ENDA ATRL02-UV is an analog right-left rotation timer relay designed for automatic alternating control of reversible motors and industrial mechanisms. It provides two separate relay outputs and adjustable operating and pause periods between direction changes.

The UV version operates from 90-250V AC, 50/60Hz and is suitable for standard 230V industrial control panels. Its compact 18 mm housing mounts directly on a TH35 DIN rail.

Operating principle

The timer uses two outputs:

• OUT1 for one operating direction;
• OUT2 for the opposite direction.

The ton setting determines the operating duration of OUT1 and OUT2, while toff determines the relay-off interval between direction changes.

A typical sequence is:

right rotation -> pause -> left rotation -> pause -> repeat

This provides automatic alternating motion without requiring a PLC for the basic timing sequence.

Selectable timing units

Six timing units are available:

• seconds
• 10 seconds
• minutes
• 10 minutes
• hours
• 10 hours.

The analog scale is adjustable between 0 and 1.

Main technical specifications

• Manufacturer: ENDA
• Model: ATRL02-UV
• Type: analog right-left timer relay
• Supply: 90-250V AC +/-10%, 50/60Hz
• Function: alternating right-left control
• Outputs: 2 relays
• OUT1: 250V AC, 10A resistive, NO+NC
• OUT2: 250V AC, 10A resistive, NO+NC
• ton: OUT1 / OUT2 operating duration
• toff: relay OFF interval
• Timing units: S, 10S, M, 10M, H, 10H
• Scale: 0...1
• Reset time: maximum 0.04 seconds
• Maximum power consumption: 10VA
• Mounting: TH35 DIN rail
• Dimensions: 18 x 90 x 66 mm
• Screw-terminal connection
• Protection: IP20
• Operating temperature: 0...+50 C
• Storage temperature: -25...+70 C
• Self-extinguishing plastic enclosure
• CE marked according to European standards.

Typical applications include reversible motors, mixers, agitators, packaging machinery, alternating movement mechanisms and industrial control panels.

For motor reversing applications, the relay outputs should normally control properly rated forward and reverse contactors with suitable electrical and mechanical interlocking.