Endress+Hauser Prolevel FMC 662 User manual

prolevel
FMC 662
Capacitance Level
Measurement
Installation and Operating Instructions
BA 143F/00/en/06.03
016563-1000
valid for Software 1.x
Hauser + Endress
The Power of Know How

Short Instructions
..Quick configuration for level measurement
Function Matrix
Ch 1 Ch 2 Action
1Reset transmitter
Operating mode
V9H5
V8H0
●Enter 672, press »E« to register entry
- Omit if commissioned as in Section 4.1
•●Enter 0 = channels 1+2, 1 = channel 1, 2 = channel 2
Press »E« to register entry
2»Empty« calibration* V0H1 V4H1 ●Fill vessel 0…40% full (probe covered)
Enter level in %, m, ft, etc.
Press »E« to register entry
3»Full« calibration* V0H2 V4H2 ●Fill vessel 60…100% full
Enter level in %, m, ft, etc.
Press »E« to register entry
40/4 mA signal V0H3 V4H3
V0H5 V4H5
V0H6 V4H6
●Enter 0 for 0…20 mA signal, 1 for 4…20 mA signal
Press »E« to register entry
●Enter level for 0/4 mA signal (if not 0)
Press »E« to register entry
●Enter level for 20 mA signal (if not 100)
Press »E« to register entry
5Channel 1
Relays 1a and 1b
Channel 2
Relays 2a and 2b
V1H0 V5H0
V1H1 V5H1
●Enter level for switching in calibration units
Press »E« to register entry
●Enter fail-safe mode: 0 = minimum, 1 = maximum
Press »E« to register
* Can be performed in reverse order
+
+
4 yellow relay LEDs,
1 red alarm LED,
1 green operation LED LC display
Operation
Selects vertical matrix position
Selects horizontal matrix position
Select position V0H0
Selects next digit
Move decimal point
Increases value of digit
Decreases value of digit
Registers entry
Short Instructions Prolevel FMC 662
Endress+Hauser

Table of Contents
Short Instructions . . . . . . . front cover
Notes on Safety . . . . . . . . . . . . . 3
1 Introduction . . . . . . . . . . . . . . 5
1.1 Application . . . . . . . . . . . . . . . 6
1.2 Measuring system . . . . . . . . . . . . 7
1.3 Measuring principle . . . . . . . . . . . . 8
1.4 Functional description . . . . . . . . . . . 9
1.5 Technical data: Prolevel FMC 662 transmitter . 10
2 Installation . . . . . . . . . . . . . . 12
2.1 Probes . . . . . . . . . . . . . . . . 13
2.2 Prolevel FMC 662 installation . . . . . . . 14
2.3 Transmitter wiring . . . . . . . . . . . . 15
2.4 Probe connection . . . . . . . . . . . . 16
2.5 Rackbus RS-485 communications option . . 17
3 Controls . . . . . . . . . . . . . . . 18
3.1 Operating matrix . . . . . . . . . . . . 18
3.2 Keyboard and display . . . . . . . . . . 19
3.3 Commulog VU 260 Z . . . . . . . . . . 20
3.4 Rackbus RS-485 (option) . . . . . . . . . 21
4 Level Measurement . . . . . . . . . . 22
4.1 Commissioning . . . . . . . . . . . . 23
4.2 Calibration . . . . . . . . . . . . . . 24
4.3 Analogue Outputs . . . . . . . . . . . 28
4.4 Relays . . . . . . . . . . . . . . . . 30
4.5 Measured value display . . . . . . . . . 32
4.6 Parameter locking . . . . . . . . . . . 32
5 Other Operating Modes . . . . . . . . 33
5.1 Differential level measurement . . . . . . 34
5.2 Level measurement with reference probe . . 35
6 Trouble-Shooting . . . . . . . . . . . 37
6.1 Fault recognition . . . . . . . . . . . . 37
6.2 Incorrect measurements . . . . . . . . . 39
6.3 Simulated operating mode . . . . . . . . 40
6.4 Exchanging transmitters and sensors . . . . 41
6.5 Repairs . . . . . . . . . . . . . . . . 41
7 Appendix . . . . . . . . . . . . . . . 42
7.1 Calibration and linearisation in volume units . 42
Index . . . . . . . . . . . . . . . . 44
Operating Matrix . . . . . . . . . . . 46
Prolevel FMC 662 Table of Contents
Endress+Hauser 1

Table of Contents Prolevel FMC 662
2Endress+Hauser

Notes on Safety
Approved usageThe Prolevel FMC 662 is a field transmitter for level measurement which can be used
with a variety of capacitance probes. It has been designed to operate safely in
accordance with current technical and safety standards, and must be installed by
qualified personnel according to the instructions in this manual.
The manufacturer accepts no responsibility for any damage arising from incorrect use,
installation or operation of the equipment. Changes or modifications to the equipment
not expressly approved in the operating manual or by the bodies reponsible for
compliance may void the user’s authority to operate the equipment.
CertificatesThe Prolevel FMC 662 transmitter is available with certificate of conformity for use with
probes installed in hazardous areas. The Table below indicates the combinations
available and conditions for installation. Full details can be taken from the certificates.
Please note that where quoted technical data differs from that listed in Section 1.5, that
in the certificate applies.
Certificate Instruments Notes
PTB 99 ATEX 2090 Prolevel FMC 661/662,
FMB 662
II (1) GD,
[EEx ia] IIC,
install outside Ex-area
CSA
LR 53988-81
FMC 662 Class I, II, III
Div. I
Groups A-G
FM
J.I. 0Z2A7.AX
FMC 662 Class I, II, III
Div. I
Groups A-G
PTB 98 ATEX 2215 X DC 12 TE, DC .. TE .,
DC .. E ., DC ..
Capacitance probes
11500 Z(M), 11961 (Z),
21561 (Z)
with electronic insert
EC 16/17/27/37/47 Z,
FEC 12,
HTC 16/17/27 Z, HTC 10 E,
HMC 37/47 Z
II 1/2 G, II 2 G,
EEx ia IIC/IIB T6
PTB 98 ATEX 2215 X DC 12 TE, DC .. TE .,
DC .. E ., DC ..
Capacitance probes
11500 Z(M), 11961 Z,
21561 Z
with electronic insert
EC 17/37/47 Z, FEC 12
II 1 G,
EEx ia IIC/IIB T6
Prolevel FMC 662 Notes on Safety
Endress+Hauser 3

Safety conventions
In order to highlight safety-relevant or alternate operation procedures in the manual the
following conventions have been used, each indicated by a corresponding icon in the
margin.
Note!
•A note highlights actions or procedures which, if not performed correctly, may
indirectly affect operation or may lead to an instrument response which is not
planned.
Caution!
•Caution indicates actions or procedures which, if not performed correctly, may lead
to personal injury or incorrect functioning of the instrument
Warning!
•A warning indicates actions or procedures which, if not performed correctly, will lead
to personal injury, a safety hazard or destruction of the instrument
Note!
Warning!
Caution!
Notes on Safety Prolevel FMC 662
4Endress+Hauser

1 Introduction
The Prolevel FMC 662 is a field transmitter for level measurement with capacitance
probes. It may be installed, commissioned and maintained by authorised personnel only.
The operating manual must have been read and understood before the equipment is
installed: instructions are to be followed exactly.
In this manualSince it is not possible to describe all applications in detail, the standard application,
continuous level measurement on channels 1 and 2, has been used as the basis for the
functional description. Other applications as listed in Section 1.1 are described in
Chapter 5. The operating instructions are structured as follows:
•Chapter 1: Introduction;
contains general information including application, measurement
principle and functional description.
•Chapter 2: Installation;
contains hardware configuration, installation instructions,
connection diagrams and technical data.
•Chapter 3: Controls;
describes operation with the front panel keys, Commulog VU 260 Z,
and via the Rackbus RS 485 interface.
•Chapter 4: Calibration and Operation;
tells you how to commission the Prolevel for the standard
application including calibration, linearisation, analogue outputs,
relays and locking the parameter matrix.
•Chapter 5: Other Operating Modes;
describes differential level measurement and level measurement
with a reference probe
•Chapter 6: Trouble-Shooting;
contains a description of the self-checking system with error
messages, the simulation feature as well as instructions for
configuration on replacement of the transmitter, probe or
electronic insert.
•Chapter 7: Appendix:
contains a flowchart for calibration and linearisation using
volume units.
•Index: lists key words to help you find information quickly.
Short instructionsShort instructions for the standard set-up, continuous level measurement, which is used
in 80% of applications, are to be found in the front cover. We advise you to commission
as described in Section 4.1. before using this procedure as this ensures that probes can
be exchanged without the need for re-calibration.
Further documentationIn addition to this manual, the following publications provide information on configuration
of the Prolevel FMC 662.
•BA 028F Commulog VU 260 Z handheld terminal
•BA 134F Rackbus RS 485
The installation of the probes, electronic inserts and accessories is described in the
documentation accompanying these articles - see text for references. When installing
probes in explosion hazardous areas the instructions included in the accompanying
probe certification must also be observed.
Prolevel FMC 662 Chapter 1: Introduction
Endress+Hauser 5

1.1 Application
The Prolevel FMC 662 is designed for level measurement on one or two channels with a
capacitance probe. The applications described in this manual are as follows:
•Level or volume measurement …Chapter 4
•Differential level measurement …Chapter 5
•Level measurement with a reference probe …Chapter 5.
Prolevel transmitters may also be used for applications in explosion hazardous areas
and possess intrinsically-safe sensor circuits conforming to EEx ia IIC. A list of certificated
combinations is to be found in »Notes on Safety« preceding this chapter.
0/4...20 mA limit relays
Prolevel FMC 662
transmitter
BA143_01
Liquids
Bulk solids
hazardous area safe area
Channel 2
Channel 1
alarm
relay
Fig. 1.1:
Standard application showing
Prolevel FMC 662 controlling
level measurement
➀ in bulk solids
➁ in liquids
channel 2
BA143_02
difference
h2- h1level
channel 1
Fig. 1.2:
Left:
Prolevel FMC 662 used for level
difference measurement with
screen control
Right:
Prolevel FMC 662 used for level
measurement with reference
probe
➀ Measuring probe
➁ Reference probe
channel 2
channel 1
BA143_03
hazardous area safe area
level
Chapter 1: Introduction Prolevel FMC 662
6Endress+Hauser

1.2 Measuring system
A working system for level measurement comprises:
•Prolevel FMC 662 transmitter,
•Capacitance probe for level measurement
•Electronic insert EC 37 Z or EC 47 Z
The Prolevel may operate as a stand alone unit with standard 0/4…20 mA output; two
sets of two relays, freely assignable to channel 1 or 2, can be used to control pumps,
valves, annunciators etc.. Alternatively, the Prolevel may be operated remotely over the
optional Rackbus RS 485 interface, either direct from a personal computer or as part of
a process control system. Connection to Modbus, Profibus or FIP networks can be
realised through the gateways ZA 672, ZA 673 or ZA 674 respectively.
VersionsThe Prolevel is available in two versions:
•With display and front panel controls,
•Without display and front panel controls — in this case the transmitter must be
configured by the Commulog VU 260 Z handheld terminal or over the optional
Rackbus RS-485 interface.
In all other respects, the two versions are identical. More details on controls and operation
can be found in Chapter 3.
BA143_04
Prolevel transmitters (and other units with Rackbus RS-485)
Rackbus RS-485
Personal computer with
operating software, e.g.
Commutool, Commuwin,
Commugraph
alternative
FXA 675 + ZA 67x
supervisory network
RS-485 adapter or PC card
Fig. 1.3:
The Prolevel FMC 662 can be
used as a stand-alone unit, see
Figs 1.1 and 1.2 or as part of
an operating system.
An RS-485 adapter or PC card
allows direct connection to a
personal computer, the FXA 675
and gateway ZA 67x connection
to a supervisory system using
the Modbus, Profibus or FIP
protocol
Prolevel FMC 662 Chapter 1: Introduction
Endress+Hauser 7

1.3 Measuring principle
The Prolevel FMC 662 measures level on the basis of the capacitance and hydrostatic
measurement principles. In both cases the measured value is processed by the
electronic insert and passed on as a frequency signal.
Capacitance
measurement The probe and vessel form the two plates
of a capacitor, the total capacitance of
which can then be calculated from the
formula:
Ctot =C
1 + 2πε0εrx L pF (1)
--------------------------------
ln (D/d)
whereby
Ctot = total capacitance
C1= capacitance or feed through
ε0= dielectric constant of air (8.85)
εr= rel. dielectric constant of product
D= diameter of vessel
d= diameter of probe
L= length of probe immersed in
product in meters
Measurement in
conducting media If the product conducts, the capacitance is
now determined by the thickness and
properties of the insulating material
surrounding the probe. Equation (1)
applies, whereby the variable D is now the
diameter of the probe with insulation. In this
case the capacitance varies by approx.
300 pF/m.
Measurement is independent of dielectric
constant and not affected by changes in
this variable.
C1
BA143_05
d
L
D
Fig. 1.4:
Capacitance measurement principle
BA143_06
dConducting
product
L
D
insulation
Fig. 1.5:
Measurement in conducting media
Chapter 1: Introduction Prolevel FMC 662
8Endress+Hauser

1.4 Functional description
Fig. 1.6 is a block diagram of the Prolevel FMC 662. The transmitter supplies the power
to the probe. The capacitance measured by the probe is converted into a frequency
signal by the electronic insert located in its head and is transmitted to the Prolevel over
a two-core cable. The signal is then processed to provide the following functions:
Signal processingBy calibrating at two levels, »empty« and »full«, level measurement can be made in the
units entered during calibration. In modes 3 and 5, the measured value on channel 1 is
then modified according to the measurement at channel 2. For non-linear volume/level
relationships, volume can be calculated from level via the vessel characteristic which
describes the shape of the vessel.
The signal resulting from the calibration and linearisation provides a standard 0/4...20 mA
output, proportional to level or volume. Any portion of the measuring range can be taken
to provide a scaled output. The two sets of two relays can be assigned to either measuring
channel to provide level control by switching pumps on and off.
All measured values and the complete configuration can be accessed via the optional
Rackbus RS-485 interface.
Fail-safe operationIf a fault condition is detected, e.g. a break in sensor - transmitter cable, the analogue
signal switches to -10 % or +110 % level or holds the last measured value. The alarm
relay de-energises and the red LED on the front panel lights. In addition, each set of
relays can be set to switch on or off as required.
BA143_07
Channel 1 and 2
Fig. 1.6:
Signal processing in the
Prolevel FMC 662 for single
and twin channel operation
Mode in V8H0 Function
0 Simultaneous level measurement on channels 1 and 2
1 Level measurement on channel 1 only
2 Level measurement on channel 2 only
3 Differential level measurement — the measured value measured at channel
2 is subtracted from that measured at channel 1
5 Level measurement with reference probe— the level measurement at
channel 1 is corrected by the measurement at channel 2
6 Simulation of frequency, level, volume or current at channel 1
7 Simulation of frequency, level, volume or current at channel 2
Table 1.1:
Prolevel FMC 662 operating
modes
Prolevel FMC 662 Chapter 1: Introduction
Endress+Hauser 9

1.5 Technical Data
General specifications
Input characteristics
Output characteristics
Manufacturer: Endress+Hauser GmbH+Co.
Designation: Prolevel FMC 662
Function: Transmitter for level and differential level measurement with
capacitance probes
Input signal: Level proportional PFM signal
Interfaces: 0/4…20 mA, Rackbus RS 485 (option)
Reference conditions: to IEC 770 (TU= 25°C) or as specified
Miscellaneous: CE mark
Signal input, channels 1 and 2
Signal: Pulse frequency modulated signal from connected sensor
Explosion protection: ATEX II (1) GD [EEx ia] IIC, CSA and FM,
intrinsically safe signal circuits separated from the rest of the electronics
Sensor: Capacitance probes with EC 37 Z or EC 47 Z electronic insert
Analogue output
Output: 2 outputs, one per channel, 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
Display and keyboard
Display (LCD): 4 digit measured value display with optional lighting, segmented
current display in 10% steps, various indicators (communication,
signal underflow, overflow)
Light emitting diodes: 1 yellow status LED for every limit relay (lit = relay energised)
1 red alarm LED, lit = alarm — relay de-energised;
flashing = warning — relay remains energised
1 green LED to indicate power on
Keyboard: 6 keys for parameter entry, option available without keys
Interfaces: 0/4…20 mA, Rackbus RS 485 (option)
Reference conditions: to IEC 770 (TU= 25°C) or as specified
Chapter 1: Introduction Prolevel FMC 662
10 Endress+Hauser

Output characteristics
(continued)
Power supply
Environment
Mechanical
specifications
Communication interface
Commulog VU 260 Z:2 communication sockets in terminal compartment
Rackbus RS 485: optional interface for direct connectionto a personal computer via
adapterorinterface card, orto Rackbus via FXA 675 interface card
Rackbus address via 6-gang DIP-switch in terminal compartment
Bus termination via 4-gang switch in terminal compartment
Alternating voltage: 230 V / 115 V / 110 V (85...253 V), 50/60 Hz or
24V / 48V(20...55V),50/60Hz or
Directvoltage: 24 V (16...60V),
residualripplemax. 2 Vpp within tolerance
Power consumption: max. 7 W
Safe isolation: between powersupply and signal outputs, CPU, Rackbus RS-485 and
electronics
Operating temperature:
Limitingtemperature:
Storage temperature:
0°C…60°C
-20°C…60°C
-40°C…80°C
Climatic class:to Table 10, Class R, DIN 40 040, instrument outdoors,
average annualhumidity 95%,dew permissible
Ingress protection:IP 66withclosedhousing and corresponding cable glands
IP40withopenhousing
IP 20withopen terminal compartment
Electromagnetic
compatibility:
Interference Emissionto EN 61326;ElectricalEquipment Class A
Interference Immunity to EN 61326;Annex A (Industrial)
Vibrationresistance:to Table 6,Class W,DIN 40040
Explosion protection:[EEx ia] IIC, see also "Notes onSafety"
Housing: for wall- or post-mounting
Dimensions (l x b x h)292 mm x 176 mmx 253 mm, see Fig. 2.3
Weight: 2.6 kg
Materials:body ABS (acrylnitrilbutadenestyrol)/PC (polycarbonate), RAL 5012 (blue)
transparent cover, polycarbonate
front panel,blue with white field for labelling
Electrical connection
Cable entries:5 pre-stamped cable entries Pg16 inbottom and 4 inrear ofterminal
compartment
4 pre-stamped cable entries Pg13.5 inbottom
Connection:screw terminals for cable cross-sections 0.5 mm2…2.5 mm2
Cable: 2-core, unscreenedcable, max.25 Ωper core forboth channels, see
also p. 16
Prolevel FMC 662 Chapter 1: Introduction
Endress+Hauser 11

2 Installation
This Chapter describes:
•Probes for the Prolevel FMC 662
•Installation of the Prolevel FMC 662
•Transmitter wiring
•Probe connection.
•Hardware configuration for Rackbus RS-485 option
•Technical data.
Fig 2.1 shows the structure of the chapter.
Technicians and fitters It is assumed that suitably qualified personnel are to be used for the installation and
electrical connection of the system components. This is particularly important when the
sensors are to be installed in hazardous areas. Please note the following:
Warning!
•The Prolevel FMC 662 transmitter must be installed outside explosion hazardous
areas.
•Observe the specifications in the certificates as well as local regulations when
mounting the sensors in hazardous areas
Warning!
BA143_08
Mounting the
Prolevel
transmitter
Wiring the
Prolevel
transmitter
Measuring
system
Probe constants
Wiring the
probes Wiring and configuration for
Rackbus RS-485
2.1 2.2 2.3
2.4 2.5
Fig. 2.1:
Structure of Chapter 2,
Installation
Chapter 2: Installation Prolevel FMC 662
12 Endress+Hauser

2.1 Probes
Table 2.1 lists the probes most frequently used with the Prolevel FMC 662 transmitter. In
addition to those listed, all probes which can be used with an EC 37 Z or EC 47 Z
electronic insert can be connected to the transmitter. Installation hints can be taken from
the appropriate Technical Information Sheet.
Probe constantsEC 37 Z/47 Z inserts are supplied with the probe constants zero frequency »fo« and
sensitivity »S«, see Fig. 2.2 below.
Note these constants and enter them into fields V3H5 and V3H6 for channel 1 and V7H5
and V7H6 for channel 2 during commissioning, Section 4.1. This dispenses with the need
for a recalibration of the transmitter on replacement of the sensor or insert.
Principle
Channel 1 or Channel 2
Probe TI sheet Insert
Capacitance DC 11 TI 169F
DC 16 TI 096F
DC 21 TI 208F
DC 26 TI 209F
11 322 Z E 11.81.03
11 500 Z TI 161F
21 211 E 10.73.18
EC 37 Z
EC 47 Z
Multicap TE TI 239
Multicap TA TI 240
Multicap E TI 242
Multicap A TI 243
Table 2.1
Selection of probes suitable for
use with the Prolevel FMC 662
1 3 6542
+I
II
CA (pF) C(S)(pF)
17
d4
d4/z4
7
18
d2
d2/z2
8
FMC480Z
FMC470Z
FMC671/672/676/677Z
HAA420Z
1MHz
EC 47Z
Ex
0,6526,805S
III
fo475,3 57,2
EC10015EP8
BA143_09
sensor constants
Fig. 2.2:
Location of probe constants on
EC 37 Z/47 Z electronic insert
Prolevel FMC 662 Chapter 2: Installation
Endress+Hauser 13

2.2 Prolevel FMC 662 installation
Location Where possible, find a shady, protected spot in which to mount the Prolevel transmitter:
•Nominal operating temperature: 0°C…+60°C
Use a protective hood or provide cooling if the ambient temperature exceeds +60°C. For
temperatures below -20°C insulate the instrument.
Mounting The Prolevel FMC 662, with IP 66 protective housing, can be mounted on a wall or post
outdoors or in the control room. Fig. 2.3 gives details for wall mounting.
Fig. 2.4 shows how the Prolevel can be
post-mounted with the all-weather cover.
The fastenings (nuts and bolts) for both
post mounting and all-weather cover are
supplied with the units.
•
Post mounting :
Material: galvanised steel
(for 2" post Order No. 919 566-0000;
for 1" post: 919 566-1000);
stainless steel 1.4301 (≅SS 304 H)
(for 2" post Order No. 919 566-0001;
for 1" post: 919 566-1001);
Weight: 1 kg
•
Prolevel all-weather cover:
Material: Aluminium, blue paint-finish;
Order No. 919567-000
Material: Steel 1.4301 (≅SS 304 H),
blue paint-finish; Order No. 919567-001
BA143_10
292
min. 52
106
253
275.5
gap
min. 69
201
ø 4.5
Fig. 2.3:
Dimensions in mm of Prolevel
FMC 662 housing
1" = 25.4 mm
BA143_11
Fig. 2.4:
Post-mounting with all-weather cover
Chapter 2: Installation Prolevel FMC 662
14 Endress+Hauser

2.3 Transmitter wiring
Warning!
•Make electrical connections with the power supply switched off!
•The PE terminal strip must be grounded externally (contact protection)!
•When wiring up probes and sensors in explosion hazardous areas, observe the
instructions on the certificate and other local regulations.
Terminal stripThe terminal strip for cable diameters up to 2.5 mm2is located in a separate connection
compartment. Fig. 2.5 shows the wiring diagram for the Prolevel FMC 662 (Terminal 3 is
reserved for the internal protective ground):
•Remove the plastic cover from the front of the connection compartment
•Press out the pre-stamped cable entries as required
bottom: 5 x Pg 16, 4 x Pg 13.5; rear: 4 x Pg 16.
PowerThe power requirements are printed on the nameplate at the right-hand side of the
nameplate, see also Section 2.6, "Technical Data".
•If the specifications on the nameplate do not correspond to those of your
power supply, do not connect up - you may damage the instrument!
•Connect the protective ground to the metallic terminal strip provided at the
left — this ensures safe isolation and contact protection.
•Current output, relay outputs, power connection and sensor input are all
electrically isolated from one another.
Analogue outputsOnly one non-floating device can be connected to each of the current outputs.
•There is no limit to the number of floating devices, other than that imposed by
considerations of the maximum load of 600 Ω.
RelaysFor the switching capacity of the relays see the technical data in Section 2.6.
•Relays 1a and 1b are normally assigned to channel 1
•Relays 2a and 2b are normally assigned to channel 2.
The assignment can be changed by software, see Section 4.4.
RS-485
[EEXia]IIC
B DGND A
L+ L-
L1 N
L+
L-
16...60VDC
85...253VAC
20...55VAC
L1
N
PE
0/4...20mA 0/4...20mA
Sensor1 Sensor2
RxD/TxD-P
RxD/TxD-N
DGND
RS-485
12 3 4 5 6 7 81 82 91 92
3111 21 41
1b
1a 2a 2b
51 61
3212 22 42 52 62 3313 23 43 53 60
- + - +
BA143_12
current channel 1
relays channel 1 relays channel 2 alarm relay
PE terminal strip ground externally
optional interface probe channel 1 probe channel 2
Commulog VU 260Z
bus switches
current channel 2
Fig. 2.5:
Terminal assignments for
Prolevel FMC 662
Warning!
Prolevel FMC 662 Chapter 2: Installation
Endress+Hauser 15

2.4 Probe connection
Probe cable Use commercial 2-core installation cable, max. line resistance 25 Ω/core, for the probe/
transmitter cable — the Prolevel satisfies the quoted EMC standards with this cable.
Level probes
channels 1 + 2 The Prolevel FMC 662 can be operated with a variety of probe types, each requiring an electronic insert:
•EC 37 Z or EC 47 Z
EC 37 Z and EC 47 Z The electronic inserts EC 37 Z and EC 47 Z have two measuring ranges which can be
selected by inserting a bridge between terminals 4 and 5 of the insert, see Fig 2.6. Full
instructions on selection of the insert are to be found in Publication E 07.80.06/1c.
•Note for channel 1 the zero frequency fo____ and sensitivity S_____on the
insert for the range you have selected.
•Note for channel 2 the zero frequency fo____ and sensitivity S_____on the
insert for the range you have selected.
81 82
91 92
EC 37 Z
BA143_13
Channel 1
Insert bridge for
Range II (standard)
Remove for Range I
Ground
connection
Channel 2
Fig. 2.6:
Connection diagram for
electronic inserts
Left: Capacitance/Multicap
EC 37 Z
Right: Capacitance/Multicap
EC 47 Z
81 82
91 92
EC 47 Z
BA143_14
Channel 1
Insert bridge for
Range II (standard)
Remove for Range I
Ground
connection
Channel 2
Chapter 2: Installation Prolevel FMC 662
16 Endress+Hauser

2.5 Rackbus RS-485 option
Wiring the busUp to 25 Prolevel FMC 662 transmitters can be connected to the Rackbus RS-485.
Instructions for wiring and grounding the bus are to be found in Operating Instructions
BA 134F which is delivered with Prolevel instruments having the Rackbus RS-485 option.
The Prolevel can be wired as indicated in the inset in Fig. 2.7.
Note!
•Terminal 62 is connected internally to the PE ground terminal strip
•The screening must be grounded and have electrical continuity throughout. — read
BA 134F for grounding instructions
Bus address and
termination
Fig. 2.8 shows the configuration elements
for remote operation of the Prolevel
FMC 662. Every transmitter must have a
unique bus address:
•Switch off power, loosen screws and
open the terminal compartment
•Set the address at DIP-switch SW1
(Example: 2 + 8 = 10)
For the last transmitter on the bus, i.e.
furthest away from the computer:
•Switch in the terminal resistance at
DIP-switch SW2: OFF; ON; ON; OFF
•Close front panel, tighten screws.
A
L1
L2(>L1)
Master
Rpull
Rt
Master
Rpull
Rt
1
OFF
ON
6061 62
2E
OFF
ON OFF
ON
6061 62606162
1
OFF
ON
60 6162
2E
OFF
ON OFF
ON
6061 62
60 6162
B
PE
PE
Rt
150Ω
Rt
150Ω
PE
PE
BA143_15/16
Fig. 2.7:
Rackbus RS-485 topologies
showing setting of bus
termination resistance
Inset:
Suggestion for wiring the bus
SW1
12481632
150 Ω392Ω392Ω
+5V
(=10)
ON
OFF
ON
OFF
RS-485 [EExia] IIC
B DGND A
L+ L-
L1 N 1b1a 2a 2b
- + - +
SW2
2
BA143_17
bus termination
switch
address switch
terminal compartment
Fig. 2.8:
DIP-switches for bus address and termination
61
PE
60 62
Data B
Data A
Screen
Note!
Prolevel FMC 662 Chapter 2: Installation
Endress+Hauser 17

3 Controls
This Chapter describes how the Prolevel FMC 662 transmitter is operated. It is divided
into the following sections:
•Operating matrix
•Keyboard and display
•Commulog VU 270 Z handheld terminal
•Rackbus RS-485
3.1 Operating matrix
All functions, including the analogue outputs and relay switch points are configured via
the operating matrix, see Figs 3.1 and 3.2:
•Each field in the matrix is accessed by a vertical (V) and horizontal (H)
position which can be entered at the front panel of the Prolevel FMC 662 Z, by
the Commulog VU 260 Z or for the Rackbus RS-485 from a personal computer.
A matrix card, reproduced at the back of this manual, is delivered with the Prolevel
FMC 662 transmitter.
Prolevel FMC 662 display
Parameter at current matrix
position
Pressed together
Move to V0H0
Move H0 …H9, H0
Move V0…V9, V0
BA143_18
Current matrix position
Fig. 3.1:
Prolevel FMC 662
Parameter matrix operation with
function of V and H keys.
The complete matrix has 10 x 10
fields, although not all are used
Diagnostics key - press
to display error
message when icon
blinks
Escape key - press to
move to field 00
Entry key - press to call
or quit parameter entry
Matrix selection keys -
press to move about matrix BA143_19
Commulog display
Parameter
Bar chart of
analogue signal
Fig. 3.2:
Commulog VU 260 Z display and
key functions
The Tag No. and measurement
units are entered in the VAlevel
which can be accessed by the
Commulog or via the Rackbus
RS-485 interface only
Chapter 3: Controls Prolevel FMC 662
18 Endress+Hauser