ESDR221A2
Littelfuse Relays, ESDR Series

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ESDR221A2 Littelfuse Relays, ESDR Series, Recycling Timer, 24VAC, 1-100 Sec
MFG Item Number
ESDR221A2
Littelfuse
main product photo

ESDR221A2 Littelfuse Relays, ESDR Series, Recycling Timer, 24VAC, 1-100 Sec

MFG Item Number
ESDR221A2
Littelfuse
Series
ESDR
More specs
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Description

Relays, ESDR Series
Item #
ESDR221A2
Recycling Timer, 24VAC, 1-100 Sec

ESDR Series Information

  • ON/OFF Recycling with Independent‑Adjustment of both the On and Off Periods
  • Factory Fixed, Onboard or External Adjust
  • 0.1s to 1000m in 6 Ranges
  • ±0.1% Repeat Accuracy
  • ±5% Factory Calibration
The ESDR Series offers independent time adjustment of both delay periods. Adjustment options include fixed, onboard or external adjust. The ESDR is recommended for air drying, automatic oiling, life testing, chemical metering and automatic duty cycling. This series is designed for general purpose commercial and industrial applications where a small, cost effective, reliable, solid‑state timer is required. The factory calibration for fixed time delays is <±5%. The repeat accuracy, under stable conditions, is 0.1% of the selected time delay. This series is designed for input voltages of 12VDC to 230VAC in five ranges. Time delays of 0.1 seconds to 1000 minutes are available in six ranges. The output is rated 1A steady and 10A inrush. The modules are totally solid state and encapsulated to protect the electronic circuitry.

Operation (Recycling ‑ ON Time First): Upon application of input voltage, the output energizes and the T1, ON time begins. At the end of the ON time, the output de‑energizes and the T2, OFF time begins. At the end of the OFF time, the output energizes and the cycle repeats as long as input voltage is applied. Reset: Removing input voltage resets the output and time delays, and returns the sequence to the first delay.

Operation (Recycling ‑ OFF Time First): Upon application of input voltage, the T2 OFF time begins. At the end of the OFF time, the output energizes and the T1 ON time begins. At the end of the ON time, the output de‑energizes and the cycle repeats as long as input voltage is applied. Reset: Removing input voltage resets the output and time delays, and returns the sequence to the first delay.

  • Available in AC or DC Voltages

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Specifications

Specifications
Manufacturer Part Number ESDR221A2
Manufacturer Littelfuse
Product Series ESDR
Family Series Littelfuse Relays, ESDR Series
Description Recycling Timer, 24VAC, 1-100 Sec ON Time, 10-1000 Sec OFF Time, Onboard Adjustable, 1A Max Load
Operation Repeat Cycle
Contacts Solid State
Mounting Surface
Time Range Adjustment Onboard
Adjustment Operator Knob
Timing Range 1-100 s (ON), 10-1,000 s (OFF)
Max Time 1,000 s, 100 s
Time Tolerance 5 %
Coil Voltage 24 VAC
Nominal Coil Voltage 24 VAC
Contact Rating 1 A
Termination 0.250 in Flat Blade
Approvals CE, CSA, UL
Comments ON Time First
Net Weight 0.12 lbs
Gross Weight 0.14 lbs