Speed and frequency monitor UH 6937

Numero Ordine: 0066820
Type: UH6937.02PS/61 DC24V

The frequency monitor UH 6937 serves the reliable frequency monitoring of alternating currents... altro

Descrizione del prodotto

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.

Specifiche tecniche

Width:	45 mm
Classification:	Sensorless
Cat. / PL acc. to EN ISO 13849-1:	4/e
SIL CL acc. to IEC/EN 62061:	3
Nominal voltage:	DC
Thermal current Ith max.:	8 A
1- / 2-channel:	2
Connection:	Pluggable screw terminals, Pluggable cage clamp terminals, Pluggable cage clamp terminals 2-wire
Indicator contacts:	2 Semiconductor monitoring outputs
Measuring motor voltage max.:	690 V
Approvals:	UL
Forcibly guided output contacts max.:	2 NO contacts
Type:	UH 6937

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Vorteile / Kundennutzen

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
For inverters up to 1200 Hz
Possible languages: English, german, french

Merkmale

Corresponds
For frequency monitoring:
- PL e and category 4 according to EN ISO 13849-1
- SIL 3 according to EN 61508
For 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 61511
Can 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 switchover time from 0 ... 100 s for frequency motoring or tolerance when switching on from 0...60000 periods for monitoring the direction of rotation