Instrumentation Amplifier

  • CE
  • TEDS
  • CC-Link



· 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
  • CC-Link
Models WGA-680A-00 AC model No option
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 No option
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 transducers (4-wire)
Applicable Bridge Resistance 87.5 to 1000 Ω (Up to four 350 Ω
transducers connected in parallel.)
Bridge Excitation 2, 10 VDC, selectable
Measuring Range ±3.2 mV/V (Input range including zero adjustment range)
Zero Adjustment Range Within measurement range
(Not retained when power supply interrupted)
Nonlinearity Within ±(0.02% FS+ 1digit)
Stability Zero point: Within ±0.25 μVRTI/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 Filters: 10, 30, 100, 300 Hz
Attenuation: -12 dB/oct.
Moving average: 0, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, and 2048 times
Min. scale: 1, 2, 5, 10, 20, 50, 100, 200, 500, and 1000 counts
Auto Zero Compensation Zero Tracking (Auto digital zero in the preset range)
Approximated zero compensation: Indication is made zero when the reading is in a preset range of 0 to 9.
Adding Functions Setting Range : ±99999
Original Value Display Functions ±3.2000 mV/V (5 digits)
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: 0 to 99999
Comparison modes: 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)
Types: Arbitrary point hold, peak hold, bottom hold, peak to peak hold, interval definition peak hold, time specification peak hold, interval definition peak to peak hold,time specification peak to peak hold
Delay time: 0.00 to 9.99 s
Detect time: 0.01 to 9.99 s
Display Range: ±99999 (Decimal point to be put anywhere.)
Indicator: 7-segment LED, character height: 14 mm, colors: Red, green, and orange
Update: 0.12, 0.24, 0.49, 0.98, 1.95, 3.90, 7.80, and 15.6 times/s
(In normal mode)
Modes: Normal/hold
Comparators: 5 points (HH, HI, OK, LO, LL)
Status: 2 points (HOLD, LOCK)
Analog (D/A) Output Voltage Output : ±10 V (Load resistance 2 k Ω or more)
Arbitrary scaling possible
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
Nonlinearity : Within ±0.1%FS
Setting contents : Display value of zero, display value of full scale
Control Output Points: 5
Types: HH, HI, OK, LO, and LL
Formats: Open collector (30 VDC, 20 mA max.)
Control Input Points: 3
Types: Zero command, hold command, and reset command
Signal formats: Non-voltage contact signal or open collector signal
(Capacity: 12 VDC, 5 mA or more)
Level Test Functions Display of arbitrary values possible
Display additional functions: Disabled, enabled
Setting range: ±99999
Level test: ON, OFF
Power Supply AC Models: 100 to 240 VAC
DC Models: 10 to 30 VDC
Dimensions 96 W ×96 H ×126 D mm (Excluding protrusions)
Weight Approx. 750 g (Without option)
Operating Temperature -10 to 50 ºC
Operating Humidity 20 to 80% (Non-condensing)
Compliance Directive 2011/65/EU (RoHS)
Directive 2014/30/EU (EMC)
Low Voltage Directive EN61010-1, EN61010-2-030
(Installation category II, Pollution degree 2, Measurement category O)

Option Specifications

BCD Output
Output Data: 20 bits (4-bit×5) , POL (Minus polarity), over,
EOC (End of Conversion), holding section, detecting section
Output format: Open collector (30 VDC, 20 mA max.)
Input Points: 2 (Hold, Output prohibited)
Format: Non-voltage contact signal or open collector signal
(Capacity: 12 VDC, 5 mA)
Output Rate Approx. 15.6, 31.3, 62.5, and 125 times/s
Output Logic Data logic: Positive logic/Negative logic
EOC logic: Positive logic/Negative logic
Polarity logic: Positive logic/Negative logic
Signal System RS-232C Full duplex system
Communication Methods Synchronous
Baud Rate 2400, 4800, 9600, 19200 bps
Bit Configuration Data bits: 7
Stop bit: 1
Parity bit: Odd number
Flow control: None
Signal System RS-485 half duplex system
Baud Rate 2400, 4800, 9600, 19200 bps
Bit Configurations Data bits: 7
Stop bit: 1
Parity bit: Odd number
Flow control: None
Device ID: 1 to 99
Applicable Transducers 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 Function Automatic sensitivity registration by reading TEDS data
Version 1.10
Station Types Remote device station
Occupied Stations 1, 2, 4
Slave Stations 1 to 64
Connection Cable CC-Link version 1.10 compliant cables
(3-conductor twisted pair shielded cable)
Baud Rate 10 M, 5 M, 2.5 M, 625 k, and 156 k bps
Standard Accessories Instruction manual (CD-R)
Unit seal
Screwdriver (-)
Optional Accessories AC power cable for 100 VAC  P-23
AC power cable for 200 VAC  P-28
Input cable for NDIS connector (6 conductors)
U-29 (50 cm)
U-30 (1 m)
U-31 (2 m)
U-32 (5 m)
Input cable for NDIS connector (4 conductors)
U-33 (50 cm)
U-34 (1 m)
U-35 (2 m)
U-36 (5 m)



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