User's Manual

DRAFT
Micropilot FMR53, FMR54
12 V. 1, Rev. 7, 26-10-2012 Endress+Hauser
Output
Output signal HART
Signal coding FSK ±0.5 mA over current signal
Data transmission rate 1 200 Bit/s
Galvanic isolation Yes
PROFIBUS PA (in preparation)
Signal coding Manchester Bus Powered (MBP)
Data transmission rate 31.25 kBit/s, voltage mode
Galvanic isolation Yes
FOUNDATION Fieldbus (in preparation)
Signal coding Manchester Bus Powered (MBP)
Data transmission rate 31.25 kBit/s, voltage mode
Galvanic isolation Yes
Switch output
For HART devices, the switch output is available as an option. See product structure, feature 20:
"Power Supply, Output", option B: "2-wire; 4-20mA HART, switch output"
Devices with PROFIBUS PA and FOUNDATION Fieldbus always have a switch output.
Switch output
Function Open collector switching output
Switching behavior Binary (conductive or non-conductive), switches when the programmable switch point is
reached
Failure mode non-conductive
Eectrical connection values U = 10.4 to 35 V
DC
, I = 0 to 40 mA
Internal resistance
R
I
< 880 W
The voltage drop at this internal resistance has to be taken into account on planning the
configuration. For example, the resulting voltage at a connected relay must be sufficient
to switch the relay.
Insulation voltage floating, Insulation voltage 1 350 V
DC
to power supply aund 500 V
AC
to ground
Switch point freely programmable, separately for switch-on and switch-off point
Switching delay freely programmable from 0 to 100 sec. , separately for switch-on and switch-off point
Number of switching cycles corresponds to the measuring cycle
Signal source
device variables
• Level linearized
• Distance
• Terminal voltage
• Electronic temperature
• Relative echo amplitude
• Diagnostic values, Advanced diagnostics
Number of switching cycles unlimited