Intermatic ET1100 Series Electronic Time Switches

Product Overview

The ET1100 Series 24-Hour Electronic Time Switches from Intermatic offer dependable and uncomplicated performance for precise load control and energy cost reduction. These time switches enable a program to be repeated on a daily basis, with up to 28 setpoints or events programmable for automatic repetition. The program can be temporarily disabled by placing the time switch in Manual operating mode. Control buttons allow independent manual control of each circuit, irrespective of the operating mode. All models are equipped with two industrial-grade AAA alkaline batteries for timekeeping and automatic carryover, providing a minimum of 3 years of operation. These batteries are easily replaceable in the field without requiring the removal of the time switch mechanism or field wiring. Each time switch is housed in a lockable enclosure designed to protect against vandalism and unauthorized tampering.

Features

• Program repeats on a daily basis.
• Multi-volt operation from 120-277 VAC, 50/60 Hz.
• To-the-minute programming for accurate load control and reduced energy costs.
• Supports up to 28 setpoints or events.
• Automatic Daylight Saving Time (DST) ON/OFF adjustment (factory enabled).
• Non-volatile EEPROM memory retains programming indefinitely.
• 2-circuit models are field-configurable (via jumper) for:
  • 2 independent outputs,
  • DPST output,
  • or 1 channel ON pulse/OFF pulse output.
• Temporary or permanent manual override available via control buttons.

Ratings and Specifications

General Ratings

Enclosure Options: Standard: Type 1 Gray Painted Steel; R-Option: Type 3R Gray Painted Steel; PD82 Option: Type 3R Gray; High-Impact UV Resistant Polycarbonate Plastic with Clear Cover.

Knockouts: Combination 1/2" & 3/4". Bottom: 2, Left: 1, Right: 1, Back: 1.

Input Voltage: 120, 208, 240, or 277 VAC, 50/60 HZ.

Operating Temperature: -40°F to 155°F (-40°C to 68°C).

Contact Ratings (ET1105, ET1125 Models)

• N.O. Contact Ratings:
• Resistive: 30 Amps @ 120/240 VAC
• Resistive: 20 Amps @ 28 VDC
• Inductive: 30 Amps @ 120/240 VAC
• Tungsten: 5 Amps @ 120/240 VAC
• Ballast: 20 Amps @ 120-277 VAC
• Motor: 1 HP @ 120 VAC
• Motor: 2 HP @ 240 VAC

Contact Ratings (ET1115 Models)

• N.O./N.C. Contact Ratings:
• Resistive: 20 Amps (N.O.), 10 Amps (N.C.) @ 120/240 VAC
• Inductive: 20 Amps (N.O.), 10 Amps (N.C.) @ 120/240 VAC
• Tungsten: 5 Amps (N.O.) @ 120/240 VAC
• Ballast: 20 Amps (N.O.), 3 Amps (N.C.) @ 120-277 VAC
• Motor: 1 HP (N.O.); 1/4 HP (N.C.) @ 120 VAC
• Motor: 2 HP (N.O.); 1/2 HP (N.C.) @ 240 VAC

Additional Features

• Pulse Feature: 2-circuit models feature a 2-second pulse option for contactor and bell ringing applications.
• Auto DST: Automatic adjustment for Daylight Saving Time.
• Battery Backup: Two field-replaceable AAA batteries maintain date and accurate time for a minimum of three years. Batteries can be replaced when power to the mechanism is activated.
• Wiring Terminals: #18 to #10 AWG wire.
• Minimum ON/OFF Time: 1 minute.
• Maximum ON/OFF Time: 23 hours 59 minutes.
• Warranty: Limited 1 year.

Model Comparison

*Can be wired as DPST

Specification Details

The time switch shall be of the 24-hour electronic type, capable of permitting up to 28 setpoints or events. The time switch shall provide a minimum ON or OFF time of 1 minute. The time switch is powered by 120, 208, 240, or 277 VAC, 50/60 Hz power supply. The time switch mechanism features a snap-in design for easy removal from the enclosure. The enclosure options include Type 1 steel, Type 3R steel, or Type 3R plastic, all lockable and painted with an electrostatic process to prevent corrosion. Terminal identification is clear on a non-curling terminal insulator. Terminal connections use teeter-type terminal screws for secure connections for wire sizes up to #10 AWG. Switch configuration can be SPST, DPST, or SPDT, with UL or CSA listed switch ratings as follows:

SPST Configuration Ratings:

• Resistive: 30 Amps @ 120/240 VAC
• Resistive: 20 Amps @ 28 VDC
• Inductive: 30 Amps @ 120/240 VAC
• Tungsten: 5 Amps @ 120/240 VAC
• Ballast: 20 Amps @ 120-277 VAC
• Motor: 1 HP @ 120 VAC
• Motor: 2 HP @ 240 VAC

SPDT Configuration Ratings:

• Resistive: 20 Amps (N.O.), 10 Amps (N.C.) @ 120/240 VAC
• Inductive: 20 Amps (N.O.), 10 Amps (N.C.) @ 120/240 VAC
• Tungsten: 5 Amps (N.O.) @ 120/240 VAC
• Ballast: 20 Amps (N.O.), 3 Amps (N.C.) @ 120-277 VAC
• Motor: 1 HP (N.O.); 1/4 HP (N.C.) @ 120 VAC
• Motor: 2 HP (N.O.); 1/2 HP (N.C.) @ 240 VAC

The time switch is UL or CSA listed under UL category 916 Energy Management Equipment and is available under Intermatic model numbers as listed.

Wiring Diagrams

The following diagrams illustrate common wiring configurations for the ET1100 Series time switches:

ET1105-120 VAC-SPST

Wiring diagram for a 120 VAC SPST time switch. Shows Line, Neutral input, and Load output. Includes a note about installing a jumper if timer input and load voltage are the same.

ET1115-SPDT (Load Switching)

Wiring diagram for a SPDT time switch with load switching. Shows L1, L2 input, and two Load outputs (Load 1, Load 2). Includes a note about installing a jumper if timer input and load voltages are the same.

ET1125-240 VAC-DPST

Wiring diagram for a 240 VAC DPST time switch. Shows L1, L2 input and Load output. Configuration jumper set to "SIM".

ET1125-Pulse 2x SPST

Wiring diagram for a 2x SPST time switch with pulse functionality. Shows L1, L2/Neutral input, and connections for a maintained contactor (COM, CLOSE, OPEN). Configuration jumper set to "PUL".

ET1125-2x SPST

Wiring diagram for a 2x SPST time switch. Shows 120/208/240/277 VAC input (L1, L2/Neutral, L3, L4/Neutral) and two Load outputs (Load 1, Load 2). Configuration jumper set to "IND".

ET1125-Pulse 2x SPST (Bell Ringing)

Wiring diagram for a 2x SPST time switch with pulse functionality for bell ringing. Shows L1, L2/Neutral input and Load output. Configuration jumper set to "PUL". Notes that each event (ON or OFF) rings a bell.