Instrumentation Amplifier

  • CE
  • TEDS



· CC-Link optional available
· High-performance processing (Sampling speed: 4000 times/s, 24-bit A/D converter)
· Substantial comparison functions (Extra high, high, OK, low, and extra low)
· Built-in D/A converter (Sampling speed: 4000 times/s)
· Display: -99999 to 99999


The WGA-680A is an Instrumentation Amplifier which can display the physical quantity of an input sensor.

Products table

All display

Instrumentation Amplifier

  • CE
  • TEDS
Model WGA-680A-00 AC model None
WGA-680A-01 AC model BCD/TEDS
WGA-680A-02 AC model RS-232C/TEDS
WGA-680A-03 AC model RS-485/TEDS
WGA-680A-04 AC model CC-Link
WGA-680A-10 DC model None
WGA-680A-11 DC model BCD/TEDS
WGA-680A-12 DC model RS-232C/TEDS
WGA-680A-13 DC model RS-485/TEDS
WGA-680A-14 DC model CC-Link


Channels 1
Applicable Sensors Strain-gage transducer
Applicable Bridge Resistance 87.5 to 1000 Ω
(Up to four 350 Ω transducers can be connected in parallel.)
Bridge Excitation 2, 10 VDC, selectable
Measuring Range ±3.2 mV/V (Input range including zero adjustment range)
Zero Adjustment Within measurement range
(Not retained when power supply interrupted)
Nonlinearity Within ±(0.02% FS+ 1digit)
Stability Zero point: Within ±0.25μVRTI/ºC
Sensitivity: Within ±0.01%/ºC
Sampling Speed 4000 times/s
A/D Resolution 24 bits
Calibration Actual load calibration, sensitivity registering calibration, and
Numeric value registering calibration
Smoothing Functions Filter: 10, 30, 100, Flat (300 Hz)
Attenuation characteristics: -12 dB/oct.
Moving average: None, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, and 2048 times
Minimum scale: 1, 2, 5, 10, 20, 50, 100, 200, 500, and 1000 counts
Adding Functions Setting Range : Setting range: ±99999
Original Value Display Functions ±3.2000 mV/V
Accuracy: Within ±0.1%FS
Comparator Functions Points: 4
Patterns: Registers 4 groups of pattern files (Comparative values) and
enables switching through setting of functions
Types: extra high (HH), high (HI), OK, low (LO), extra low (LL)
Setting Range: ±99999
Hysteresis Width: 0 to 99999
Comparison Mode: normal, at hold
High/Low Assignment: Enables assigning high or low to each comparator
Hold Functions Digital peak/bottom hold (Without analog peak/bottom hold)
Type: Arbitrary point hold, peak hold, bottom hold, peak to peak hold,
interval definition peak hold, time specification peak hold,
interval definition peak hold, time specification peak hold,
interval definition peak to peak hold, time specification peak to peak hold
Delay times: 0.00 to 9.99 second
Detect times: 0.01 to 9.99 second
D/A Output Voltage Output: ±10 V (Load resistance 2 k Ω or more)
Current Output: 4 to 20 mA (Load resistance 500 Ω or less)
Corresponds to voltage output of 0 to 10 V.
Conversion Speed: 4000 times/s
Non-linearity: Within ±0.1%FS
Setting contents: Display value of zero, Display value of full scall
Control Input The number of points: 3
Type: Zero order, hold order, and reset order
Signal Format: Non-voltage contact signal, or open collector
(Capacity: 12 VDC, 5 mA or more)
Control Output The number of points: 5
Type: HH, HI, OK, LO, and LL
Output Format: Open collector (Capacity: 30 VDC, 20 mA max)
Level Test Functions Display of arbitrary values possible
Display additional function: Disabled, Enabled
Setting range: ±99999
Level test: ON, OFF
Power Supply AC Models: 100 to 240 VAC, 20 VA or less
DC Models: 10 to 30 V, 10 W or less
Dimensions 96 W × 96 H ×126 D mm (Not including Protrusions)
Weight Approximately 750 g (Without option)
Operating Temperature and Humidity -10 to 50ºC, 20 to 80%RH (Noncondensing)
Applicable Standard
EMC Directive EN61326-1 (Class A)
Low Voltage Directive EN61010-1, EN61010-2-030
(Installation category II, Pollution degree 2, Measurement category O)
RoHS Directive EN50581

Option Specifications

BCD Output
Output Data: 20 bits (4 bits × 5)
POL (Minus polarity), Over, EOC (End of Conversion),
Holding section, Detecting section
Output Formats: Open collector (Capacity: 30 VDC, 20 mA max)
Input Points: 2
(Hold, Output prohibited)
Input Formats: Non-voltage contact signal, or open collector signal
(Capacity: 12 VDC, 5 mA or more)
Output Channels Approx. 15.6, 31.3, 62.5, and 125 times/s
Output Logic Data Logic: Negative logic/Positive logic
EOC Logic: Negative logic/Positive logic
Polarity Logic: Negative logic/Positive logic
Signal System RS-232C Full duplex system
Communication Speed Asynchronous
Bit Configuration 2400, 4800, 9600, and 19200 bps
Flow Control Data bits: 7
Stop bit: 1
Parity bit: Odd number
Transmission Modes Not compatible
Signal System RS-485 Half duplex system
Communication Speed 2400, 4800, 9600, and 19200 bps
Bit Configuration Data Bits : 7
Stop Bits : 1
Parity Bits : Odd number
Flow Control Not compatible
Device ID 1 to 99
Applicable Transducers It should have the information according to IEEE template No. 33,
cable length should be 30 m or less.
Interfaces Compatible with IEEE1451.4 Mixed Mode Transducer Interface Class 2
Calibration Functions Automatic sensitivity registration by reading TEDS data
Version Ver. 1.10
Station Types Remote device station
Occupied Stations 1station, 2 stations, 4 stations
Communication Speed 10 M, 5 M, 2.5 M, 625 k, 156 k bps
Slave Stations 1 to 64
Connection Cable CC-Link Ver. 1.10-compliant cable
(Shielded, 3-core twisted pair cable)
Standard Accessories Instruction manual (CD)
Unit seal
Screwdriver (-)

Optional Accessories

Optional Accessories ●AC power cables
P-23 for 100 VAC, P-28 for 200 VAC
●Input cables
6-conductor NDIS connector U-29 to U-32
U-29 (50 cm), U-30 (1 m), U-31 (2 m), U-32 (5 m)
4-conductor NDIS connector U-33 to U-36
U-33 (50 cm), U-34 (1 m), U-35 (2 m), U-36 (5 m)

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