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Process timer (digital time relay) ETC31

Process timer (digital time relay) ETC31

The ELHART ETC31-SL process timer is a microprocessor-based, panel-mount time relay. It counts set time intervals with high accuracy and automates process control by switching the load via a built-in electromagnetic relay, using one of five operation modes:
   —ON delay.
   —Interval (ON for a set time).
   —Delayed interval.
   —Symmetrical repeat cycle (equal ON and OFF times).
   —Asymmetrical repeat cycle (independent ON and OFF times).

The timer supports single-shot and continuous cycling modes and can accepts external START, STOP, and PAUSE signals.

Modifications Where to buy?

Timer ETC31-SL-R
ETC31-SL-R
  • Design: size SL (48×96 mm)
  • Inputs: 3×digital
  • Output: 1×relay (R)
  • Options: -
Timer ETC31-SL-R-W
ETC31-SL-R-W
  • Design: size SL (48×96 mm)
  • Inputs: 3×digital
  • Output: 1×relay (R)
  • Options: white front panel
  • Functional diagram of the ELHART ETC31 timer
    Functional diagram of the ELHART ETC31 timer
    Functional diagram of the ELHART ETC31 timer
  • Features of the ELHART ETC31 process timer
    • Control. Front panel control or remote control via three digital inputs (START, STOP, PAUSE).
    • Indication. Depending on the selected count direction, the main (large) display shows elapsed or remaining time. The auxiliary (small) display shows the active setpoint (t1 or t2).
    • Design. Panel-mount housing with a 48×96 mm front panel (IP65 front-side protection). Pluggable terminal blocks ensure easy installation and maintenance. Black and white front panels are available as standard; custom versions can be provided for OEM manufacturers.
    • User interface. Parameters are split into two groups: process values (time setpoints, cycle counts) and system settings (operation modes, inputs, outputs, display, and buzzer). Individual buttons can be locked, and device parameters can be password-protected.
    • Power-fail Memory & Autostart. The ETC31-SL timer stores elapsed time in non-volatile memory during power failure and automatically resumes operation from the interruption point upon power restoration.
    • End-of-Cycle notification. Upon cycle completion, the display shows the last active setpoint or status messages ----, done, End, ouEr, rUn.) in static or flashing mode. An integrated buzzer provides acoustic notification and can be disabled if required.
  • Technical characteristics of the ELHART ETC31 timer
    Parameter Value
    Size 48 x 96 mm
    Operation modes ON delay
    Interval
    Delayed interval
    Symmetrical repeat
    Asymmetrical repeat
    Input type NPN, dry contact
    Maximum high-level voltage on digital inputs 30 VDC
    High-level voltage on digital inputs from 4 VDC
    Low-level voltage on digital inputs max 2 VDC
    Minimum pulse duration on digital inputs 2 ms
    Output type electromagnetic relay (SPDT, NO+NC)
    Maximum switching voltage and current 250 VAC, 30 VDC, 5 А resistive load
    ON / OFF delay max 10 ms
    Electrical switching resource min 100,000 cycles
    Mechanical switching resource min 10 million cycles
    Buzzer sound pressure level max 75 dB
    Supply voltage 85...265 VAC / 50 Hz (nominal 230 VAC)
    Power consumption max 3 W
    Ingress Protection IP65 (front panel)
    IP20 (housing)
    Operating and storage temperature -20...+50 °С
    Relative humidity (operating and storage) max 80% (without condensation)
    Atmospheric pressure 84...107 kPa
    Weight max 200 g
    Overall dimensions (H × W × D) 48 x 96 x 114 mm
    Service life min 10 years
    Time counting characteristics
    Time setpoint ranges Format Range Min. step
    HH:MM from 00 h : 01 min to 99 h : 59 min 1 min
    MM:SS from 00 min : 01 s to 99 min : 59 s 1 s
    SS:MS from 00 s : 01 ms to 99 s : 99 ms * 10 ms
    HHHH from 0001 hours to 9999 hours 1 h
    MMMM from 0001 min to 9999 min 1 min
    SSSS from 0001 s to 9999 s 1 s
    Internal clock error max ±100 ppm

    * — the device display shows only tenths and hundredths of a second; minimum step is 10 ms.

  • Connection diagram of the ELHART ETC31 timer
    Connection diagram of the ETC31 timer
    Connection diagram of the ETC31 timer
  • Overall dimensions of the ELHART ETC31 timer
    Overall dimensions of the ETC31 timer, mm
    Overall dimensions of the ETC31 timer, mm