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Instructions
Precautions
WARNING! All wiring must be performed by a qualified electrician
or instrumentation engineer. See diagram for terminal designations
and wiring examples. Consult factory for assistance.
WARNING! Avoid shock hazards! Turn signal input, output, and
power off before connecting or disconnecting wiring, or removing
or installing module.
Précautions
ATTENTION! Tout le câblage doit être effectué par un électricien
ou ingénieur en instrumentation qualifié. Voir le diagramme 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 lead and 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
Excitation Voltage and Range Selection
It is easier to set the switches before installation. Common ranges
are listed on the module label.
1. See table below and set Excitation rotary switch A to the
desired voltage. The excitation voltage should match the sensor
manufacturer's recommendations.
Excitation 10V 9V 8V 7V 6V 5V 4V 3V 2V 1V 0V
Switch A A
9
8
7
6
5
2. From the table at right, find the switch combination that matches
your input/output range and set rotary switches B, C, and D.
3. Set the Volt/Curr Select slide switch E to V for voltage or I for
current, depending on the output type.
Excitation
4
Fine Adjust
C
A
Excitation
B
Offset
Volt/Curr
Select
Output
V
I
E
D
Socket and Mounting
The module installation requires a protective panel or enclosure. Use
API 011 or finger-safe API 011 FS socket. The socket clips to a
standard 35 mm DIN rail or can be attached to a flat surface using
the two mounting holes.
Input Terminals
Refer to wiring diagram and strain gauge manufacturer's data sheet
for wiring and color coding. Polarity must be observed when connect-
ing inputs. Connect up to 4 strain gauges or load cells. Sensor shield
wire (if equipped) should be grounded at one end only.
V
EX
Load cell with
– V
V
0
built-in calibration
resistor used with
M02 option
V
EX
Excitation
(–)
(+)
7 and 8
8
7
6
With M02
option
calibration
resistor switch
terminal 11
9
10
11
1
Module
Output
(+)
(–)
power
mA output
Power
PLC,
provides 20 V
AC or
Display,
loop power at
DC+
Recorder
terminal 9
A
P
BSOLUTE
ROCESS
Output 0-1 V
Switches BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE
0-5 mV E10V E11V E12V C12V E13V E15V C15V E16V E18V E19V E10I C12I E13I E15I C15I E16I
±10 mV
0-10 mV E90V E91V E92V C92V E93V E95V C95V E96V E98V E99V E90I C92I E93I E95I C95I E96I
±20 mV
0-20 mV E30V E31V E32V C32V E33V E35V C35V E36V E38V E39V E30I C32I E33I E35I C35I E36I
0-25 mV E50V E51V E52V C52V E53V E55V C55V E56V E58V E59V E50I C52I E53I E55I C55I E56I
±30 mV
0-30 mV ED0V ED1V ED2V CD2V ED3V ED5V CD5V ED6V ED8V ED9V ED0I CD2I ED3I ED5I CD5I ED6I
0-40 mV EB0V EB1V EB2V CB2V EB3V EB5V CB5V EB6V EB8V EB9V EB0I CB2I EB3I EB5I CB5I EB6I
0-50 mV E00V E01V E02V C02V E03V E05V C05V E06V E08V E09V E00I C02I E03I E05I C05I E06I
0-100 mV E80V E81V E82V C82V E83V E85V C85V E86V E88V E89V E80I C82I E83I E85I C85I E86I
0-200 mV E20V E21V E22V C22V E33V E25V C25V E26V E28V E29V E20I C22I E23I E25I C25I E26I
0-250 mV E40V E41V E42V C42V E43V E45V C45V E46V E48V E49V E40I C42I E43I E45I C45I E46I
0-300 mV EC0V EC1V EC2V CC2V EC3V EC5V CC5V EC6V EC8V EC9V EC0I CC2I EC3I EC5I CC5I EC6I
0-400 mV EA0V EA1V EA2V CA2V EA3V EA5V CA5V EA6V EA8V EA9V EA0I CA2I EA3I EA5I CA5I EA6I
±500 mV A60V A61V A62V AE3V A63V A65V AE6V A66V A68V A69V A60I AE3I A63I A65I AE6I A66I
0-1000 mV E60V E61V E62V C62V E63V E65V C65V E66V E68V E69V E60I C62I E63I E65I C65I E66I
0-1200 mV EE0V EE1V EE2V CE2V EE3V EE5V CE5V EE6V EE8V EE9V EE0I CE2I EE3I EE5I CE5I EE6I
Excitation Voltage Connection
Polarity must be observed. Never short the excitation leads togeth-
er. This will cause internal damage to the module.
Signal Output Terminals
Polarity must be observed when connecting the signal output.
Current output provides power to the output loop (sourcing).
4
3
2
1
0
Module Power Terminals
The module operating voltage shown on the model/serial number
label must match available power. AC power can be connected with
either polarity. Polarity MUST be observed for DC powered modules.
Calibration
This procedure and does not account for offset or tare weight
calibration. To achieve optimum results, it is recommended that
the API 4058 G be calibrated using an accurate bridge simulator.
Note: Perform the following calibration procedure any time switch
settings are changed.
4
1. Power the module and allow a minimum 20 minute warm up time.
2. Using an accurate voltmeter across terminals 7 and 8, adjust the
C
excitation voltage fine adjust potentiometer to the required voltage.
Input
3. With the input set at zero or the minimum, adjust the front Zero
pot for a zero or low-end output (for example, 4 mA for a 4-20
4058G
mA output or –10 V with a ±10V output).
4. The zero pot may also be adjusted for a zero reading on the
output display instrumentation, e.g. control system or process
indicator. Adjusting the zero pot this way eliminates calibration
errors in the display instrumentation.
5. Set the input at maximum, and then adjust the Span potentiom-
eter for the exact maximum output desired. The Span control
should only be adjusted when the input signal is at its maximum.
This will produce the corresponding maximum output signal.
6. The calibration procedure should be repeated to achieve the
desired accuracy over the selected range.
Calibration, Models with Option M01 or M02
The M01 option uses a switch and a calibration resistor inside the
–
API module. Ensure that the correct resistance value was specified.
The M02 option uses a switch for the transducer's internal calibra-
tion resistor. The transducer's calibration resistor wires are con-
Strain
+
gauge
0
nected to terminals 5 and 11 on the API 4058 G socket.
The sensor manufacturer should provide the percentage of full-
scale transducer output when using the calibration resistor.
+
Note: Perform the following calibration procedure any time switch
settings are changed.
(–)
(+)
Input from
1. Power the module and allow a minimum 20 minute warm up time.
strain gauge
4 and 5
2. Using an accurate voltmeter across terminals 7 and 8, adjust the
5
4
excitation voltage fine adjust potentiometer to the required voltage.
Socket
3. With the input set at zero or the minimum, adjust the front Zero
top view
pot for a zero or low-end output (for example, 4 mA for a 4-20
mA output or –10 V with a ±10V output).
Key down
4. The zero pot may also be adjusted for a zero reading on the
when panel
output display instrumentation, e.g. control system or process
mounting
indicator. Adjusting the zero pot this way eliminates calibration
2
3
errors in the display instrumentation.
5. Set the Test toggle switch to the Test position. The calibration resis-
tor is switched into the circuit to unbalance the bridge.
6. Adjust the span pot for an 80% FS output or 80% reading on the
process indicator, or per the manufacturer's percentage of FS output.
Power
7. Return the Test switch to the opposite position and readjust
AC or
the zero pot if necessary. The calibration procedure should be
DC–
repeated to achieve the desired accuracy over the selected range.
I
NSTRUMENTS
0-2
0-4
1-5
0-5
0-8
2-10
V
V
V
V
V
V
A33V
AB3V
A03V
1220 American Way Libertyville, IL 60048
Phone:
800-942-0315
Fax: 800-949-7502
API 4058 G
0-10
±5
±10
0-2
2-10
0-10
V
V
V
mA
mA
mA
A36V A38V A39V
AB6V AB8V AB9V
A06V A08V A09V
Using Offset Switch B
Offset switch B allows canceling of sensor offsets such as:
Tare weights or scale deadweight
Compensate for low-output sensors that may have large zero off-
sets. Switch B can realign the zero control so it has enough range
to produce the desired zero output.
Raising the offset to allow calibration of bi-directional sensors.
Lowering the offset to compensate for elevated input ranges.
1. Switch B 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 range not correspond-
ing nominally to 0 mV. Setting this switch to "E" results in no offset.
2. To RAISE the output zero, rotate switch B from "E" thru "A", until
the Zero control can be set for your application.
3. To LOWER the output zero, rotate switch B from "E" thru "9", until
the Zero control can be set for your application.
4. After all switches are set, repeat the calibration procedure.
Output Test Function
Note that models with the M01 or M02 option do not have a Test
function and the Test Cal. potentiometer is non-functional.
The output test potentiometer is factory set to provide approximate-
ly 50% output. When the test button is depressed it will drive the
output with a known good signal that can be used as a diagnostic
aid during initial start-up or troubleshooting. When released, the
output will return to normal.
The Test Cal. potentiometer can be used to set the test output to
the desired level. It is adjustable from 0 to 100% of the output span.
Press and hold the Test button and adjust the Test Cal. potentiom-
eter for the desired output level.
Operation
Strain gauges and load cells are are commonly referred to as bridges
due to their four-resistor Wheatstone bridge configuration. These sen-
sors require a precise excitation source to produce an output that is
directly proportional to the load, pressure, etc. applied to the sensor.
The exact output of the sensor (measured in millivolts) is deter-
mined by the sensitivity of the sensor (mV/V) and the excitation
voltage applied. For example, a load cell rated for 3 mV/V sensitivity
and 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
The API 4058 G provides a precise excitation voltage to the sensors
and receives the resulting millivolt signal in return. This input signal
is filtered and amplified, then offset, if required, and passed to the
output stage. Depending on the output configuration selected, a DC
voltage or current output is generated.
GREEN LoopTracker
®
Input LED – Provides a visual indication
that a signal is being sensed by the input circuitry of the module. It
also indicates the input signal level by changing in intensity as the
process changes from minimum to maximum. If the LED fails to illu-
minate, or fails to change in intensity as the process changes, this
may indicate a problem with module power or signal input wiring.
RED LoopTracker Output LED – Provides a visual indication that
the output signal is functioning. It becomes brighter as the input and
the corresponding output change from minimum to maximum. For
current outputs, the RED LED will only light if the output loop current
path is complete. For either current or voltage outputs, failure to illu-
minate or a failure to change in intensity as the process changes may
indicate a problem with the module power or signal output wiring.
api-usa.com
0-16
4-20
0-20
mA
mA
mA
A35I
AB5I
A05I
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