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Home/Products & Services/Electronic Counters/E21 Series with RS-485 Communication Function

Electronic Preset CountersE21 Series with RS-485 Communication Function

  • 6 digits
  • LED display
  • Add/Subtract
  • External power supply
  • 72×72mm
  • With output
FeaturesPreset Counter of DIN 72 x 72 mm panel size (Panel cut size 68 x 68 mm)
Easy to edit/program (Individual digit keys)
RS-485 serial interface
Multi-functions: prescaling; tachometer; key locking; batch counter; totalizer; setting decimal-point position; programing initial value at resetting
E21-201/211: preset output selectable (standard output, pre-warn output, batch output)



ModelsPreset LevelDigitsPower SupplyOutput
E21-1011 level preset6AC100 – 240V

Relay Output (Type 1C)

E21-111Open collector Output
E21-2012 level preset
preset / prewarn / batch preset

Relay Output (Type 1C)

E21-211Open collector Output
E21-4014 level preset

Relay Output (Type 1C)

E21-411Open collector Output


DisplayUpper Display : Red LED 10.00 x 5.5
Lower Display : Green LED 8.00 x 4.0
No. of DigitsUpper Display (Preset Counter, Totalizer, Tachometer, Batch Counter) : 6 digits ;
Lower Display (Preset Value) : 6 digits
Setting RangePreset Value (P1 – P4) : -99999 – +999999 ;
Prewarn Value (PW), Batch Preset Value (PB) : 0 – 99999
Count InputOpen Collector (Sink current : approx. 10mA max.)L : 4V max
Voltage (Input impedance 7KΩ) L : 0 – 4V H : 6 – 30V (Available to duplex wire DC sensor)
Maximum Count Speed30 Hz (Pulse width 16msec Duty 1:1)
1 kHz (Pulse width 500µsec Duty 1:1)
5 kHz (Pulse width 100µsec Duty 1:1)
8 kHz (Pulse width 62.5µsec Duty 1:1)
Count ModeAdd/Subtract (Add/Subtract individual input, 90°quadrature input)
PrescaleMultiplying : 0.00001 to 999.999 / Dividing : 1 to 9999 ( 0 setting is not available )
Decimal Point0.0, 0.00, 0.000, 0.0000, 0.00000, No decimal point
WRITE (Setting of initial value at resetting)-99999 – +999999
Key ProtectEnable/disable of front reset, preset value change, mode change
MemoryE²PROM (20 years, can be used 100,000 times )
Tachometer1 / Tau Standard Sampling (measuring accuracy: ±0.1%)
CommunicationRS-485 Serial Interface
Read count value, preset value, or count start value / Read the condition of reset and preset output / Count inhibition and cancellation of count inhibition
ResetFront panel reset via the RESET key, Remote reset via the external reset, Auto-reset *reset function is selectable
OperationOverrun/Auto-reset/Equal/Upper-Lower Limit.
(Model with prewarn function-no Upper-Lower Limit,
with Batch Function-no Upper-Lower Limit/Equal)
Output Type

E21-101 / E21-201 / E21-401
Relay output (Type 1C) : load of 250V AC 3A / 30V DC 3A resistive load * Red Lamp should turn ON at the same time of output.

E21-111/ E21-211 / E21-411
Open Collector Output 30V DC 100mA max. * Red Lamp should turn ON at the same time of output.

Output DelayRelay output 30Hz : 20 ms max. 1kHz, 5kHz, 8kHz : 6ms max
Open Collector Output 30Hz : 15 ms max. 1kHz, 5kHz, 8kHz : 1ms max
OutputOne Shot Pulse, Hold
Output Time10 – 9990 msec (can be set in 10 msec minimum increments)
Sensor Power SupplyDC12V ±10% 100mA maximum
Power SupplyAC100 – 240V -15% / +10%, 50 – 60Hz
Ambient Temp. : Operating-10 – +50°C (non-freezing)
Ambient Humid. : Operating35 – 85%RH (non-condensing)
WeightApprox. 280g

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