1.5 Technical data
General specifications
Input characteristics
Output characteristics
Manufacturer: Endress+Hauser GmbH+Co.
Designation: Prolevel FMC 661
Function: Transmitter for level measurement with capacitance and hydrostatic
probes as well as level limit detection with capacitance and vibration
probes
Input signal: Level proportional PFM signal
Interfaces: 0/4…20 mA, Rackbus RS 485 (option)
Reference conditions: to IEC 770 (T
U
= 25°C) or as specified
Miscellaneous: CE mark
Signal input, channel 1
Signal: Pulse frequency modulated signal from connected probe or sensor
Explosion protection: PTB [EEx ia] IIC, FM, CSA, intrinsically safe signal circuits separated
from each other and rest of the electronics
Probe or sensor: Multicap or other capacitance probe with EC 37 Z or EC 47 Z
electronic insert
Deltapilot S hydrostatic sensor with FEB 17/FEB 17 P
Switch input, channel 2
Signal : Pulse frequency modulated signal from connected probe or sensor
Limit switch: Multicap probe with EC 16 Z or EC 17 Z electronic insert
other capacitance probe with EC 17 Z electronic insert
Liquiphant FDL 30 / FDL 31 / FDL 35 / FDL 36
Soliphant DM 90 Z / DM 91 Z / DM 92 Z
Analog output
Output: 0... 20 mA, switchable to 4... 20 mA
Signal underflow: -2 mA;
Signal overflow: + 22 ± 0.2 mA
Output on alarm: selectable +110%, -10% or hold
Current limitation: 23 mA
Temperature
coefficient:
0.3%/10 K of range end value
RFI (E = 10 V/m) 1 %
Warm-up time: 1 s
Output damping: 0 to 100 s, selectable
Max. load: 600 Ω
Load effect: negligible
Relays
Type: 5 relays with potential-free changeover contacts
Function: 2 pairs of two limit relays with freely selectable switch points and
hysteresis for operation in min. or max. fail-safe mode
1 alarm relay (de-energises on fault condition)
Switching capacity: 6 A, 250 VAC ; 750 VA at cos ϕ = 0.7, 1500 VA at cos ϕ = 1
6 A, 250 VDC; 200 W
Chapter 1: Introduction Prolevel FMC 661
10 Endress+Hauser
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