Strain Gauge/Bridge/Load Cell/Pressure Transducer to DC Transmitters, Field Rangeable
API 4059 G
Input:
One to Four 350
W
Sensors, 0-5 mV to 0-400 mV, 4-10 VDC Excitation
Output:
0-1 V to ±10 V or 0-1 mA to 4-20 mA, Isolated
Applications
Options—add to end of model number
M01
Switch with built-in calibration resistor.
Specify resistor value.
M02
Switch for external calibration resistor
DF
10 millisecond response time, or consult factory
DF option will cause output noise levels greater
than standard specifications.
U
Conformal coating for moisture resistance
Accessories—order as separate line item
API 011
11-pin socket
API 011 FS
11-pin finger-safe socket
API CLP1
Module hold-down spring for high vibration or
mobile applications
Model
Input
Output
Power
API 4059 G
Field configurable. Specify the fol-
lowing if factory is to set switches
Bridge mV/V or mV range
Excitation voltage
Field configurable. Specify follow-
ing if factory is to set switches
Output range
Output type (V or mA)
115 VAC
API 4059 G A230
230 VAC
API 4059 G D
9-30 VDC
Description
The API 4059 G accepts a strain gauge, bridge, load cell, or a
summed input from up to four sensors, and provides a propor-
tional, isolated DC voltage or current output. It includes filtering
and processing to allow effective use of low-level transducers
in the noisy environments found in industrial applications. The
full 3-way (input, output, power) isolation makes this module
useful for ground loop elimination, common mode signal rejec-
tion or noise pickup reduction.
The 120 mA adjustable bridge excitation power supply gener-
ates a stable source of excitation voltage to drive from one to
four 350
W
(or greater) bridge type sensors such as load cells,
pressure transducers and strain gauges and amplifies and
converts the resulting millivolt signal into the selected output.
Sense lead circuitry is included to cancel the effects of leadwire
resistance, if required.
Input, output, excitation and zero offset are field configurable,
via external rotary and slide switches. Common ranges are on
the module label. Offsets up to ±100% of span can be used to
cancel sensor offsets or non-zero deadweights (taring). Non-
interactive zero and span simplifies calibration.
LoopTracker
API exclusive features include two LoopTracker LEDs (green for
input, red for output) that vary in intensity with changes in the
process input and output signals. These provide a quick visual
picture of your process loop at all times and can greatly aid in
saving time during initial startup and/or troubleshooting.
Output Test
An API exclusive feature includes the test button to provide a
fixed output (independent of the input) when held depressed.
The output test button greatly aids in saving time during initial
startup and/or troubleshooting. The test output level is potenti-
ometer adjustable from 0 to 100% of output span.
The output test is not available with the M01 or M02 options. A
calibration resistor switch replaces the test button.
Mounting
The API 4059 G plugs into an industry standard 11-pin octal
socket sold separately. Sockets API 011 and finger-safe API
011 FS allow either DIN rail or panel mounting.
Strain Gauge Input Ranges
Minimum:
0 to 5 mV range
0.5 mV/V sensitivity
Maximum:
0 to 400 mV range 40 mV/V sensitivity
Millivolt output range is determined by the sensor sensitivity
(mV/V) and the excitation voltage:
mV/V sensitivity X excitation voltage = total mV range
Input Impedance
200 k
W
typical
Common Mode Rejection
100 dB minimum
Calibration Resistor Options
M01 option: Toggle switch with calibration resistor inside
module. Specify resistor value.
M02 option: Toggle switch for external (load cell) calibration
resistor.
Excitation Voltage
Maximum output: 10 VDC maximum at 120 mA
Drive capability:
Up to four 350
W
bridges at 10 VDC
Switch-selectable: 0-10 VDC in 1 V increments
Fine adjustment:
±5% via multi-turn potentiometer
Stability:
±0.01% per °C
Sense Lead Compensation
Better than ±0.01% per 1
W
change in leadwire resistance.
10
W
max. for 10 VDC excitation w. 350
W
bridge
Zero Offset (Tare)
±100% of span in 15% increments
LoopTracker
Variable brightness LEDs for input/output loop level and status
DC Output Ranges
Voltage:
0-1 VDC to 0-10 VDC
Bipolar voltage:
±1 VDC to ±10 VDC
Current:
0-2 mADC to 0-25 mADC
20 V compliance, 1000
W
at 20 mA
Output Calibration
Non-interactive multi-turn zero and span potentiometers
±15% of span adjustment range typical
Output Test
Sets output to test level when pressed
Adjustable 0-100% of span
Not available with M01 or M02 options
Output Ripple and Noise
Less than 10 mV
RMS
Linearity
Better than ±0.1% of span
Ambient Temperature Range and Stability
–10°C to +60°C operating ambient
Better than ±0.02% of span per °C stability
Response Time
70 milliseconds typical (14.2 Hz)
DF option: 10 millisecond response time typical (100 Hz)
Isolation
2000 V
RMS
minimum
Full isolation: power to input, power to output, input to output
Q
Load Cell Weighing Systems and Scales
Q
Strain Gauge Pressure Sensors and Transducers
Q
Tanks, Scales, Extruder Melt Pressure, Crane Loads
Hot Swappable
Plug-In Design
O
Drive up to Four 350
W
Bridges
O
Adjustable Excitation Power Supply
O
Sense Lead Compensation
O
Easy to Cancel or Tare Out Deadweights
O
One Minute Setup for Hundreds of I/O Ranges
O
Full 3-Way Input/Output/Power Isolation
O
Hot-Swappable Plug-In Design
O
Non-Interactive Zero and Span
O
Full 3-Way Input/Output/Power Isolation
O
Input and Output LoopTracker
®
LEDs
O
Output Test or Calibration Resistor Options
Quick Link
api-usa.com/4059
Minute
Setup!
1
2.75"
11-Pin Socket
Sold Separately
2.38"
1.75"
Variable Brightness
Input LED
Output Test Button
Output Test Adjust
Output Span
Output Zero
Variable Brightness
Output LED
Free Factory
I/O Setup!
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Made in USA
API 011
300 V Rating
API 011 FS
300 V Rating
API CLP1
Housing and Sockets
IP 40, requires installation in panel or enclosure
Plugs into API 011 or API 011 FS socket
Socket mounts to 35 mm DIN rail or can be surface mounted
Power
Standard: 115 VAC ±10%, 50/60 Hz, 2.5 W max.
A230 option: 230 VAC ±10%, 50/60 Hz, 2.5 W max.
D option:
9-30 VDC, 2.5 W typical
M01/M02 Switch
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