© 2016 Littelfuse Protection Relays & Controls

Time Delay Relays

Dedicated - Recycle

www.littelfuse.com/esdr

Rev: 1-A-061016

ESDR SERIES

Description

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.

Features & Benefits

FEATURES

BENEFITS

Microcontroller based

Repeat Accuracy + / -0.1%,

Factory calibration + / - 5%

1A steady, 10A inrush

solid-state output

Provides 100 million operations in typical conditions.

Totally solid state

and encapsulated

No moving parts to arc and wear out over time and

encapsulated to protect against shock, vibration,

and humidity

ON/OFF recycling with

independent adjustment

of both time periods

Separate on and off timing settings are knob

adjustable for added flexibility

Compact, low cost

design measuring 2 in.

(50.8mm) square

Allows flexiblility for OEM applications

Ordering Information

See next page.

Wiring Diagram

V = Voltage

L = Load

T1 = ONTime

T2 = OFFTime

RT is used when external

adjustment is ordered.

A knob is supplied for

adjustment on the unit;

terminals for external

adjustment.

L1

N/L2

(Positive Switching)

(Negative Switching)

Accessories

P1004-95, P1004-95-X Versa-Pot

Panel mountable, industrial potentiometer

recommended for remote time delay adjustment.

P1023-6 Mounting bracket

The 90° orientation of mounting slots makes

installation/removal of modules quick and easy.

P0700-7 Versa-Knob

Designed for 0.25 in (6.35 mm) shaft of

Versa-Pot. Semi-gloss industrial black finish.

P1015-64 (AWG 14/16) Female Quick

Connect

These 0.25 in. (6.35 mm) female terminals are

constructed with an insulator barrel to provide

strain relief.

P1015-18 Quick Connect to Screw Adapter

Screw adapter terminal designed for use with

all modules with 0.25 in. (6.35 mm) male quick

connect terminals.

C103PM (AL) DIN Rail

35 mm aluminum DIN rail available in a 36 in.

(91.4 cm) length.

P1023-20 DIN Rail Adapter

Allows module to be mounted on a 35 mm DIN

type rail with two #10 screws.