
Accessories (each sold separately)
Temperature Sensor
Model TS3/OAT is a sealed, outdoor solid-state temperature sensor designed to interface direct-
ly with the EL78.
Specifications: Operating temperature: -40 F to 167 F (-40 C to 75 C), Resolution: 1.5F (1C)
Model TS3/SAT is an unsealed, indoor solid-state temperature sensor designed to interface
directly with the EL78.
Specifications: Operating temperature: -40 F to 140 F (-40 C to 60 C), Resolution: 1.5F (1C)
Light Sensor
Model LS-R is a solid-state light sensor designed to interface directly with the EL78. It provides
a relative light level to the control (0-100 L).
Computer Software
The Pecosoft.EL software program provides a quick and easy method of programming and
reviewing the EL78 from a personal computer. Programs can be written and stored on the PC
and then loaded into the time control. Programs can also be copied from the time control into
the PC to allow easy review and verification.
Contact Maple Chase Company for further information.
Application Examples
Example No. 1:
Objective: To control an air conditioner to operate at 73 F from 8:00 AM to 12:00 PM and to
operate at 77 F from 12:00 PM to 5:00 PM on Monday through Friday. On nights and weekends
the air conditioner will be off. The air conditioner will also be off from October 1st to April 30th.
Temperature setpoints are to have a +/- 1 F deadband.
Wiring Diagram:
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