Fema I4 Series User manual

www.fema.es
SERIES I4 · Model I4L
USER’S MANUAL
ISOLATED
SIGNAL
CONVERTER
Section INDUSTRIAL
5583r00
INDUSTRIAL
Weight
Kg
Load cell mV
+
-

FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
2
SIGNAL CONVERTER I4L
Signal converter for load cells and millivolts, isolated, industrial applications
1. How to order
1. How to order . . . . . . . . . . . . . . . . . . . . . . . . .2
2. Material included . . . . . . . . . . . . . . . . . . . . . . 2
3. Additional information. . . . . . . . . . . . . . . . . . . . 2
4. Installation and start-up . . . . . . . . . . . . . . . . . . . 3
5. SOS mode . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6. Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7. Practical load cell information . . . . . . . . . . . . . . . . 4
7.1 Number and type of cells accepted 4
7.2 Load cell and ‘sense’ wires 4
7.3 Millivolt mode 4
7.4 Load cell with external power 4
7.5 Connecting the cell to the ground 4
7.6 Connections with a junction box 5
7.7 How to calculate the input signal range 5
7.8 Connections with 3 or 4 load cells 5
8. Predened conguration codes . . . . . . . . . . . . . . .6
9. Connections and dimensions (mm (inch)) . . . . . . . . . . 7
10. Input signals . . . . . . . . . . . . . . . . . . . . . . . . 8
10.1 Load cell signals 8
10.2 Millivolts signals 9
11. Technical specications . . . . . . . . . . . . . . . . . 10
12. How to operate the instrument . . . . . . . . . . . . . . 12
12.1 Conguration system 12
12.2 ‘Normal mode’ of operation 12
12.3 How to operate the ‘Conguration menu’ 12
12.4 How to operate the ‘Force’ menu 13
12.5 How to activate the ‘Messages’ function 13
12.6 Fast and advanced congurations 13
13. Conguration menu. . . . . . . . . . . . . . . . . . . . 14
13.1 Function codes 14
13.2 Initial conguration 14
13.3 Output range 14
13.4 Advanced scaling 15
13.5 Field correction 16
13.6 Display information 16
13.7 Key ‘UP’ (‘force’ menu) 17
13.8 Key ‘LE’ (‘messages’ function) 17
13.9 ‘Tools’ menu 18
14. Full conguration menu. . . . . . . . . . . . . . . . . . 20
15. Factory default parameters. . . . . . . . . . . . . . . . 22
16. Error codes . . . . . . . . . . . . . . . . . . . . . . . . 22
17. Precautions on installation. . . . . . . . . . . . . . . . 23
18. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . 23
19. CE declaration of conformity . . . . . . . . . . . . . . . 23
INDEX
USER’S MANUAL
The instrument is provided with the following elements:
• 1 x instrument I4L
• 4 x plug-in screw terminals
• 1 x quick installation guide
2. Material included
User’s Manual www.fema.es/docs/5583_I4L_manual_en.pdf
Datasheet www.fema.es/docs/5585_I4L_datasheet_en.pdf
Quick installation guide www.fema.es/docs/5587_I4L_installation_en.pdf
CE declaration www.fema.es/docs/5642_CE-Declaration_I4_en.pdf
Warranty www.fema.es/docs/4153_Warranty1_en.pdf
Web www.fema.es/Series_I4
3. Additional information
When the marks ‘Attention’ or ‘Risk of electrical shock’
appear, read the documentation for information about the
nature of the risk.
Reference Description
I4L Signal converter for load cells
I4L.1442 Signal converter for load cells with custom features
Isolated signal converter for load cell signals and millivolts. Provides +5 Vdc excitation voltage to power the load cell, and ‘sense’ function to compensate for
excitation voltage variations. Accepts direct connection of 1, 2 3 or up to 4 load cells (typical 350 Ohm load cells). Accepts 4 and 6 wire load cells. Accepts
unipolar and bipolar ranges up ±80 mV.
Congurable output in 4/20 mA (active or passive) or 0/10 Vdc. Universal
power supply from 18 to 265 Vac/dc. 3 way isolation between input, output
and power circuits. Circuit isolation prevents ground loops and transient
propagation, protecting remote equipment and signal integrity.
Predened conguration codes available for fast and easy conguration.
Advanced conguration menu available to customize input and output
signal ranges to specic values required. ‘Tare’ function accessible from
front keypad. Conguration through front push-button keypad. Front display
available for conguration and system information (tare value, input signal
value, output signal value, congured label, signal percentage, process
value, excitation voltage and excitation current values).
Built-in ‘force’ functions to manually generate low and high output signals,
to validate remote instrumentation during installation. ‘SOS’ mode to help
on critical maintenance and repairs. Congurable power frequency rejection
lter. ‘Password’ function to block non-authorized access to ‘conguration
menu’.
Designed for industrial use, with potential integration into a wide range of
applications, reduced cost, excellent quality and available customization.

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
www.fema.es 3
The instrument includes a congurable ‘messages’ function that provides
advanced information about the system, available to the operator with a
single click at the front key ‘LE’ (3).
This information is helpful during start-up, installation, system
verication, routine maintenance and troubleshooting, as messages and
values provide information on the actual input and output signal value,
actual percentage of the input signal compared to the full scale, scaled
process values and excitation voltage and excitation current provided to
the load cell.
This information is available at any time, and is displayed sequentially
when requested (except while on ‘SOS mode’). Access to this information
reduces maintenance time, improves time invested in failure location,
and helps for an easy resolution of the problem.
Additionally, each instrument can be assigned a custom label code of up
to 8 characters (see 4), that can be displayed at the front display or at the
messages sequence, making system identication of each instrument
an easy task.
To congure the ‘messages’ function, see section 13.8.
Table 1 |Available label codes
Letters Numbers Special
An 0 -
b o 1 _
c P 2 .
d q 3 º
E r 4 (blank)
F S 5
G t 6
h u 7
I V 8
J W 9
K X
L Y
M Z
6. Messages
Labeling examples: an application measures weight from ve different
load cells, at the four corners of a platform and the center. All signals are
converted to 4/20 mA for retransmission to PLC or SCADA. Each I4L can
be congured the following label for easy identication :
• Label for instrument 1: cornEr1
• Label for instrument 2: cornEr2
• Label for instrument 3: cornEr3
• Label for instrument 4: cornEr4
• Label for instrument 5: cEntEr
If this is the rst time you are conguring the instrument, below
are the steps to follow during a rst installation. Read all the
manual sections in order to have a full and clear view of the
characteristics of the instrument. Do not forget to read the installation
precautions at section 17.
1. Install the instrument at the DIN rail
2. Read how to operate the instrument (see section 12)
3. Read the ‘practical load cell information’ (see section 7)
4. Connect the input, the output and the power terminals (see section 9).
• error messages may appear in the process of connection (see
section 16), for example, if ‘sense’ is not yet connected, or there is
no current owing to the cell, because the cell is still not connected.
5. Congure the input and output signals
• choose a predened conguration code (see section 8)
• introduce the code at the instrument (see section 13.1)
6. If
needed, customize the input and output signal ranges (see section 13.4)
• if needed, correct the slope of the load cell using the ‘eld correction’
functions (see section 13.5) or manually operating the ‘input signal
low’ and ‘input signal high’ parameters (see section 13.4)
• if needed, apply a ‘tare’ to the system (see section 13.4)
7. If needed, congure the display reading (see section 13.6), the key ‘UP’
(5) ‘force’ menu (see section 13.7), and the key ‘LE’ (3) ‘messages’ function
(see section 13.8)
8. If needed, block access to the ‘conguration menu’ (see section 13.9)
4. Installation and start-up
The instrument includes a congurable ‘SOS mode’ function that provides
a way to manually congure a xed output signal. This output signal
remains xed, independent of the input signal value or sensor state.
This function allows to perform urgent maintenance or repair tasks at
the input section of the system, for example replacing damaged sensors,
while the instrument still provides a controlled signal that allows the
process to continue its activity, under human surveillance. When the
maintenance or repair task has been performed, the instrument can be
taken back to the standard working mode, where the output signal is
proportional to the input.
When manually activated, the ‘SOS mode’ generates the output signal
congured, and the front display remains ashing with the message
‘SoS’. All other systems are disabled, which means that :
• no error messages will be shown on display
• no key ‘UP’ (5) ‘fast access’ menu is accessible
• no key ‘LE’ (3) ‘messages’ function is accessible
• no ‘Eco’ mode activates
Only key ‘SQ’ (<) is accessible, to access the ‘conguration menu’
(eventually this access can be password locked) in order to deactivate
the ‘SOS mode’. Deactivation of ‘SOS mode’ must be performed manually
by conguring the function to ‘oFF’.
To congure the ‘SOS mode’ function, see section 13.9.
5. SOS mode

FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
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The instrument can be congured to read signals from load cells which
are externally powered up to 10 Vdc, and not use the power provided by
the instrument.
Congure the instrument to read in ‘load cell’ mode and set the excitation
voltage parameter to ‘off’. Connect the ‘sense’ wires to the excitation
voltage terminals of the load cell. With the ‘sense’ wires, the instrument
will compensate for variations of the power supply.
With this conguration, values indicated in mV’ units (see section 10.1),
are scaled to a theoretical power value of 5 Vdc, therefor values may not
be directly interpretable.
The instrument accepts up to 4 standard 350 Ohms load cells. The
instrument provides 5 Vdc excitation voltage. For load cells with different
impedance, calculate the current consumption for each cell, and the
total must not exceed the maximum current the instrument can provide
(see section 11).
In case of problems with the signal provided by the load cell, the
instrument provides information for troubleshooting purposes. Congure
the ‘messages’ function (see section 13.8) to access the actual values
for the input signal (expressed in mV), the excitation voltage measured
at the ‘sense’ terminals (expressed in Vdc) and the current provided to
the cell (expressed in mA). The operator can use these values to identify
the cause of the problem. See section 6 for more information on how to
access these values in real time.
The instrument is designed to measure load cell signals. The instrument
provides 5 Vdc excitation voltage to power the load cell, and reads the
millivolt signal generated by the load cell. The instrument also reads the
actual excitation voltage connected to the load cell, and compensates
the read signal for changes at the excitation voltage.
The actual value of the excitation voltage is detected by using the
‘sense’ wires. Connect the ‘sense +’ and ‘sense -’ (terminals 5 and 2) to
the load cell, to provide the instrument with an accurate value of the
excitation voltage received by the cell. Deviations and errors from the
standard excitation value (5 Vdc) are automatically compensated by the
instrument, increasing the accuracy and reliability of the measure.
If you can not connect the ‘sense’ wires to the load cell, place a
shortcircuit between terminals ‘sense +’ and ‘Vexc +’ (terminals 5 and 4),
and between terminals ‘sense -’ and ‘Vexc -’ (terminals 2 and 1).
For applications with multiple load cells (2, 3 or 4 cells) connect the
‘sense ’ wires to the ‘electrical middle point’ of the power wires of all the
cells (see section 7.8).
The ‘sense’ terminals must be always connected. If you do not
use the ‘sense’ wires, shortcircuit with ‘Vexc’ terminals
Table 2 | Typical load cell connection
Vexc +
signal - signal +
sense -
Vexc -
sense +
123 456
I4L terminals
The instrument can be congured to measure millivolts in differential
mode. Activating any millivolt measurement mode, disables de
excitation voltage and disables the ‘sense’ compensation for changes
at the excitation voltage. The instrument works as a pure differential
millivolt signal converter.
7. Practical load cell information
Table 3 | Millivolt mode connection
mV - mV +
123 456I4L terminals
7.1 Number and type of cells accepted
7.2 Load cell and ‘sense’ wires
7.3 Millivolt mode
7.4 Load cell with external power
Measuring with load cells requires an electrically clean installation.
When connecting the ground to the cell system, assure that the load
cell connection to ground is performed in such a way that the current to
ground does not ow through the cell.
7.5 Connecting the cell to the ground
Table 4 | Load cell connection with external power
signal - signal +
sense -
sense +
123 456
Vexc -
Vexc +
I4L terminals

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
www.fema.es 5
A ‘junction box’ is a connections box where several load cells can be
connected. The ‘junction box’ then offers a single set of output terminals,
that will be connected to the instrument.
The ‘junction box’ provides 4 or 6 terminals, like a normal load cell: two
terminals for millivolt signal, two terminals for excitation voltage, and
eventually two additional terminals for ‘sense’ wires. If ‘sense’ terminals
are not present, you can connect the ‘sense’ wires to the excitation
voltage terminals of the ‘junction box’ or directly to the ‘electrical middle
point’ of the power wires of the load cells. Last option is to short circuit
the ‘sense’ terminals to the excitation voltage terminals as indicated at
section 7.2.
If the ‘junction box’ provides an output signal that is the addition of
each of the millivolt load cell signals, congure the instrument for the
appropriate input signal range.
Example : four load cell signals of 2 mV/V, powered at 5 Vdc, each load cell
provides a maximum of 10 mV signal. The output of the ‘junction box‘ will
be 40 mV maximum, so select the 0/40 mV input signal range.
If the ‘junction box’ provides the mean value of the four load cell signals,
then the input signal range must be selected to 0/10 mV.
7.6 Connections with a junction box
Table 5 | Connections with a junction box
I4L terminals
Junction box
(connections box)
signal +
signal - Vexc +
sense -
Vexc - sense +
123 456
Using 3 load cells is the optimal way to distribute the weight on a plane,
although it is common to work with 4 load cells in applications with
tanks, hoppers and similar.
When working with multiple load cells, the optimal connection is the
one that makes the wires of the load cell converge in the same central
area, so that all the cells are at the same ‘electrical distance’ from the
instrument.
Use the same type load cell and connect the wires to the central area as
indicated below. Congure the instrument as indicated in this manual,
assuming that :
• the nominal weight of the system is the addition of the nominal
weight of each cell (3 x 100 Kg = 300 Kg for 3 cells, or 4 x 100 Kg = 400 Kg
for 4 cells)
• the ‘sense’ wires are carried to the central area together with the Vexc
wires, but are not propagated to each individual cell. If you do not want
to use the ‘sense’ wires, see section 7.2.
Table 6 | Direct connection to 3 load cells
Signal+
Vexc+
Signal-
Sense-
Vexc-
Sense+
123 456
I4L terminals
Table 7 | Direct connection to 4 load cells
Signal+
Vexc+
Signal-
Sense-
Vexc-
Sense+
123 456
I4L terminals
7. Practical information (cont.)
7.7 How to calculate the input signal range
The input signal range selected at the instrument must be able
to accept the whole range of signal that the load cell can provide.
This value is obtained by multiplying the sensitivity of the load cell
(expressed in mV/V) with the excitation voltage value, which is 5 Vdc
for this instrument.
• Load cell sensitivity = 2 mV/V
• Excitation voltage = 5 Vdc
• Maximum signal = 2 mV/V x 5 Vdc = 10 mV
• Select ‘Input signal range’ = 0/10 mV
• Code 011 for 4/20 mA output or code 110 for 0/10 Vdc output
7.8 Connections with 3 or 4 load cells

FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
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Table 8 | Predened conguration codes for load cells - Input / Output
Input signal
range
Type of signal Output 4/20 mA
Code
Output 0/10 Vdc
Code
See section
...
0/5 mVdc load cell
signal
010 110
10.1
0/10 mVdc 011 111
0/15 mVdc 012 112
0/20 mVdc 013 113
0/25 mVdc 014 114
0/30 mVdc 015 115
0/40 mVdc 016 116
0/50 mVdc 017 117
0/60 mVdc 018 118
0/70 mVdc 019 119
0/80 mVdc 020 120
±5 mVdc 021 121
±10 mVdc 022 122
±20 mVdc 023 123
±30 mVdc 024 124
±40 mVdc 025 125
±50 mVdc 026 126
±60 mVdc 027 127
±70 mVdc 028 128
±80 mVdc 029 129
Reserved 030 to 049 130 to 149
8. Predened conguration codes
Select the desired code for your application, and check the following
sections for more information:
• for information on how to activate a code, see section 13.1
• to customize the input and output signals, see section 13.4
Notes
• Code ‘uSEr’ indicates that a user custom conguration is active, and it does not
match any of the listed codes This code is non-selectable, for information only.
Example: select code ‘013’ for 0/20 mVdc=4/20 mA, the instrument reads code
‘013’. Later, congure the input to 0/17 mVdc=4/20 mA, this does not match a listed
code, and the instrument reads ‘uSEr’. Or change the output to 0/20 mVdc=1/5 Vdc,
this does not match a listed code, and the instrument reads ‘uSEr’.
• Code ‘----’ identies the end of the list, it follows code ‘199’ and the list
continues with code ‘010’. Select ‘----’ to exit the list without applying changes.
To calculate the optimal input signal range for your load cell,
see section 7.7.
The instrument can be congured to measure millivolt in differential
mode. Activating the millivolt mode disables de excitation voltage and
disables the ‘sense’ compensation for changes at the excitation voltage.
The instrument works as a pure differential millivolt signal converter.
Select the ‘Predened conguration code’ according to your maximum
millivolt signal (see Table 9).
The instrument accepts up to 4 standard 350 Ohms load cells. The
instrument provides 5 Vdc excitation voltage. Calculate the maximum
output signal generated by your load cell, and select the ‘Predened
conguration code’ accordingly (see Table 8).
Table 9 | Predened conguration codes for millivolt signals - Input / Output
Input signal
range
Type of signal Output 4/20 mA
Code
Output 0/10 Vdc
Code
See section
...
0/5 mVdc millivolt
signal
050 150
10.2
0/10 mVdc 051 151
0/15 mVdc 052 152
0/20 mVdc 053 153
0/25 mVdc 054 154
0/30 mVdc 055 155
0/40 mVdc 056 156
0/50 mVdc 057 157
0/60 mVdc 058 158
0/70 mVdc 059 159
0/80 mVdc 060 160
±5 mVdc 061 161
±10 mVdc 062 162
±20 mVdc 063 163
±30 mVdc 064 164
±40 mVdc 065 165
±50 mVdc 066 166
±60 mVdc 067 167
±70 mVdc 068 168
±80 mVdc 069 169
Reserved 070 to 099 170 to 199
(End of list) ‘----’ (see notes below)
(Custom selection) ‘uSEr’ (see notes below)

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
www.fema.es 7
9. Connections and dimensions (mm (inch))
Table 10 | INPUT signal connections
INPUT
signal
Input terminals Section
...
123456
load cell Vexc - sense - signal - Vexc + sense + signal + 10.1
millivolts mV - mV + 10.2
Table 11 | OUTPUT signal connections
OUTPUT
signal
Output terminals Connections
789
4/20 mA
active output
mA-
(in)
mA+
(out)
789
mA+
mA-
4/20 mA
passive output*
(*external loop
power needed)
mA+
(out)
mA-
(in)
789
mA+
mA-
0/10 Vdc common +Vdc
789
common
+Vdc
fuse
signal -
sense -
Vexc -
POWER (ABC)
18 to 265 Vac/dc isolated
OUTPUT SIGNAL (789)
sense +
common (0 Vdc or passive mA current out)
signal 4/20 mA (mA current in)
signal 0/10 Vdc (or active mA current out)
Standard (35 mm) DIN
rail mount
1 2 3
106 mm
(4.17’’)
108 mm
(4.25’’)
INPUT SIGNAL (123 456)
~ +
~ -
A B C
4 5 6
7 8 9
22.5 mm
(0.89’’)
Vexc +
signal +
see ‘Table 10’
see ‘Table 11’
Fuse - This instrument does not
include internal protection fuse.
According to security regulation
EN 61010-1, add a protection fuse to
the power line to act as a disconnection
element, easily accessible to the operator
and identied as a protection device. Use
time-lag fuse, with value :
• 250 mA for voltages > 50 Vac/dc
• 400 mA for voltages < 50 Vac/dc

FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
8
10. Input signals
10.1 Load cell signals
Table 12 | Connection example for load cell signals
123
Vexc -
mV -
sense -
456
Vexc +
mV +
sense +
MEASURING LOAD CELL SIGNALS
The instrument can be congured to measure load cell
signals, with pre-congured ranges from 0/5 mV up to
0/80 mV. The instrument provides excitation voltage of
+5 Vdc to power the load cell, with a maximum of 70 mA
(this is 4 standard load cells of 350 Ohms). Bipolar ranges from ±5 mV
up to ±80 mV can also be congured.
‘SENSE’ FUNCTION
The instrument reads the actual excitation voltage received by the load
cell, and compensates the signal read for any variations of the excitation
voltage. The applied voltage is read through the ‘sense’ wires and the
‘sense’ wires must be connected to the load cell. If it is not possible to
connect the ‘sense’ wires to the load cell, apply a shortcircuit between
terminals ‘sense +’ and ‘Vexc +’ (terminals 5 and 4), and between terminals
‘sense -’ and ‘Vexc -’ (terminals 2 and 1). (see section 7.2).
PREDEFINED CONFIGURATION CODES
See ‘Table 13’ for a list of predened input-output conguration codes.
To activate a code see section 13.1.
CUSTOMIZED SIGNAL RANGES
To customize the input and / or output signal ranges, access the
‘Advanced scaling’ menu (see section 13.4).
MAXIMUM OVERSIGNAL AND PROTECTIONS
‘Maximum oversignal’ is the maximum signal accepted by the instrument.
Higher signal values may damage the instrument. Lower signal values
are non destructive but may be out of accuracy specications. Do not
connect active signals to the excitation voltage terminals.
OUTPUT SIGNAL
The output signal is congurable to 4/20 mA (active and passive) and
0/10 Vdc.
Table 13 | Input signal ranges for load cell signals
Input
range
Code for
4/20 mA output
Code for
0/10 Vdc output
Accuracy
(% FS)
Max.
oversignal Zin
0/5 mV 010 110 <0.15 % ±12 Vdc 20 MOhm
0/10 mV 011 111 <0.10 % ±12 Vdc 20 MOhm
0/15 mV 012 112 <0.10 % ±12 Vdc 20 MOhm
0/20 mV 013 113 <0.10 % ±12 Vdc 20 MOhm
0/25 mV 014 114 <0.10 % ±12 Vdc 20 MOhm
0/30 mV 015 115 <0.10 % ±12 Vdc 20 MOhm
0/40 mV 016 116 <0.10 % ±12 Vdc 20 MOhm
0/50 mV 017 117 <0.07 % ±12 Vdc 20 MOhm
0/60 mV 018 118 <0.07 % ±12 Vdc 20 MOhm
0/70 mV 019 119 <0.07 % ±12 Vdc 20 MOhm
0/80 mV 020 120 <0.07 % ±12 Vdc 20 MOhm
±5 mV 021 121 <0.15 % ±12 Vdc 20 MOhm
±10 mV 022 122 <0.10 % ±12 Vdc 20 MOhm
±20 mV 023 123 <0.10 % ±12 Vdc 20 MOhm
±30 mV 024 124 <0.10 % ±12 Vdc 20 MOhm
±40 mV 025 125 <0.10 % ±12 Vdc 20 MOhm
±50 mV 026 126 <0.07 % ±12 Vdc 20 MOhm
±60 mV 027 127 <0.07 % ±12 Vdc 20 MOhm
±70 mV 028 128 <0.07 % ±12 Vdc 20 MOhm
±80 mV 029 129 <0.07 % ±12 Vdc 20 MOhm
Load cell
CORRECTED MILLIVOLT SIGNAL
Throughout this document, the ‘Input signal low’ (In.Lo), ‘Input signal high’ (In.hI) and ‘Tare’ (tArE) parameters and the ‘Input signal value’
(InP.S), are expressed in ‘corrected millivolt’ units, and are indicated with a ( ’ ) symbol. The millivolt values of these parameters may not be the same
as the millivolt values directly measured at the input signal terminals. The parameter values are corrected to a theoretical excitation voltage scale
of ‘5 Vdc’. The instrument reads the real value of the excitation voltage at the load cell, and compensates for any variations away from the ‘5 Vdc’
theoretical value.
For troubleshooting purposes, the ‘Measure’ function displays the real millivolt signal at terminals (see section 13.5). This value can be compared
with the value provided by a handheld millivolt meter connected at the input terminals.

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
www.fema.es 9
10.2 Millivolts signals
MEASURING MILLIVOLT SIGNALS
The instrument can be congured to measure millivolt
signals from any source, with pre-congured ranges from
0/5 mV up to 80 mV. See connections at ‘Table 14’. Bipolar
ranges from ±5 mV up to ±80 mV can also be congured.
PREDEFINED CONFIGURATION CODES
See ‘Table 15’ for a list of predened input-output conguration codes.
To activate a code see section 13.1.
CUSTOMIZED SIGNAL RANGES
To customize the input and / or output signal ranges, access the
‘Advanced scaling’ menu (see section 13.4).
MAXIMUM OVERSIGNAL AND PROTECTIONS
‘Maximum oversignal’ is the maximum signal accepted by the instrument.
Higher signal values may damage the instrument. Lower signal values
are non destructive but may be out of accuracy specications.
OUTPUT SIGNAL
The output signal is congurable to 4/20 mA (active and passive) and
0/10 Vdc.
Table 14 | Connection examples for millivolt signals
123
not connected
mV -
not connected
456
not connected
mV +
not connected
Table 15 | Input signal ranges for millivolt signals
Input
range
Code for
4/20 mA output
Code for
0/10 Vdc output
Accuracy
(% FS)
Max.
oversignal Zin
0/5 mV 050 150 <0.10 % ±12 Vdc 10 MOhm
0/10 mV 051 151 <0.07 % ±12 Vdc 10 MOhm
0/15 mV 052 152 <0.07 % ±12 Vdc 10 MOhm
0/20 mV 053 153 <0.07 % ±12 Vdc 10 MOhm
0/25 mV 054 154 <0.07 % ±12 Vdc 10 MOhm
0/30 mV 055 155 <0.07 % ±12 Vdc 10 MOhm
0/40 mV 056 156 <0.05 % ±12 Vdc 10 MOhm
0/50 mV 057 157 <0.05 % ±12 Vdc 10 MOhm
0/60 mV 058 158 <0.05 % ±12 Vdc 10 MOhm
0/70 mV 059 159 <0.05 % ±12 Vdc 10 MOhm
0/80 mV 060 160 <0.05 % ±12 Vdc 10 MOhm
±5 mV 061 161 <0.10 % ±12 Vdc 10 MOhm
±10 mV 062 162 <0.07 % ±12 Vdc 10 MOhm
±20 mV 063 163 <0.07 % ±12 Vdc 10 MOhm
±30 mV 064 164 <0.07 % ±12 Vdc 10 MOhm
±40 mV 065 165 <0.05 % ±12 Vdc 10 MOhm
±50 mV 066 166 <0.05 % ±12 Vdc 10 MOhm
±60 mV 067 167 <0.05 % ±12 Vdc 10 MOhm
±70 mV 068 168 <0.05 % ±12 Vdc 10 MOhm
±80 mV 069 169 <0.05 % ±12 Vdc 10 MOhm
10. Input signals (cont.)
mV
+
-

FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
10
11. Technical specications
INPUT SIGNAL RANGES FOR LOAD CELLS
signal ranges from 0/5 mV up to 0/80 mV (see section 10.1)
bipolar signal ranges from ±5 mV up to ±80 mV (see section 13.4)
excitation voltage +5 Vdc
excitation voltage variations automatic compensation (see section 7.2)
excitation current max. 70 mA
INPUT SIGNAL RANGES FOR MILLIVOLTS
signal ranges from 0/5 mV up to 0/80 mV (see section 10.2)
bipolar signal ranges from ±5 mV up to ±80 mV (see section 13.4)
excitation voltage no
input impedance 10 MOhm typical (with 1 MOhms during
150 milliseconds,
every 10 seconds approx.)
ACCURACY AT 25 ºC see for each type of signal at section 10
*accuracy values are indicated for 4/20 mA
output. For 0/10 Vdc output, add +0.05 % to
indicated accuracy values
THERMAL DRIFT
± 150 ppm/ºC (F.S.) for ranges up to 5 mV
± 100 ppm/ºC (F.S.) for ranges up to 20 mV
± 75 ppm/ºC (F.S.) for ranges up to 80 mV
STEP RESPONSE
Response time according to the congured parameter ‘power lter’ (see section
13.9). Typical response times to reach 99% of the output signal, in response to a
100% step at the input.
with ‘no lter’<115 mSec. typ. (
0 to 99% )
with
‘50 Hz lter’ or ‘60 Hz lter’ <150 mSec. typ. ( 0 to 99% )
with ‘50 and 60 Hz lter’<300 mSec. typ. (
0 to 99% )
OUTPUT SIGNAL RANGES
active current output 4/20 mA active
max. <22 mA, min. 0 mA
maximum load <400 Ohm
passive current output 4/20 mA passive
max. 30 Vdc on terminals
voltage output 0/10 Vdc,
max. <11 Vdc, min. -0.05 Vdc (typ.)
minimum load > 10 KOhm
CONFIGURATION SYSTEM
key pad + display accessible at the front of the instrument
conguration ‘conguration menu’ and ‘predened codes’
scalable units scalable input ranges
scalable output ranges
scalable process display
POWER SUPPLY
voltage range 18 to 265 Vac/dc isolated
(20 to 240 Vac/dc ±10%)
AC frequency 45 to 65 Hz
consumption <3.0 W
power wires 1 mm2 to 2.5 mm2(AWG17 to AWG14)
overvoltage category 2
ISOLATION
input - output 3000 Veff (60 seconds)
power - input 3000 Veff (60 seconds)
power - output 3000 Veff (60 seconds)
ENVIRONMENTAL
IP protection IP30
impact protection IK06
operation temperature from 0 to +50 ºC
storage temperature from -20 to +70 ºC
‘warm-up’ time 15 minutes
humidity 0 to 95% non condensing
altitude up to 2000 meters
MECHANICAL
size 106 x 108 x 22.5 mm
mounting standard DIN rail (35 x 7.5 mm)
connections
plug-in screw terminal (pitch 5.08 mm)
housing material polyamide V0
weight <150 grams
packaging 120 x 115 x 30 mm, cardboard

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
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FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
12
12. How to operate the instrument
The instrument is fully congurable from the 3 push button keypad and
the 4 red digit led display at the front of the instrument (see Table 16).
AT POWER-UP
When the power supply is connected, the instrument applies the
following sequence :
• the ‘display’ shows the rmware code ‘b3.xx’.
• the ‘display’ shows the congured ‘units’ and ‘input range’ (for
example: ‘Lc’ and ‘15’ for 0/15 mV in load cell mode, or ‘MV’ and ‘b15’
for ±15 mV in millivolt mode).
• the instrument is now in ‘normal mode’ of operation and the ‘display’
shows the ‘information’ congured at section 13.5.
FROM ‘NORMAL MODE’ OF OPERATION
From ‘normal mode’ of operation, the operator can access the following
functions:
• key ‘SQ’ (<) gives access to the ‘conguration menu’ (see section 12.3).
• key ‘UP’ (5) gives access to the ‘force’ menu (see section 12.4).
• key ‘LE’ (5) activates the ‘messages’ function (see section 12.5).
‘ECO’ FUNCTION (‘DISPLAY’ POWERED OFF)
The ‘Eco’ function powers off the display under the following conditions:
• the instrument is in ‘normal mode’ of operation.
• and there is no interaction from the operator for 60 seconds.
The decimal point remains active (ashing), indicating that the
instrument is working correctly. This is a congurable function, enabled
by default. To congure the ‘Eco’ function, see section 13.9.
12.1 Conguration system
12.2 ‘Normal mode’ of operation
HOW TO ENTER THE ‘CONFIGURATION MENU’
With the instrument in ‘normal mode’ of operation (see section 12.2),
press the ‘SQ’ (<) key and maintain for 1 second. The horizontal leds
light from bottom to top. When the upper led lights, the instrument
enters into the ‘conguration menu’.
When entering the ‘conguration menu’, the rst menu entry ‘Function
code’ (codE) is displayed. See section 14 for a full view of the
‘conguration menu’.
If the ‘SQ’ (<) key is released before entering into the
‘conguration menu’, the horizontal leds light downwards from
top to bottom, and the instrument returns to ‘normal mode’ of
operation.
HOW TO OPERATE INSIDE THE ‘CONFIGURATION MENU’
Inside the ‘conguration menu’, use the front keypad to move through
menu entries, parameters, and select conguration values:
•Key ‘SQ’ (<) functions as the ‘ENTER’ key. It selects the menu entry
currently displayed. At numerical value entries, it validates the number
displayed.
•Key ‘UP’ (5) moves vertically through the different menu entries. At
numerical value entries, it modies the selected digit by increasing its
value to 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
•Key ‘LE’ (3) functions as the ‘ESCAPE’ key. It leaves the selected
menu entry, and eventually, will leave the ‘conguration menu’.
When leaving the ‘conguration menu’, the changed parameters are
activated. At numerical value entries, the ‘LE’ (3) key allows to select
the active digit. To modify a numeric value press the ‘UP’ (5) key to
increase the value ‘+1’. Press the ‘SQ’ (<) key to validate the value.
WHEN EXITING THE ‘CONFIGURATION MENU’
When exiting the ‘conguration menu’ without changes (either by
‘rollback’ activation or because there are no changes in the conguration),
the horizontal leds light down from top to bottom, and the instrument
returns to ‘normal mode’ of operation.
When exiting the ‘conguration menu’ with changes, the display leds light
a round shape while the new conguration is stored. When the round
shape is nished, a start-up is applied (see section 12.2). After start-up,
the new conguration is active and the instrument is in ‘normal mode’ of
operation.
‘ROLLBACK’ FUNCTION
If there is no interaction from the operator for 60 seconds, the instrument
exits the ‘conguration menu’ discarding changes, and returns to ‘normal
mode’ of operation.
12.3 How to operate the ‘Conguration menu’
Table 16 | CONFIGURATION SYSTEM
Key ‘SQ’ (<)
Display
Key ‘UP’ (5)
Key ‘LE’ (3)
Table 17 | ‘ECO’ DECIMAL POINT
Flashing
When the operator is inside the ‘conguration menu’, the output
signal will remain overranged at maximum signal. Additional
congurations are available at the ‘On SQ’ parameter (see
section 13.9).
When the operator exits the ‘conguration menu’, the output
signal is temporarily set to minimum value for a time
<5 seconds, while the instrument restarts.

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
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HOW TO ENTER THE ‘FORCE’ MENU
With the instrument in ‘normal mode’ of operation (see section 12.2), press
and hold the ‘UP’ (5) key for 1 second. The horizontal leds light from bottom
to top. When the upper led lights, the instrument enters into the ‘force’ menu.
If the ‘UP’ (5) key is released before entering into the ‘force’ menu, the
horizontal leds light downwards from top to bottom, and the instrument
returns to ‘normal mode’ of operation.
HOW TO OPERATE INSIDE THE ‘FORCE’ MENU
The available functions inside the ‘force’ menu can be congured (see
section 13.7). By default, ‘Force High’, ‘Force Low’, ‘Force Set’ and ‘Tare’ are
available. Inside the ‘force’ menu:
•press the ‘UP’ (5) key to move to the next function.
•press the ‘SQ’ (<) key to activate the selected function.
When the function is active, the display will remain ashing. Press the ‘SQ’
(<) key to deactivate the function (display stops ashing), or wait for the
rollback to activate.
DESCRIPTION OF ‘FORCE’ FUNCTIONS
The ‘force’ functions allow to manually force the output signal to the low
and high levels of the output signal selected. These functions allow to
easily validate the correct function of remote elements connected to the
instrument output, such as PLC, HMI’s, SCADAs, etc.
The ‘force low’ function sets the output signal to the minimum value of the
selected range (4 mA or 0 Vdc or the value congured at the ‘output_low’
parameter).
The ‘force high’ function sets the output signal to the maximum value of the
selected range (20 mA or 10 Vdc or the value congured at the ‘output_high’
parameter).
The ‘force set’ function sets the output signal to a value between 0 and 100%
of the maximum selected range (4 to 20 mA or 0 to 10 Vdc or the range
congured at the ‘output_low’ and ‘output_high’ parameters). When entering
the ‘force set’ function, the display reads ‘50’ (the output is forced to 50% of
the congured range). Use keys ‘UP’ (5) and ‘LE’ (3) to move up to 100% or
down to 0% of the congured range.
12.4 How to operate the ‘Force’ menu
HOW TO ACTIVATE ‘MESSAGES’ FUNCTION
With the instrument in ‘normal mode’ of operation (see section
12.2), press the ‘LE’ (3) key to activate the ‘messages’ function. The
‘messages’ function displays information about the instrument status.
The information available is congurable (see section 13.8).
The ‘messages’ function ends when all the information has been
displayed or front keys ‘UP’ (5) or ‘SQ’ (<) are pressed. The ‘display’
returns to ‘normal mode’ of operation.
12.5 How to activate the ‘Messages’ function
12. How to operate the instrument (cont.)
Table 18 | Example of ‘Force’ menu with all functions set to ‘on’
‘Force Low’
‘Force high’
Exit
Force Set
Tare Tare value in mV
See section 13.7 for a list and a description of available functions. FAST CONFIGURATION
The fastest way to congure the instrument is to activate one of the
predened conguration codes (see section 8).
Access the ‘conguration menu’ and enter the ‘Function code’ (codE)
menu entry. The code displayed is the current active input - output range.
Select the new code and validate. Selecting a code automatically exits
the ‘conguration menu’ and activates the new conguration.
*There are different codes for 4/20 mA and 0/10 Vdc output
signals.
To customize the input and output signals, see the ‘Advanced scaling’
section of the ‘conguration menu’ (see section 13.4).
ADVANCED CONFIGURATION
Additional conguration parameters are available at the ‘conguration
menu’. The operator can customize the input and output signal ranges,
the messages seen on display, the functions available at the ‘force’ menu,
the messages associated to the ‘LE’ (3) key, activate lters, password
function, etc.
See section 13 for a detailed explanation on the ‘conguration menu’.
12.6 Fast and advanced congurations
DESCRIPTION OF ‘TARE’ FUNCTION
The ‘tare’ function allows to view the actual value of the tare and manually
apply a tare. Press the ‘SQ’ (<) key to enter the ‘tare’ function, and access
the actual tare value expressed in millivolts’ (see section 10.1) with 2 decimal
points. Press again the ‘SQ’ (<) key to apply a new tare. The instrument
will show ‘ok’ while the new tare is applied, and will return back to indicate
the new tare value applied. Tare value can also be accessed and manually
modied at the ‘conguration menu’ (see section 13.4).
HOW TO EXIT ‘FORCE’ MENU
To exit the ‘force’ menu, press the ‘LE’ (3) key, or press the key ‘UP’ (5) key
until the parameter ‘----’ appears, and select by pressing the ‘SQ’ (<) key, or
wait without pressing any key until the automatic ‘rollback’ activates.
When exiting the ‘force’ menu, the horizontal leds light down from top to
bottom, and the instrument returns to ‘normal mode’ of operation.
‘ROLLBACK’ FUNCTION
If there is no interaction from the operator for 60 seconds, the instrument
exits the ‘force’ menu and returns to ‘normal mode’ of operation.

FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
14
13. Conguration menu
13.1 Function codes
The fastest way to congure the instrument, is to select a predened
conguration code (see section 8). At the ‘Conguration code’ (codE)
parameter use keys ‘UP’ (5) and ‘LE’ (3) to move up and down
through the list of codes. Locate the desired code, and press ‘SQ’ (<).
The instrument shows the ‘codE’ parameter. Press ‘LE’ (3) to exit the
‘conguration menu’. The instrument stores the new conguration,
applies a ‘power-up’ routine and returns to the ‘normal mode’ of operation
(see section 12.2).
Selecting a ‘reserved’ code or ‘----’ returns to the previous menu without
changes.
When entering the ‘Function code’ (codE) parameter, the active
‘conguration code’ is displayed. If the actual conguration does not
match any of the conguration codes, code ‘uSEr’ is displayed.
There are different codes for 4/20 mA output (codes from 010 to 099)
and 0/10 Vdc output (codes from 110 to 199) (see section 8).
Custom input and output signal ranges can be congured at the
‘Advanced scaling’ section of the ‘conguration menu’ (see section 13.4).
Conguration code
Enter the code (see Table 8)
13.2 Initial conguration
At the ‘Input conguration’ (InP) menu entry, congure the reading
mode and the input signal range.
If you have already selected a conguration code (see section
13.1), the input signal has been already selected and there is
no need to manually select the ‘Mode’ (ModE) or ‘Signal range’
(rAnG) parameters again.
At the ‘Mode’ (ModE) parameter select ‘cELL’for load cell measurement,
or select ‘MV’ for millivolt measurement. See section 7.2 and 7.3 for an
explanation of the differences between both modes.
At the ‘Signal range’ (rAnG) parameter select the input signal range.
Input signal ranges can also be congured by selecting a pre-dened
conguration code (see section 13.1).
For an example on how to calculate the appropriate input signal range
for a given load cell, see section 7.7.
To customize to an intermediate range (for example 0/7.5 mV) see
section 13.4. To manually select the output signal see section 13.3.
At the ‘Excitation voltage’ (V.EXc) parameter select ‘oFF’ to disable the
excitation voltage. Excitation voltage is set to ‘on’ when selecting the
‘cELL’ mode, and set to ‘oFF’ when selecting the ‘MV’ mode at the ‘Mode’
(ModE) parameter.
13.3 Output range
At the ‘Output range’ (out) menu entry, select the output signal range to
4/20 mA (value ‘420’) or to 0/10 Vdc (value ‘010’).
The output signal range selected can be later customized to operate in a
reduced range of signal (see section 13.4).
Output range
Input conf. Mode
Load cell mode
Millivolt mode
Signal range
0/5 mV
0/10 mV
0/15 mV
0/20 mV
0/25 mV
0/30 mV
0/40 mV
Excitation voltage
Excitation voltage
0/50 mV
0/60 mV
0/70 mV
0/80 mV
±10 mV
±20 mV
±30 mV
±40 mV
±50 mV
±60 mV
±70 mV
±80 mV
±5 mV

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
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13. Conguration menu (cont.)
Input signal low (in mV’)
Input signal high (in mV’)
Output signal low
Output signal high
Process low
Process high
Process decimal point
At the ‘Advanced scaling’ (Ad.Sc) menu, customize the actual value for
the tare, the input and output signal ranges and, if used, the process
value. When selecting a predened conguration code, the parameters
are congured according to the code selected. The parameters are
accessible for manual conguration:
•at ‘Tare’ (tArE) view the actual value of the tare parameter, expressed
in ‘x.xx’ mV’ (see section 10.1). To reset the tare value manually set this
parameter to ‘0.00’. Selecting a new ‘conguration code’ (see section
13.1) or a new ‘signal range’ (see section 13.2) also restes the ‘tare’
value to zero.
•at the ‘Input low signal’ (In.Lo) parameter congure the low input
signal value. This value is expressed in ‘x.xx’ mV’ (see section 10.1).
The parameter value is not affected by changes at the tare value.
•at the ‘Input high signal’ (In.hI) parameter congure the high input
signal value. This value is expressed in ‘x.xx’ mV’ (see section 10.1).
The parameter value is not affected by changes at the tare value.
•at the ‘Output low signal’ (ou.Lo) parameter congure the low output
signal value. This value is expressed in ‘x.xx’ mA or in ‘x.xx’ Vdc.
•at the ‘Output high signal’ (ou.hI) parameter congure the high
output signal value. This value is expressed in ‘x.xx’ mA or in ‘x.xx’ Vdc.
These four parameters dene the relation between the input and the
output signal (see Table 19) and can be modied independently, to match
the specic input-output relation for your application (see Table 20).
Additionally, a process value can be scaled using the last three
parameters of the ‘Advanced Scaling’ (Ad.Sc) menu. The actual process
value can be accessed through the ‘display information’ function (see
section 13.5) or the ‘messages’ function (see section 13.8).
•at the ‘Process low’ (Pr.Lo) parameter, congure the process value
associated to the low input signal value.
•at the ‘Process high’ (Pr.hI) parameter, congure the process value
associated to the high input signal value.
•at the ‘Process decimal point’ (Pr.dP) parameter, congure the
decimal point position for the process value.
Advanced scaling
13.4 Advanced scaling
Table 19 | EXAMPLE FOR CODE ‘011’ (0/10 mV=4/20 mA)
Output
4 mA
Input
0 mV’ 10 mV’
20 mA
Selecting the predened code ‘011’ congures a range of 0/10 mV’=4/20 mA, and
the values congured are as indicated below:
input_low = 0.00 mV’ output_low = 4.00 mA
input_high = 10.00 mV’ output_high = 20.00 mA
Table 20 | EXAMPLE FOR CUSTOM RANGE (-8/+8 mV=1/9 Vdc)
Input-8 mV’ +8 mV’
Output
1 Vdc
9 Vdc
To congure -8/+8 mV’=1/9 Vdc, select code 122 (-10/+10 mV’=0/10 Vdc) and
then congure the parameters below:
input_low = -8.00 mV’ output_low = 1.00 Vdc
input_high = 8.00 mV’ output_high = 9.00 Vdc
Tare value (in mV’)

FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
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13. Conguration menu (cont.)
At the ‘Display information’ (dISP) menu select one parameter to read
on display when the instrument is in ‘normal mode’ of operation. If you
need access to more than one information, see the ‘messages’ function
(see section 13.8) associated to front key ‘LE’ (3).
• select ‘Measure’ (MEAS) to read the value of the actual millivolts at
signal terminals (for example: ‘MEAS mV 7.82’). Value is expressed in
millivolts (see section 10.1).
•select ‘Tare’ (tArE) to read the actual value of the ‘tare’ parameter.
(for example : ‘tArE mV 1.27’) This value is expressed in corrected
millivolts (mV’) (see section 10.1).
•select ‘Input signal value’ (InP.S) to read the input signal value and
the measurement units (for example: ‘Inp mV 8.52’). This value is
expressed in millivolts (mV’) (see section 10.1).
•select ‘Output signal value’ (out.S) to read the output signal value
and the measurement units (for example : ‘Out mA 12.40’).
•select ‘Label’ (LAbL) to read the value congured at the ‘label’ and
‘label2’ parameters (see section 13.9).
•select ‘Process value’ (Proc) to read the process value as scaled at
the process parameters (see section 13.4) (for example: ‘Proc 150.0’).
• select ‘Percentage’ (Prct) to read the percentage of input signal,
where ‘0’ is the value assigned to the ‘input signal low’ parameter, and
‘100’ is the value assigned to the ‘input signal high’ parameter (see
section 13.4) (for example: ‘Prct 23.5’).
• select ‘Excitation voltage’ (EX.V) to read the value of the excitation
voltage received by the load cell. This value is read from the ‘sense’
terminals (see section 7.2) (for example : ‘ExV 4.97’).
• select ‘Excitation current’ (EX.MA) to read the value of the current
provided through the excitation voltage terminals (for example: ‘ExMA 14.3’).
Display
information
Input signal value (in mV’)
Output signal value
Label
Signal percentage
Process value
Excitation voltage (in Vdc)
Excitation current (in mA)
Tare value (in mV’)
Field
correction
Field correction
low
Field correction
low
At the ‘Field correction’ (F.cor) menu, there is access to the ‘eld
correction’ functions. The ‘eld correction’ functions allow to modify
the ‘input signal low’ and ‘input signal high’ parameters of the ‘Advanced
scaling’ menu (see section 13.4), based on the actual input signal
measured at the input. Functions used to correct and ne tune the
slope of the load cell, by loading low and high weights and applying the
correction low and high. Tares can are applied after the correction.
•select the ‘Field correction low’ (Fc.Lo) function to set the actual
input signal value at the ‘input signal low’ parameter of the ‘Advanced
scaling’ menu. While measuring the value, the message ‘ok’ remains
ashing for 5 seconds. When the measure is completed, the instrument
returns to the ‘Field correction low’ (Fc.Lo) parameter.
•select the ‘Field correction high’ (Fc.hI) function to set the actual
input signal value at the ‘input signal high’ parameter of the ‘Advanced
scaling’ menu. While measuring the value, the message ‘ok’ remains
ashing for 5 seconds. When the measure is completed, the instrument
returns to the ‘Field correction high’ (Fc.hI) parameter.
‘ok’ message ashes while
the ‘eld correction’ function
is being applied and when
nished, the instrument
returns to previous menu
entry.
13.5 Field correction
Millivolts at signal terminals (in mV)
The ‘tare’ value is reset to ‘0’ when a ‘Field correction low’
(Fc.Lo) or ‘Field correction high’ (Fc.hI) is applied.
13.6 Display information

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
www.fema.es 17
13. Conguration menu (cont.)
Key ‘UP’
(‘force’ menu)
The key ‘UP’ (5) at the front of the instrument gives access to a
congurable list of functions (see section 12.4).
At the ‘Key UP (‘force’ menu)’ (K.uP) menu select which functions will
be available when pressing the front key ‘UP’ (5). Select ‘on’ to activate
the desired functions.
• congure ‘Force Low’ (F.Lo) to ‘on’ to activate the ‘Force low’ function
menu entry.
• congure ‘Force High’ (F.hI) to ‘on’ to activate the ‘Force high’ function
menu entry.
• congure ‘Force Set’ (F.SEt) to ‘on’ to activate the ‘Force set’ function
menu entry.
• congure ‘Tare’ (tArE) to ‘on’ to activate the ‘Tare’ function menu
entry.
The functions congured to ‘on’ are available at the ‘force’ menu. See
section 12.4 for a description on each function and how to operate them.
13.7 Key ‘UP’ (‘force’ menu)
Force low
Force high
Force set
Tare
The key ‘LE’ (3) at the front of the instrument gives access to a
congurable set of information messages.
At the ‘Key LE (messages function)’ (K.LE) menu, select the informations
to be displayed when the front key ‘LE’ (3) is pressed (see section 12.5).
Select ‘on’ to activate each information.
• congure ‘mV at terminals’ (MEAS) to ‘on’ to see the value in
millivolts at terminals (for example : ‘MEAS mV 13.82’).
• congure ‘Tare value’ (tArE) to ‘on’ to see the actual value of the ‘tare’
parameter. (for example : ‘tArE mV 1.27’) This value is expressed in
corrected millivolts (mV’) (see section 10.1).
• congure ‘Input signal value’ (InP.S) to ‘on’ to see the input signal
value and the measurement units (for example: ‘Inp mV 8.52’). This
value is expressed in millivolts (mV’) (see section 10.1).
• congure ‘Output signal value’ (out.S) to ‘on’ to see the output signal
value and the measurement units (for example : ‘Out mA 12.40’).
• congure ‘Label’ (LAbL) to ‘on’ to see the value congured at the
‘label’ and ‘label2’ parameters (see section 13.9).
• congure ‘Process value’ (Proc) to ‘on’ to see the process value as
scaled at the process parameters (see section 13.4) (for example:
‘Proc 150.0’).
• congure ‘Percentage’ (Prct) to ‘on’ to see the percentage of
input signal, where ‘0’ is the value assigned to the ‘input signal low’
parameter, and ‘100’ is the value assigned to the ‘input signal high’
parameter (see section 13.4) (for example: ‘Prct 23.5’).
• congure ‘Excitation voltage’ (EX.V) to ‘on’ to see the value of the
excitation voltage received by the load cell. This value is read from the
‘sense’ terminals (see section 7.2) (for example : ‘ExV 4.97’).
• congure ‘Excitation current’ (EX.MA) to ‘on’ the value of the current
provided through the excitation voltage terminals (for example: ‘ExMA
14.3’).
When more than one parameter is set to ‘on’, values will be displayed
sequentially, in the same order as they are listed in the menu, with
a middle dash ‘-’ between them. When all information has been
displayed, the instrument returns to ‘normal mode’ of operation.
13.8 Key ‘LE’ (‘messages’ function)
Key ‘LE’
(messages function)
Input signal value
(in mV’)
Output signal value
Process value
Label
Percentage
Excitation voltage
Excitation current
Tare value (in mV’)
mV at terminals

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13. Conguration menu (cont.)
The ‘Tools’ (tool) menu groups several functions.
•at the ‘Eco mode’ (Eco) parameter, dene the time to wait before the
display is powered off (while in ‘normal mode’ of operation). Default
value is 60 seconds. Congure ‘0’ to disable the function and maintain
the display always on.
•at the ‘SOS mode’ (SoS) parameter select ‘on’ to activate the output
signal to a predened value. Select the value from 0 to 100 % of the
active output range (4/20 mA or 0/10 Vdc). To deactivate the ‘SOS
mode’ select ‘oFF’. See section 5 for more information on the ‘SOS
mode’.
•at the ‘Label’ (LAbL) parameter, dene an alphanumerical value to
be displayed on the display, when the instrument is in ‘normal mode’
of operation, or at the ‘messages’ function when the key ‘LE’ (3) is
pressed. The label can be used to identify the instrument with its
own internal factory code. If more than four characters are needed,
congure the ‘Label 2’ (LbL.2) parameter. The total label value is
the characters at ‘label’ followed by the characters at ‘label2’. For
additional information and a list of available characters, see section 6.
•at the ‘On error’ (on.Er) parameter, congure the behavior of the
output signal, in case of error at the input signal (see section 16).
• select ‘Output to high’ (to.hI) to force the output signal to overrange
to maximum value
• select ‘Output to low’ (to.Lo) to force the output signal to
underrange to minimum value
• select ‘Standard output’ (Stdr) to overrange output signal to
maximum value in case of input signal overrange, and to underrange
output signal to minimum value in case of input signal underrange.
•at the ‘On ‘SQ’’ (on.Sq) parameter, congure the behavior of the
output signal when the operator is inside ‘conguration menu’ (see
section 12.3).
• select ‘Output to high’ (to.hI) to force the output signal to overrange
to maximum value (21.5 mA, 10.5 Vdc)
• select ‘Output to low’ (to.Lo) to force the output signal to
underrange to minimum value (0 mA, 0 Vdc)
• select ‘Hold output’ (hoLd) to hold the output signal while the
operator remains inside ‘conguration menu’.
•at the ‘Power lter’ (P.FLt) parameter, select a lter for specic power
frequency rejection. The lter selection has an effect on the response
times (see section 11).
• select ‘No lter’ (nonE) to disable frequency rejection lters. This
enables the fastest response time.
• select ‘50 Hz lter’ (50.hZ) to enable rejection to 50 Hz frequency.
• select ‘60 Hz lter’ (60.hZ) to enable rejection to 60 Hz frequency.
• select ‘50 and 60 Hz lter’ (both) to enable rejection to both 50 Hz
and 60 Hz frequencies. This is the slowest response time.
•at the ‘Average lter’ (AVr) parameter, congure the recursive lter
to be applied to measured input signal. The lter can be used to reduce
oscillations on noisy signals. Congure the lter strength between
‘0’ and ‘100’. The lter is stronger with higher values. Increasing the
strength of the lter slows the response speed of the instrument.
Value ‘0’ disables the lter.
13.9 ‘Tools’ menu
Average lter 0 to 100
‘Eco’ mode 5 to 255 seconds (0 disabled) (60 sec. default)
Tools
Label
Alphanumerical
Label 2
Alphanumerical
SOS mode % of output
Power lter
No lter
50 Hz lter
60 Hz lter
50 and 60 Hz lter
On ‘SQ’
Output to high
Output to low
Hold output
On error
Output to high
Output to low
Standard output

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
www.fema.es 19
13. Conguration menu (cont.)
Password
Version
Factory reset
‘Dead band’ 0.0 to 100.0%
•at the ‘Dead band’ (d.bnd) parameter set a value between ‘0.0’ %
and ‘100.0’ %. This is a percentage of the ‘input signal high’ parameter
congured at the ‘Advanced scaling’ section. Input signals below this
value, are treated as a ‘0’.
example : instrument congured with code ‘011’ (0/10 mVdc = 4/20 mA)
and ‘input signal high’ parameter modied to 8 mVdc for an effective
input - output relation of ‘0/8 mVdc = 4/20 mA’. Congure the ‘Dead band’
parameter to ‘1.0’ to set a dead band value of 0.08 mVdc. All signals below
0.08 mVdc will be treated as 0 mVdc, and the output will be 4 mA.
•the ‘Version’ (VEr) parameter informs about the rmware version
running in the instrument.
•at the ‘Password’ (PASS) parameter dene a 4 digit code to
block access to the ‘conguration menu’. Activate the password to
prevent access to the instrument conguration by non authorized
personnel. To activate the ‘Password’ function select ‘on’, enter the
code and validate. The password will be requested when accessing
the ‘conguration menu’. The password does not block access to the
‘force’ menu. To deactivate the password, set the parameter to ‘oFF’.
•at the ‘Factory reset’ (FAct) parameter select ‘yes’ to activate the
default factory conguration (see section 15 for a list of factory
default parameters).

FEMA · MANUFACTURING FOR INDUSTRIAL AUTOMATION
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14. Full conguration menu
Press ‘SQ’ (<) for 1 second to access the ‘conguration menu’. For
a description on how to operate inside the menus see section 12.
For a full vision of the ‘conguration menu’ structure see section 13.
Function code
Enter the function code (see section 8)
Input conf. Mode
Load cell mode
Millivolt mode
Signal range
0/5 mV
0/10 mV
0/15 mV
0/20 mV
0/25 mV
0/30 mV
0/40 mV
0/50 mV
0/60 mV
Excitation voltage
Excitation voltage
0/70 mV
0/80 mV
±10 mV
±20 mV
±30 mV
±40 mV
±50 mV
±60 mV
±70 mV
±80 mV
±5 mV
Output range
‘ok’ message ashes while
the ‘eld correction’ function
is being applied and when
nished, the instrument
returns to previous menu
entry.
Field correction Field correction
low
Field correction
low
Advanced scaling Input signal low (in mV’)
Input signal high (in mV’)
Output signal low
Output signal high
Process low
Process high
Process decimal point
Tare value (in mV’)
Display
information
Input signal value (in mV’)
Output signal value
Label
Process value
Signal percentage
Tare value (in mV’)
Excitation current
Excitation voltage
Millivolts at signal terminals (in mV)