Endress+Hauser Silometer FMC 672 Z User manual

silometer
FMC 672 Z/677 Z
Level Measurement
Installation and Operating Instructions
BA 064/00/en/06.03
015576-1000
Software 3.x
Hauser + Endress
The Power of Know How

Procedure
*Can be performed in reverse order
Function Channel
1Channel 2Action
1 Reset transmitter V9H5 ●Enter 671:
Use »+« and »-« keys, ⇒ changes digit
Press »E« to register entry
- Omit for second channel and if
commissioned as in Section 4.1
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
4 0/4 mA signal V0H3
V0H5
V0H6
V4H3
V4H5
V4H6
●Enter 0 for 0…20 mA, 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
5 Relay 1 V1H0
V1H1
V5H0
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
Silometer FMC 672 Z/677 Z Measurement at a Glance

FMC 672 Z
FMC 677 Z/Commulog VU 260 Z
Selects vertical matrix position
Selects horizontal matrix position
Select positon V0H0
Selects next digit
Move decimal point
Increases value of digit
Decreases value of digit
Registers entry
Select matrix position
Selects position V0H0
Calls error diagnosis
Calls entry mode
Select next digit
Increase and decrease value
Move decimal point to left
Move decimal point to right
Registers entry and quits mode
Breaks off entry without storing value
Measured
value
Bar chart
Matrix
selection
Relay status
red: de-energised
green: energised
Parameter entry
Commulog
sockets
Alarm relay
lit: fault
Current output
check
Matrix position
0 100
VH
00
1
2
VH
+
E
+
-
mA2
+
-
mA1
FMC 672 Z
1
2
+
-
mA2
+
-
mA1
FMC 677 Z
Relay status
red: de-energised
green: energised
Commulog
sockets
Alarm relay
lit: fault
Current output
check
See also »Controls«, Chapter 3
Silometer FMC 672 Z/677 Z Measurement at a Glance
1

Table of Contents
Measurement at a Glance . . . . 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
2 Installation . . . . . . . . . . . . . . 10
2.1 Probes and sensors . . . . . . . . . . . 10
2.2 Silometer installation . . . . . . . . . . . 11
2.3 Transmitter wiring . . . . . . . . . . . . 13
2.4 Sensor connection . . . . . . . . . . . . 16
2.5 Hardware configuration . . . . . . . . . . 17
2.6 Technical data: Silometer FMC 672 Z/677 Z
transmitter . . . . . . . . . . . . . . . 18
3 Controls . . . . . . . . . . . . . . . 19
3.1 Commutec operating matrix . . . . . . . . 19
3.2 Configuration and display:
Silometer FMC 672 Z . . . . . . . . . . . 20
3.3 Configuration and display:
Silometer FMC 677 Z . . . . . . . . . . . 21
4 Calibration and Operation . . . . . . . 22
4.1 Commissioning . . . . . . . . . . . . . 22
4.2 Calibration: level measurement . . . . . . 23
4.3 Calibration: volume measurement . . . . . . 24
4.4 Level offset . . . . . . . . . . . . . . . 25
4.5 Measured value display . . . . . . . . . 26
4.6 Locking the parameter matrix . . . . . . . 26
5 Linearization . . . . . . . . . . . . . 27
5.1 Linearization for a cylindrical, horizontal tank . 28
5.2 Linearization for a tank with conical outlet . . 29
5.3 Other linearization modes . . . . . . . . . 32
6 Analogue Outputs . . . . . . . . . . . 33
6.1 Analogue output settings . . . . . . . . . 34
7 Limit Switches . . . . . . . . . . . . 36
7.1 Control parameters . . . . . . . . . . . 37
7.2 Relay operating modes . . . . . . . . . . 38
8 Other Applications . . . . . . . . . . 41
8.1 Differential level measurement . . . . . . . 42
8.2 Level measurement with reference probe . . 44
9 Trouble-Shooting . . . . . . . . . . . 46
9.1 Trouble-shooting tables . . . . . . . . . 46
9.2 Simulated operating mode . . . . . . . . 49
9.3 Exchanging transmitters, probes and
electronic inserts . . . . . . . . . . . . 50
9.4 Repairs . . . . . . . . . . . . . . . . 50
10 Quick Programming Guide . . . . . . . 51
10.1 Level measurement (2 channels) . . . . . . 51
10.2 Level measurement (Channel 1) . . . . . . 52
10.3 Linearization for horizontal cylinder or
conical outlet . . . . . . . . . . . . . 53
10.4 Differential level measurement . . . . . . . 54
10.5 Level measurement with reference probe . . 55
Index . . . . . . . . . . . . . . . . 56
Operating Matrix . . . . . . . . . . . 58
Silometer FMC 672 Z/677 Z Table of Contents
2

Notes on Safety
The Silometer FMC 672 Z/677 Z is a level measurement transmitter which can be used
with a variety of probes and sensors. It must be installed by qualified personnel according
to the instructions in this manual.
CertificatesThe Silometer FMC 672 Z/677 Z transmitter is available with certificate. 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 2.6, that in the certificate applies.
Certificate Instruments Notes
PTB 02 ATEX 2203 X Silometer FMC 672 Z/677 Z II (1) GD
[EEx ia] IIC/IIB,
install outside Ex-area
PTB 98 ATEX 2215 X DC 12 TE, DC .. TE ., DC .. E ., DC ..
Capacitance probes
11500 Z(M), 11961 (Z), 21561 (Z)
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
electronic insert EC 17/37/47 Z, FEC 12
II 1 G,
EEx ia IIC/IIB T6
Z-65.13-107 DC 12 TE, DC .. TE ., DC .. E ., DC ..
Capacitance probes
11500 Z, 11961 Z, 21561 Z
electronic insert EC 37/47 Z, FEC 12,
HMC 37/47 Z
FMC 470, FMC 671/672 Z,
FMX 570 Z, FMX 770,
SIF 100/110
Continuous level measurement
for overspill protection in
stationary vessels
(for storage of non-combustible,
water-polluting liquids)
German Lloyd
GL No. 97517 HH
Silometer FMC 672 Z
Capacitance probes
electronic insert EC 37 or EC 47
electronic insert EC 17 Z
Level indication on channel 1
(EC 37 Z or EC 47 Z)
Level limit detection on channel 2
(EC 17 Z)
Suitable for unlimited use within
the rules
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
Silometer FMC 672 Z/677 Z Notes on Safety
3

Silometer FMC 672 Z/677 Z Notes on Safety
4

1 Introduction
Quick Operating GuidesThe front cover contains short instructions for the standard set-up, continuous level
measurement with capacitance probes, which is used in 80% of applications.
For Users familiar with the operating matrix of Endress+Hauser Commutec transmitters
in general and the Silometer FMC 672 Z/677 Z in particular, a Quick Operating Guide for
the most important operating modes is to be found in Chapter 10.
In this manualUsers unfamiliar with the Silometer FMC 672 Z/677 Z must read the operating
instructions. Since it is not possible to describe all applications in detail, the standard
application used in 80% of all applications, continuous level measurement, has been
used as the basis for the functional description. Other applications as listed in Section 1.1
are described in Chapter 8. The 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 for the plug-in card.
•Chapter 3: Controls;
describes operation with the front panel keys, Commulog VU 260 Z
and ZA 672.
•Chapter 4: Calibration and Operation;
tells you how to commission the Silometer for the standard
application of continuous level measurement.
•Chapter 5: Linearization
tells you how to calibrate the Silometer to measure volume in a
horizontal cylindrical tank or a tank with a conical outlet.
•Chapter 6: Analogue Outputs;
describes in detail the setting of the 0/4…20 mA signal line.
•Chapter 7: Limit Switches;
describes in detail the setting of the relays.
•Chapter 8: Other Applications;
describes the configuration of the Silometer for further applications not
covered in Chapter 4.
•Chapter 9: 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 10: Quick Programming Guide;
provides configuration flowcharts for the principle applications.
•Chapter 11: Index;
lists key words to help you find information quickly.
Further documentationIn addition to this manual, the following publications provide information on configuration
of the Silometer FMC 672 Z/677 Z.
•BA 028 Commulog VU 260 Z handheld terminal
•BA 054 ZA 672 Modbus Gateway
Installation of the probes, electronic inserts and accessories are 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.
Silometer FMC 672 Z/677 Z Chapter 1: Introduction
5

1.1 Application
The Silometer FMC 672 Z/677 Z is designed for level measurement on one or two
channels with a capacitance or impedance probe. The applications described in this
manual are as follows:
•Continuous level measurement (Chapter 4)
•Volume measurement in horizontal or conical tanks (Chapter 5)
•Differential level measurement (Chapter 8)
•Continuous level measurement with reference probe (Chapter 8).
Silometer transmitters may also be used for applications in explosion hazardous areas
and possess intrinsically-safe sensor circuits conforming to EEx ia IIC and IIB. A list of
certificated combinations is to be found in »Notes on Safety« preceding this chapter.
0/4...20 mA,
0/2...10V
outputs
Min./max.
relays
Silometer
FMC 672 Z/
677 Z
transmitter
BA064E01
Liquids
Bulk solids
Channel 1
non-Ex
Channel 2
Fig. 1.1:
Standard application showing
Silometer FMC 672 Z controlling
level measurement
➀ in liquids
➁ in bulk solids
level 1
BA064E02
difference
h2- h1
Fig. 1.2:
Level difference measurement
with rake control by
Silometer FMC 672
Right:
Silometer FMC 672 Z used for
continuous level measurement
with reference probe
① Measuring probe
② Reference probe
Channel 2 Channel 1
Level
Channel 2
Channel 1
BA064E03
Ex non-Ex
Silometer FMC 672 Z/677 Z Chapter 1: Introduction
6

1.2 Measuring system
A working system for level measurement comprises:
•Silometer FMC 672 Z/677 Z transmitter,
•Capacitance or impedance probe
•Electronic insert EC 37 Z or EC 47 Z.
The Silometer may operate as a stand alone unit with standard 0/4…20 mA and 0/2…10 V
outputs. Two relays, freely assignable to channel 1 or 2, can be used to control pumps,
valves, annuciators etc.. An alarm relay monitors the correct functioning of the
measurement point and trips on fault condition. If controlled remotely with other
Commutec transmitters within a process control system, the Silometer is addressed by
the Rackbus. In this case, communication is controlled by a ZA 672 Modbus Gateway,
see Fig 1.3, or any other ZA 67…Gateway.
VersionsThe Silometer is available in two versions:
•FMC 672 Z with display and front panel controls, with remote configuration
facilities,
•FMC 677 Z for remote configuration by Commulog VU 260 Z handheld
terminal or via ZA 67…/672 interface.
In all other respects, the two versions areidentical. More details on controls and operation
can be found in Chapter 3.
BA064E04
Commutec transmitters
Rackbus
Personal
computer or
PC system
Programmable logic
controller with Modbus port
Sensors Actuators
RS-232C interface
Modbus interface
ZA 370
or
ZA 371
ZA 672
Fig. 1.3
The Silometer FMC 672 Z/677 Z
can be used as a stand-alone
unit or as part of a process
control system
Silometer FMC 672 Z/677 Z Chapter 1: Introduction
7

1.3 Measuring principle
The Silometer FMC 672 Z/677 Z measures level on the basis of the capacitance/
impedance measurement principle. The measured value processed by the electronic
insert and passed on as a frequency signal.
Capacitance/impedance
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
For vessels with a diameter greater than 1 m, the capacitance varies by approx. 12 pF
per meter of covered probe.
Measurement in
conducting media If the product conducts, the capacitance is
determined by the thickness and quality 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
BA064E05
d
L
D
Fig. 1.4
Capacitance measurement principle
BA064E06
dConducting
product
L
D
Fig. 1.5
Measurement in conducting media
Silometer FMC 672 Z/677 Z Chapter 1: Introduction
8

1.4 Functional description
The capacitance or pressure measured by the sensor is converted into a frequency
signal by the electronic insert located in its head. The Silometer FMC 672 Z/677 Z
supplies the power and receives a level-proportional frequency signal over a two-core
cable. The signal is then processed to provide the following functions:
Silometer functions•
Level measurement
By calibrating at two levels, »empty« and »full«, level measurement can be made in
the units entered during calibration.
•
Volume or weight measurement
For non-linear volume/level relationships, volume can be calculated from level via
the vessel characteristic which describes the shape of the vessel. This function is
described under »Linearization« in Chapter 5. If this function is invoked, volume is
indicated at field V0H0 on the LC-display and level at V0H9.
•
Differential level measurement
By using two probes and subtracting the measured levels, the Silometer can
provide a differential level measurement.
•
Level measurement with reference probe
When the dielectric constant of the liquid changes or is unknown, the Silometer can
be configured to provide a corrected level measurement on channel 1 by using a
reference probe connected to channel 2.
•
Analogue output
The signal resulting from the calibration and linearisation provides a standard
0/4...20 mA and 0/2...10 V output, proportional to level or volume. Any portion of the
measuring range can be taken to provide a scaled output.
•
Relay control
The two relays can be assigned to either measuring channel to provide level control
by switching pumps on and off.
•
Rackbus signal
The measured values and complete configuration can be read by the ZA 672
Modbus Gateway (and ZA 67…computer interface) for integration into process
control systems and visualisation on personal computers.
•
Fail-safe operation
If 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.
In addition, each relay can be individually set to switch on or off as required.
frequency
analog
digital
current
voltage
sens. [Hz/pF]offset [Hz]
offset [pF] sens. [pF/cm]
range upper limit
V2
range lower limit
V1
frequency
electronic-
insert electronic- insert
capacit.
volume
V2
V1level
volume
H2
H1
level
capacit.
level zero point shift
BA064E07
Fig. 1.6
Signal processing in the
Silometer FMC 672 Z/677 Z
for single channel operation
Silometer FMC 672 Z/677 Z Chapter 1: Introduction
9

2 Installation
This Chapter describes:
•The probes for use with the Silometer FMC 672 Z/677 Z
•Silometer installation in a rack or Monorack housing
•Transmitter wiring
•Sensor connection.
•Hardware configuration for Commulog VU 260 Z or ZA 67…operation
•Technical data.
Warning!
•The Silometer FMC 672 Z/677 Z transmitter must be installed outside explosion
hazardous areas.
2.1 Probes and sensors
Table 2.1 lists the sensors most frequently used with the Silometer FMC 672 Z/677 Z
transmitter. In addition to those listed, all special 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.
Sensor contants EC 37 Z/47 Z inserts are supplied with the sensor constants zero frequency »fo« and
sensitivity»S« printed on the name plate. Note these constants and enter them into fields
V3H5/V3H6 and V7H5/V7H6 during commissioning, Section 4.1. This dispenses with the
need for a recalibration of the transmitter on replacement of the sensor or insert.
Principle Probe TI sheet Insert
Capacitance
E 09.83.02
11 302 (Z) E 02.78.01
11 303 Z TI 072
11 356 E 02.78.03
11 400 E 10.73.15
11 322 Z E 11.81.03
21 110 E 10.73.19
21 111 E 10.73.17
21 211 E 10.73.18
21 310 (Z) E 10.73.20
21 315 (Z) E 10.73.21
EC 37 Z
EC 47 Z
Impedance Multicap DC 11, DC 16 EC 37 Z
EC 47 Z
Table 2.1
Selection of probes suitable for
use with the Silometer
FMC 672 Z/677 Z
1 3 6542
+I
II
CA (pF) C(S)(pF)
17
d4
d4 / z4
7
18
d2
d2 / z2
8
FMC 480 Z
FMC 470 Z
FMC 671 / 672 / 676 / 677 Z
HAA 420 Z
1 MHz
EC 47 Z
Ex
0,6526,805S
III
fo475,3 57,2
EC10015EP 8
BA064E08
Fig. 2.1:
Electronic insert EC 37 Z/
EC 47 Z showing position of
sensor constants
Silometer FMC 672 Z/677 Z Chapter 2: Installation
10

2.2 Silometer installation
There are three possibilities for installing Silometer transmitters:
•Standard 19" rack with space for 12 7HP cards,
•Field housing with space for up to 6 7HP cards,
•Monorack housings for single transmitters.
Rack installationA Racksyst system can be ordered fully wired, in which case the sensors and the external
power supply only need to be wired. Planning hints can be found in Publication
E.05.84.05/1 c, »Racksyst Assembly Racks«.
For non-Racksyst installations and for installations including non-Racksyst cards, fill the
rack as follows (see also Fig. 2.2):
Rack arrangement
Step Procedure
1 Allocate the power supply (NT 470) at the rightmost position.
- If two NT 470s are used, install a 2 HP dummy panel between them.
2 Install non-intrinsically safe transmitters next to the power supply.
- Install a 2 HP dummy panel between all foreign transmitters and between
Racksyst cards and foreign transmitters
3 Install intrinsically safe transmitters to the left of the rack.
- Install foreign cards first.
- Install dummy panels between all foreign transmitters and between Racksyst
cards and foreign transmitters in accordance with the instructions on the
Ex-Certificate.
- No spacer is required between Racksyst cards.
Racksyst field housingInstructions for installing Commutec transmitters in the Racksyst field housing with half
19" rack are to be found in Publication PI 003.
•Check that the field housing is not installed in direct sunlight.
- If appropriate fit a protective sun cover.
•The maximum permissible ambient temperature for the field housing varies
between +50…+60 °C according to the power consumption of the cards
(0…20 W)
BA064E09
Non-E+H
(Ex)i devices E+H (Ex)i devices E+H devices Non-E+H devices NT power supply
Spacing between
non-E+H (Ex)i devices
as per certificate
2 HP dummy panel between
E+H and non-E+H devices
Fig. 2.2:
Recommended arrangement for
Racksyst rack assemblies
Silometer FMC 672 Z/677 Z Chapter 2: Installation
11

Monorack housing The Silometer FMC 672 Z/677 Z transmitter and Monorack housing are supplied
separately. The system must be assembled as shown in Fig. 2.3 before use.
•The Monorack is prepared for wall- or rail-mounting, degree of protection
IP 40 or IP 30 respectively.
•The site must be chosen such that the operating temperature of
-20°C…+60°C for one Monorack and -20°C…+50°C for Monorack banks is
not exceeded.
Full details of the Monorack installation procedure can be taken from the manual supplied
with it.
Monorack protective
housing If the Silometer FMC 672 Z/677 Z transmitter and Monorack housing are to be mounted
at an exposed site, then it is recommended that they be installed in the protective
housing, degree of protection IP 55, which is available as an accessory.
•The protective housing accomodates two Silometer FMC 672 Z/677 Z
transmitters.
•The permissible ambient temperature is -20°C…+50°C for one Monorack and
-20°C…+40°C for two.
Dimensions and instructions for installation are to be found in the Technical Information
sheet TI 099/00/e.
BA064E10
Plug-in card
Monorack
housing
Monorack base
(terminal block)
Retaining
screws
Retaining
flap
Fig. 2.3:
Assembly and disassembly of
the Monorack housing
Power
pack
Fig. 2.4:
Monorack protective housing
Silometer FMC 672 Z/677 Z Chapter 2: Installation
12

2.3 Transmitter wiring
Warning!
•Make electrical connections with the power supply switched off!
•When wiring up probes and sensors in explosion hazardous areas, observe the
instructions on the certificate and other appropriate regulations.
Rack wiringFig. 2.5 is a pin assignment diagram for the Silometer FMC 672 Z/677 Z.
•Terminals z 30, b 14, d 14 and b 10 are connected internally
•Inputs d2, d4 and z2, z4 are electrically isolated from the circuit and each
other.
•The circuit zero of the unit ( ⊥) is connected to the negative terminal of the
supply voltage.
Note!
•Two indexing pins, at positions 1 and 23 in the rack connector ensure that Silometer
FMC 672 Z/677 Z transmitters only can be inserted at these points. The pins must
be inserted if the rack is not custom built by Endress+Hauser.
Rackbus
2
1
+
-
z2
z4
L
L+ 20 V...30 V
z30
d32
d2
d4
+ZA 67...
d10
b10
z18
d20
z20
z22
d24
z24
r
u
a
r
u
a
rz26
d28
z28
u
a
d b z
+ +
2
4
10 +
6
8
12 + + +
14 +
16
18
20 u
22
24 u
26
28 u
30 L
32 L+
+
+
z14 0/2...10 V
+
+
b12
b14 0/2...10 V
+
+
z12
d14 0/4...20 mA
+
+
d12
d14 0/4...20 mA
2
1
+
-
d2
d4 EC 37 Z/EC 47 Z
EC 37 Z/EC 47 Z
r
a
r
a
r
a
Analogue
outputs
Relay ➀
Alarm relay
Power supply
Relay ➁
Level ,
volume
Relay ➀
Relay ➁
BA064E11
Alarm relay
FMC
672 Z
677 Z
Non-Ex- area
Input channel 1
Input channel 2
DC supply
Ex-area
Remote dialog
Current ➁
Voltage ➁
Rackbus
Capacitance/
Multicap probe
Capacitance/
Multicap probe
Inputs
Current ➀
Voltage ➀
Fig. 2.5:
Pin assignment diagram for
Silometer FMC 672 Z/677 Z with
capacitance probes.
Silometer FMC 672 Z/677 Z Chapter 2: Installation
13

Rackbus For system use, wire the Rackbus as shown in Fig. 2.6.
•For ZA 672 - Computer/PLC wiring see Operating Instructions BA 054E.
•Be sure that the system is properly grounded. A difference in ground potential
between the Modbus device/personal computer serial connectors and the
ZA 672 Modbus Gateway can cause damage to the equipment or loss of
module programs
Analogue and relay
outputs The negative terminal of the current output, of the voltage output and of the supply voltage
are connected to the circuit zero of the Silometer FMC 672 Z/677 Z module.
•Any number of measurement and control units can be connected in parallel to
the voltage output, provided that all potentials are related to negative terminal
of the 24 V supply (RL≥10 kOhm).
•Only one non-floating device can be connected to each of the current
outputs.
•There is no limit to the number of floating devices, apart from that imposed by
considerations of maximum or minimum load.
Alarms and limit switch relays can be connected as shown in Fig. 2.7.
•Max. current per wire 3A : for switching capacity see Section 2.6.
BA064E13
Max. 64
Commutec
transmitters in
parallel on
Rackbus
Commutec transmitters FMB, FMC, FMU, PMX, TMT etc.
Fig. 2.6:
Rackbus wiring diagram
Max. current per wire 3 A BA064E12
Fig. 2.7:
Suggestions for wiring together
relays and alarms
Recommended
Alternative 1
Alternative 2
Silometer FMC 672 Z/677 Z Chapter 2: Installation
14

Monorack wiringFig 2.8 shows the terminals in the base of the Monorack II housing, the pin assignments
correspond to those in Fig. 2.5. When connecting together several Monoracks, follow
the instructions supplied with the housing.
•Set the jumper to the position "Racksyst I".
•Insert the coding pins supplied at positions 1 and 23 in the female connector
in the base of the housing.
•The pin designation printed in black are valid for Silometer FMB cards.
If you are installing the Silometer FMB in a Monorack I housing, please note that there is
no jumper switch. In addition, for the 24 V version, the dummy card in the power control
slot must be replaced by the 24 V card suppied.
Power
control slot
Jumper set for
Racksyst I card
BA064E14
Power
Outputs, use
black marked
see Fig. 2.5
Channel 1, d2, d4
Insert coding
pins at
positions
1 and 23
Hole for mounting
screw
Hole for mounting
screw
Channel 2, z2, z4
Fig. 2.8:
Layout of Monorack II terminal
blocks
Silometer FMC 672 Z/677 Z Chapter 2: Installation
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2.4 Sensor connection
The Silometer FMC 672 Z/677 Z can be operated with a variety of sensor types, each
requiring an electronic insert:
•EC 37 Z or EC 47 Z for capacitance and impedance probes
Sensor cable Use commercial 2-core installation cable, max. line resistance 25 Ω/core, for the sensor/
transmitter cable. If electromagnetic interference is to be expected, we recommend
•that the PFM negative line be grounded at the sensor (check Ex-regulations)
•for heavy interference that shielded cable be used, grounded at both ends.
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 Figs 2.9. Full
instructions on selection of the insert are to be found in Publication E 07.80.06/1c.
•Note the zero frequency fo____ and sensitivity S_____on insert, channel 1.
•Note the zero frequency fo____ and sensitivity S_____on insert, channel 2.
BA064E15
Channel 1 Insert bridge for
Range II (standard)
Remove for Range I
Ground
connection
Channel 2
Fig. 2.9:
Connection diagram for
electronic inserts
Left: EC 37 Z
Right: EC 47 Z
Channel 1
Channel 2
Ground
connection
Insert bridge for
Range II (standard)
Remove for Range 1
BA064E16
Silometer FMC 672 Z/677 Z Chapter 2: Installation
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2.5 Hardware configuration
Fig. 2.10 shows the configuration elements for remote operation of the Silometer
FMC 672 Z/677 Z transmitter.
Commulog VU 260 Z/
VU 160
The Silometer is supplied configured for operation with the Commulog handheld terminal,
with the hook switch connected to the contact nearest the front panel.
•If the handheld terminal is to be used during computer operation, the card
must first be reconfigured for Commulog operation
ZA 672 Modbus gatewayConfigure the Silometer card for remote operation via the ZA 672 Modbus gateway (or
ZA 67…computer interface) as follows:
•Set the hook switch to ZA 672/ZA 67…operation as indicated (contact
nearest the backplane connector).
•Set a unique device address between 0 and 63 at the address switch.
- When off, each switch has the value 0.
- When on, each switch is assigned the value shown in Fig. 2.10, inset.
- In the example the address is 2 + 8 = 10.
A full description of ZA 672 operation is to be found in Publication BA 054E.
Caution!
•Electrostatic discharge can degrade performance or damage electronic modules.
Touch a grounded object to rid yourself of charge before handling the modules.
Front panel
BA064E17/18
Towards front panel:
VU 260 Z/160
Backplane
connector
Address = 2 + 8 = 10
Towards backplane connector:
ZA 672/ZA 670
Address
switch
Communications
switch
Fig. 2.10:
Configuration elements of
Silometer FMC 672 Z/677 Z
Silometer FMC 672 Z/677 Z Chapter 2: Installation
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2.6 Technical data: Silometer FMC 672 Z/677 Z transmitter
Construction •Design: 19", 7 HP, plug-in card
•Front panel: black synthetic with blue field inlay, grip and markings,
Protection: IP 20 (DIN 40050)
•Dimensions: see diagram
•Weight: approx. 0.3 kg
•Operating temperature: -0°C...+70°C
Storage temperature: -20°C...+85°C
Electrical connection •Multipoint plug: conforming to DIN 41612, Part 3, Type F (28-pole)
Coding pins in positions 1 and 23
•Power supply: 24 V DC (+6V…-4V); residual ripple 2V, within tolerance
•Supply current: approx. 90 mA, max. 125 mA
•Signal inputs: Electrically isolated from the rest of the circuitry.
Protection [EEx ia] IIC or IIB
•Probes: Capitance probes, impedance probes
with EC 37 Z or EC 47 Z electronic insert
•Electromagnetic Interference Emission to EN 61326, Electrical Equipment Class A
compatibility: Interference Immunity to EN 61326
Outputs •Analogue output: 0...20 mA/4...20 mA selectable, RLmax. 500 Ω
0...10 V/2...10 V selectable, RLmin. 10 k Ω
•Relays Two independent relays each with a potential-free
change-over contact; freely selectable switching range
and hysteresis, fail-safe mode maximum or minimum
selectable
Third relay for fault indication
Max. switching capacity:
2.5 A, 250 VAC, 300 VA at cos ϕ> 0.7
or
100 VDC, 90 W
Indication and
configuration •FMC 672 Z LCD and 6 buttons on front panel.
6 LEDs for function control, also configurable via
Commulog handheld terminal or ZA 672/ZA 67…
•FMC 677 Z 6 LEDs for function control, configuration using Commulog
handheld terminal or ZA 672/ZA 67…interface.
Certificates •FMC 672 Z/677 Z Intrinsically safe circuit to [EEx ia] IIC and IIB
(PTB No. Ex-88.B.2050 X)
see also »Safety Notes«.
BA064E19
Fig. 2.11
Silometer FMB 672 Z/677Z
plug-in card
Silometer FMC 672 Z/677 Z Chapter 2: Installation
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