Catalogs >
NORIS Group GmbH >
Datasheet RFJ5

Datasheet RFJ5
2Pages

Catalog excerpts

Limit Value Switch for Frequency Input Sinusoidal Signal Straightforward application Suitable for severe operating conditions 1 Schaltb Switch.Raereich: nge: Anti-tamper seal for drum scale Frequency ranges to suit customer requirements Provision made for fine adjustment of measuring range Meets high EMC-requirements Limit value freely adjustable by drum scale 3 4 Limit Value Switch RFJ5.../RFS5.../RFG5... Compact construction Volt-free output as normally closed contact or normally open contact Open-circuit or closed-circuit variants available Open-circuit devices with integrated push button to simulate an increased sensor signal for test functions without critical machine loading Optionally with latching function (only open circuit devices) Operating characteristics displayed by integrated LEDs Flame-inhibiting and self-extinguishing body Suitable tachogenerators are available (NORIS devices GE...) Limit Value Switch RFJ5.../RFS5.../RFG5... Method of Operation Limit value switches of the series 5 are designed to monitor and process electric measured variables. Working principle: When the actual value of the measuring signal supplied reaches the setpoint, the built-in relay will operate. The switching status of the relay contact may, for instance, be monitored or individually processed by a machine controller. Details Designed to monitor a sinusoidal frequency signal Suitable to evaluate outputs of speed pickups; AC-tachogenerators with various signal amplitudes Suitable to evaluate outputs of NORIS tachogenerators, GE...-series via RFG5... Factory-set maximum range frequency adjustment between 50 Hz and 10 kHz (maximum range frequency is 100 % of drum scale) Trimming potentiometer for re-adjustment of measuring range Limit value setpoint adjustable by means of drum scale from 5 ... 100 % Lowest limit value: 50 Hz (RFx500...), 100 Hz (RFx501...), 1,000 Hz (RFx502...) To avoid triggering errors the frequency full range set in factory must be the highest frequency of the measuring chaine, the set point will be done in a ratio to the full range. Integrated Test Button for Test Purposes Open-circuit devices have a test button integrated for testing purposes. As long as this button is kept pressed, the preselected limit value is decreased by approx. 15 %. This enables safety functions, such as an overspeed trip to be tested without it being necessary to run the machine in the critical range. Volt-free Relay Contact, Closed-circuit or Open-circuit Version A volt-free relay contact is provided as a normally closed or normally open contact for outputting and further processing. In addition, there is a choice between closed-circuit and open-circuit devices. In the case of closed-circuit devices, the output relay is pulled up in the DB-RFx5_en normal state of operation with the operating voltage applied. It drops off upon the limit-value being exceeded or if the operating voltage fails. In the open-circuit variant, the output relay pulls up when the limit-value is exceeded with the operating voltage applied. Failure of the voltage will not result in any switching function below the limit value. Latching function for open circuit devices Open circuit devices can optionally be equipped with a latching function (see type code). When the limit value is exceeded, the relay keeps activated even if the signal falls below the limit value afterwards. The device has to be reset by disconnecting the operating voltage. Ui (mV) 400 300 200 100 5

Open the catalog to page 1

Dimensions, Connection, Diagram Series RFJ5.../RFS5.../RFG5... Relais position Device and series (Standard variants, other available on customer request) Limit value switch 4 Input range fB/upper-range frequency fE/limit value fs x = contact closed - = contact open (*) = Latching function: as -A1, but relay keeps open until Us is disconnected (**) = Latching function: as -A2, but relay keeps closed until Us is disconnected The red LED is illuminated, if the limit value is exceeded Standard Variants 5 Variant Frequency version x is to be replaced with range J, S or G of input signal Please...

Open the catalog to page 2