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Precautions, Range Setup
Precautions
WARNING! All wiring must be performed by a qualified electrician
or instrumentation engineer. See diagram for terminal designa-
tions and wiring examples. Consult factory for assistance.
WARNING! Avoid shock hazards! Turn signal input, output, and
power off before connecting or disconnecting wiring, or remov-
ing or installing module.
Précautions
ATTENTION! Tout le câblage doit être effectué par un élec-
tricien ou ingénieur en instrumentation qualifié. Voir le dia-
gramme pour désignations des bornes et des exemples de
câblage. Consulter l'usine pour assistance.
ATTENTION! Éviter les risques de choc! Fermez le signal
d'entrée, le signal de sortie et l'alimentation électrique avant
de connecter ou de déconnecter le câblage, ou de retirer ou
d'installer le module.
API maintains a constant effort to upgrade and improve its products.
Specifications are subject to change without notice. See api-usa.com for
latest product information. Consult factory for your specific requirements.
WARNING: This product can expose you to chemicals includ-
ing nickel, which are known to the State of California to cause
cancer or birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
Electrical Connections
See wiring diagrams. Observe polarity. If the output does not
function, check wiring and polarity.
*
Do not make any connections to unused terminals or use
them as wiring junctions for external devices. This may cause
permanent damage to the module!
Range Selection
It is generally easier to select ranges before installing the mod-
ule on the DIN rail. The tables list available settings for excita-
tion voltages, ranges and offsets. Any custom range settings
will be listed on the module's serial number label
Rotary switches and a slide switches on the side of the module
are used to select input and output ranges to match your
application.
Switch A:
Excitation voltage
Switch B:
Input range
Switch C:
Input offset
Switch D:
Output range
Switch E :
Set to "V" for voltage output or
Set to "I" for current output
Determine how much output in millivolts the load cell will pro-
duce at full load. Multiply the manufacturer's mV/V sensitivity
specification by the applied excitation voltage.
For example, a load cell rated for 3 mV/V sensitivity using 10
VDC excitation will produce an output of 0 to 30 mV for load
variations from 0 to 100%.
3 mV/V sensitivity X 10 VDC excitation = 30 mV range
Output
0-1 V
0-2 V
0-4 V
Switches
BCDE
BCDE
BCDE
Input
0-5 mV
200V
208V
201V
0-10 mV
A00V
A08V
A01V
0-20 mV
300V
308V
301V
0-25 mV
600V
608V
601V
0-30 mV
E00V
E08V
E01V
0-40 mV
B00V
B08V
B01V
000V
008V
001V
0-50 mV
0-100 mV
800V
808V
801V
0-120 mV
F00V
F08V
F01V
0-200 mV
100V
108V
101V
0-250 mV
400V
408V
401V
0-300 mV
C00V
C08V
C01V
0-400 mV
900V
908V
901V
A
A
P
P
BSOLUTE
BSOLUTE
ROCESS
ROCESS
Switch A Excitation Voltage
Refer to the sensor manufacturer's recommendations to deter-
mine what excitation voltage to use.
Set Excitation rotary switch A to desired excitation voltage.
After installation the Excitation fine adjust potentiometer may
be used to precisely trim this voltage, if desired.
I/O Range Selection Switches B, D, E
1. From the table below, find the rotary switch combination that
matches your I/O ranges and set rotary switches B and D.
2. For taring, deadweight, zero offset, or a bipolar sensor refer
to the "Offset Switch C" section at right. Otherwise set
switch C to zero.
3. Set switch E to "V" for voltage output or "I" for current
output.
4. For ranges that fall between the listed ranges use the next
highest setting and trim the output signal with the zero and
span potentiometers as described in the Calibration section.
Using Offset Switch C
Offset switch C allows canceling or taring of non-zero dead-
weights or other sensor offsets such as:
Compensate for tare weights or scale deadweight to get
O
zero output when a load is on the platform.
O
Compensate for low-output sensors (e.g., less than 1 mV/V)
that may have large zero offsets. Switch C can realign the
zero control so it has enough range to produce a zero output.
Raising the offset to allow calibration of bipolar sensors
O
such as ±10 mV.
Lowering the offset to compensate for elevated input
O
ranges such as 10-20 mV.
1. Switch C does not interact with any other switch and is the
only switch needed to correct zero offsets. Its only purpose
is to adjust or cancel effects of the low end of the input
1-5 V
0-5 V
0-8 V
2-10 V
BCDE
BCDE
BCDE
BCDE
206V
209V
202V
207V
A06V
A09V
A02V
A07V
306V
309V
302V
307V
606V
609V
602V
607V
E06V
E09V
E02V
E07V
B06V
B09V
B02V
B07V
006V
009V
002V
007V
806V
809V
802V
807V
F06V
F09V
F02V
F07V
106V
109V
102V
107V
406V
409V
402V
407V
C06V
C09V
C02V
C07V
906V
909V
902V
907V
I
I
NSTRUMENTS
NSTRUMENTS
Excitation Switch A
10 V
A
9 V
9
8 V
8
7 V
7
6 V
6
5 V
5
4 V
4
3
3 V
2 V
2
1 V
1
0 V
0
0-10 V
±5 V
±10 V
0-2 mA 0-4 mA 0-8 mA 2-10 mA 0-10 mA 0-16 mA 4-20 mA 0-20 mA
BCDE
BCDE
BCDE
BCDE
203V
204V
205V
200I
A03V
A04V
A05V
A00I
303V
304V
305V
300I
603V
604V
605V
600I
E03V
E04V
E05V
E00I
B03V
B04V
B05V
B00I
003V
004V
005V
000I
803V
804V
805V
800I
F03V
F04V
F05V
F00I
103V
104V
105V
100I
403V
404V
405V
400I
C03V
C04V
C05V
C00I
903V
904V
905V
900I
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Phone:
800-942-0315
range not corresponding nominally to 0 mV. Setting this
switch to "0" results in no offset.
2. To RAISE the output zero, rotate switch C from "1" thru "7",
until the Zero control can be set for your application.
3. To LOWER the output zero, rotate switch C from "9" thru "F",
until the Zero control can be set for your application.
4. If switch positions are changed, repeat the calibration pro-
cedure on the last page.
Offset % of Span
105%
90%
75%
60%
45%
30%
15%
0%
–15%
–30%
–45%
–60%
–75%
–90%
–105%
Settings for Push-Pull Load Cells
The input range can be thought of as a percentage scale.
Zero percent of the signal range will be a negative number for
push-pull load cells. The high end of the signal will be a posi-
tive number. Add these together to get the span (100% of the
total signal range).
For example, if a load cell has a 1.5 mV/V sensitivity with 10 V
excitation, the range for push-pull will be –15 mV to +15 mV.
This is a span of 30 mV and we would select 30 mV as our input
range. If the range does not match up to what is in the table,
select the next highest input range setting.
For push-pull applications it is common to use a ±5 V or ±10 V
output setting. Use the table below to find your switch settings.
We also need to use "Offset Switch C" to bring the negative
end of our input range up by 50% to 0 mV. The closest setting
is position "B" 45%. This can be adjusted to 50% with the zero
potentiometer when output calibration is done.
BCDE
BCDE
BCDE
BCDE
208I
201I
206I
209I
A08I
A01I
A06I
A09I
308I
301I
306I
309I
608I
601I
606I
609I
E08I
E01I
E06I
E09I
B08I
B01I
B06I
B09I
008I
001I
006I
009I
808I
801I
806I
809I
F08I
F01I
F06I
F09I
108I
101I
106I
109I
408I
401I
406I
409I
C08I
C01I
C06I
C09I
908I
901I
906I
909I
api-usa.com
Fax: 800-949-7502
APD 4059
Switch C
7
6
5
4
3
2
1
0
9
A
B
C
D
E
F
BCDE
BCDE
BCDE
202I
207I
203I
A02I
A07I
A03I
302I
307I
303I
602I
607I
603I
E02I
E07I
E03I
B02I
B07I
B03I
002I
007I
003I
802I
807I
803I
F02I
F07I
F03I
102I
107I
103I
402I
407I
403I
C02I
C07I
C03I
902I
907I
903I
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