Endress+Hauser Micropilot FMR62 - Description of Use as a Safety Instrumented System; Mounting Requirements

Micropilot FMR62 Appendix
Endress+Hauser 29
1 4 5 7
9
6 8
2
3
A0028746
1 PLC (programmable logic controller)
2 Transmitter power supply unit RN221N (with communication resistor)
3 Connection for Commubox FXA191, FXA195 and Field Communicator 375, 475
4 Field Communicator 475
5 Computer with operating tool (e.g. FieldCare, AMS Device Manager, SIMATIC PDM)
6 Commubox FXA191 (RS232) or FXA195 (USB)
7 Field Xpert SFX350/SFX370
8 VIATOR Bluetooth modem with connecting cable
9 Transmitter
An analog signal (4 to 20 mA) that is in proportion to the level is generated in the
transmitter. This is sent to a downstream logic unit (e.g. PLC, limit signal transmitter, etc.)
where it is monitored to determine whether it is below or above a specified limit value.
For fault monitoring, the logic unit must be able to detect both HI alarms (≥ 21.0 mA) and
LO alarms (≤ 3.6 mA).
8.1.2 Description of use as a safety instrumented system
The device is a "downward-looking" measuring system that functions according to the
time-of-flight (ToF) method. The distance from the reference point (process connection of
the device) to the product surface is measured. High-frequency pulses are emitted via an
antenna. The pulses are reflected by the product surface, received by the electronic
evaluation unit and converted into level information. This method is also known as level-
radar.
8.1.3 Mounting requirements
The installation conditions for various measurements are described in the Technical
Information for the device.
Correct installation is a prerequisite for safe operation of the device.