitoring of single or 3-phase in AC systems
- Monitoring the direction of rotation with 3-phase AC voltage
- Integrated user friendly frontside display- Comfortable, menu guided configuration- For set point and actual value display of frequency and direction of rotation
- Fast reaction time by measuring duration of cycle of input frequency
- Universal measuring inputs for AC-voltages of 8 … 280 V for single-phase monitoring as well as 16 … 690 V for single- and 3-phase monitoring
- Suitable for inverters- Variant /0_ _ : Maximum input frequency 700 Hz- Variant /1_ _ : Maximum input frequency 1200 Hz
- Adjustable hysteresis
- Adjustable reset delay function from 0 … 100 s for frequency monitoring
- Adjustable start up time delay from 0 … 100 s for frequency motoring or tolerance when switching on from 0 … 60000 periods for monitoring the direction of rotation
- Adjustable alarm delay from 0 … 100 s for frequency motoring or tolerance when switching on from 5 … 60000 periods for monitoring the direction of rotation
- Manual or auto-reset
- Galvanic separation between measuring input, auxiliary voltage and output contacts
- 2-channel function
- Forcibly guided output contacts
- LED-indicators and 2 semiconductor monitoring output
- Width 45 mm
- With pluggable terminal blocks for easy exchange of devices
- Variant /_ _1:- It is possible to set a variety of response parameters by means of a 4 bit selection facility from an overriding control unit;- Analog output (2V to 10V) corresponding to the current speed;- Possibility to override frequency and direction of rotation monitoring (muting);- Adjustable changeover bridging from 0 … 100 s for frequency motoring or tolerance when switching on from 0 … 60000 periods for monitoring the direction of rotation
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 cage clamp terminals 2-wire, Pluggable screw terminals |
| Forcibly guided output contacts max. | 2 NO contacts |
| Indicator contacts | 2 Semiconductor monitoring outputs |
| Measuring motor voltage max. | 690 V |
| Nominal voltage | DC |
| SIL CL acc. to IEC/EN 62061 | 3 |
| SIL acc. to IEC/EN 62061 | 3 |
| Thermal current Ith max. | 8 A |
| Width | 45 mm |
| Type | UH 6937 |
Available variants
| Auxiliary voltage | DC 24 V |
|---|---|
| Contact equipping | 2 NO contacts |
| Terminal type | pluggable terminal blocks with cage clamp terminals · pluggable terminal blocks with screw terminals |
| Approvals and Markings | UL-listed C/US, TÜV, UKCA, CCC |
| Variant | Max. response value 600 Hz · Max. response value 600 Hz. With different frequency mode and analogue output · Max. response value 1000 Hz · Max. response value 1000 Hz. With different frequency mode and analogue output |
Tell us the variant you need in your quote request.
