6
The design of the unit corresponds to the protection class II except for the terminal
blocks� Protection against accidental contact (finger protection to IP 20) for
qualified personnel is only guaranteed if the terminal screw has been completely
screwed in�
2.5 Location
For the correct operation the unit must be mounted in a housing (protection rating
IP 40 or higher) which can only be opened using a tool or in a locked control
cabinet�
The device has been tested for an impact energy of 1 joule according to EN61010�
2.6 Housing temperature
As described in the technical specifications below the device can be operated in
a wide ambient temperature range� Because of the additional internal heating the
operating elements and the housing walls can have high perceptible temperatures
when touched in hot environments�
2.7 Tampering with the device
In case of malfunction of the unit or queries please contact the manufacturer�
Any tampering with the device can seriously affect the safety of operators and
machinery� This is not permitted and leads to the exclusion of any liability and
warranty claims�
3 Functions and features
The monitor FR-2/FR-2N is a double pulse evaluation system� It monitors rotating,
linear, vibrating or oscillating movements independently of each other�
It receives the pulses from 2 external sensors on 2 separate input channels,
measures the pulse interval and calculates the input frequency� These values are
compared with the set switch points; the outputs are switched in accordance with
the set parameters�
