Strain Gauge/Bridge/Load Cell/Pressure Transducer to DC Transmitters, Field Rangeable
APD 4059
Input:
100
Ω
to 10,000
Ω
Bridges, 0.5 mV/V to 40 mV/V, 1-10 VDC Excitation
Output:
0-1 V to ±10 V or 0-2 mA to 4-20 mA (Sink or Source)
O
Drive up to Four 350
Ω
Bridges
O
Adjustable Excitation Power Supply
O
Sense Lead Compensation
O
One Minute Setup for Hundreds of I/O Ranges
O
Removable Plugs for Faster Installation
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
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
Special response time. Add DF to model number
followed by value in milliseconds (10 to 5000)
Option—add to end of model number
U
Conformal coating for moisture resistance
Accessories—order as separately
SG-EQ4
Junction/sum board
SG-EQ4-BOXPG7
Junction/sum box
Trim pots for up to 4 strain gauges.
For 4-wire or 6-wire load cells.
API BP4
Spare 4 terminal plug, black
Model
Input
Output
Power
APD 4059
Field configurable. Specify the following 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)
85-265 VAC or 60-300 VDC
APD 4059 D
9-30 VDC or 10-32 VAC
Description
The APD 4059 accepts an input from one to four strain gauges,
bridge type sensors, load cells, or pressure transducers. It
filters, amplifies, and converts the resulting millivolt signal
into the selected DC voltage or current output that is linearly
related to the input.
The full 3-way (input, output, power) isolation makes this mod-
ule useful for ground loop elimination, common mode signal
rejection or noise pickup reduction.
The adjustable excitation power supply generates a stable
source of voltage to drive from one to four 350
Ω
(or greater)
devices. 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. 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.
Sink/Source Versatility
For maximum versatility the APD 4059 milliamp output can be
selectively wired for sinking or sourcing. This allows connec-
tion to any type of mA input receiving device.
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.
Housing and Connectors
IP 40, requires installation in panel or enclosure
For use in Pollution Degree 2 Environment
Mount vertically to a 35 mm DIN rail
Four 4-terminal removable connectors
14 AWG max wire size
Dimensions
0.89" W x 4.62" H x 4.81" D
22.5 mm W x 117 mm H x 122 mm D
Height includes connectors
Power
Standard: 85-265 VAC, 50/60 Hz or 60-300 VDC
D
option:
9-30 VDC (either polarity) or 10-32 VAC
Power:
2 to 5 Watts depending on number of load cells
Strain Gauge Input Ranges
100
Ω
to 10,000
Ω
bridges at 10 VDC
Up to four 350
Ω
bridges at 10 VDC
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
Ω
typical
Common Mode Rejection
100 dB minimum
Calibration Resistor Options
M01 option: Switch with calibration resistor inside module.
Specify resistor value.
M02 option: Switch for external (load cell) calibration resistor.
Excitation Voltage
Switch Selectable: 0-10 VDC in 1 V increments
Maximum Output: 10 VDC maximum at 120 mA
Drive Capability:
Up to four 350
Ω
bridges at 10 VDC
Fine Adjustment:
±5% via multi-turn potentiometer
Stability:
±0.01% per °C
Sense Lead Compensation
Better than ±0.01% per 1
Ω
change in leadwire resistance
Maximum leadwire resistance: 10
Ω
with 350
Ω
at 10 VDC
LoopTracker
Variable brightness LEDs for input/output loop level and status
DC Output Ranges
Voltage (10 mA max.):
0-1 VDC
to 0-10 VDC
Bipolar Voltage (±10 mA max.): ±5 VDC
or ±10 VDC
Current:
0-2 mADC to 0-20 mADC
Compliance, drive at 20 mA:
20 V, 1000
Ω
drive
Current output can be selectively wired for sink or source
Output Calibration
Multi-turn zero and span potentiometers
±15% of span adjustment range typical
Zero offset switch: ±100% of span in 15% increments
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
ripple and noise
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, nominal
Response Time
Nominal time at 63.2% of step change
Standard: 70 milliseconds (14.3 Hz)
DF option: Special response time, DF10 (10 milliseconds
or 100 Hz) up to DF5000 (5 seconds). Faster than standard
response times will cause output noise levels to be greater
than standard specifications. Contact factory for assistance.
Isolation
1200 V
RMS
min.
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
Universal Power
Removable Plugs
Minute
Setup!
1
Free Factory
I/O Setup!
H H H H H H
H H H H H
H H H H H H
H H H H H
H H H H H H
H H H H H
H H H H H H
H H H H H
H H H H H H
Made in USA
File E145968
85-265 VAC, 60-300 VDC
model only
Output LoopTracker
LED
Input LoopTracker
LED
Test Switch for
Calibration Resistor
Connect mA Output
for Sink or Source
Hundreds of Range
Selections
Internal/External
Calibration Resistor
Options
Zero and Span for
Output
Connect up to 4
Load Cells
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
See Wiring
Diagrams on
Page 3
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