Modular time relay | timer | for forward/reverse motor direction control | 1s-100min | 5A | 230VAC | DIN

Cyclic right–left timer relay for two loads – 1 s–100 min, 230 V AC, 5 A, DIN

Electronic cyclic right–left timer relay is designed for alternating control of two electrical loads, contactors or drive directions. When power is applied, the right-direction output is activated first. After the preset operating time has elapsed, it is switched off, the preset pause is observed and the left-direction output is then activated.

The operating duration of the right and left outputs is the same. According to the information supplied by the manufacturer, the time can be adjusted from 1 second to 100 minutes. The R, OFF and L LED indicators allow the right-direction, pause and left-direction operating stages to be monitored.

1. 230 V AC power is connected. The relay begins the alternating control sequence.
2. The RIGHT output is activated. According to the supplied description, contact terminals 2 and 3 are connected.
3. The RIGHT operating time is counted. The R LED indicator flashes and shows the active right-direction stage.
4. The RIGHT output is switched off. When the operating time has elapsed, the circuit between contacts 2 and 3 opens.
5. The OFF waiting time begins. At this time, neither the RIGHT nor the LEFT output is active, and the OFF LED flashes.
6. The LEFT output is activated. After the pause has elapsed, the left-direction relay output is switched on.
7. The LEFT operating time is counted. The L LED indicator flashes and shows the active left-direction stage.
8. The left-direction stage is completed. Further repetition of the sequence depends on the functional diagram of the specific model.

The relay can be used as a timing control element for the forward and reverse contactors of a three-phase motor. In such a system, the relay itself switches only the contactor control circuits.

• two correctly selected direction contactors are required;
• the contactors must be electrically interlocked;
• mechanical interlocking is recommended where required by the design;
• two phases are interchanged in the motor power circuit;
• motor overload protection must be installed;
• short-circuit protection must be provided;
• the OFF pause must be long enough for the mechanism to stop;
• the drive must be suitable for periodic direction reversal.

• Alternating control of two outputs — for two loads or two directions.
• RIGHT → OFF → LEFT sequence — with an intermediate pause between the outputs.
• Equal operating time for both outputs — for a symmetrical cycle.
• 1 s–100 min time range — for short and longer operating intervals.
• R, OFF and L LED indicators — for monitoring each cycle stage.
• 5 A / 250 V AC contacts — for a resistive load.
• 230 V AC supply — for typical control circuits.
• Power consumption below 5 VA.
• DIN-rail mounting.
• Operating temperature from −20 to +55 °C.

• For motor direction control — to activate the forward and reverse contactors alternately.
• In mixing equipment — to change the mixer direction periodically.
• In conveyors — to create forward and reverse movement cycles.
• In gate and mechanical drive systems — when alternating two-direction control is required.
• In two-pump systems — to switch the loads on alternately.
• In ventilation systems — to control two fans alternately.
• In production equipment — for repeating two-action sequences.
• In industrial automation panels — to control two contactors or interposing relays.
• In process lines — when the opposite operation must be performed after one operation and a pause.

For example, a three-phase mixer motor must periodically rotate in the right and left directions. The relay’s RIGHT and LEFT outputs are connected to two mutually interlocked direction contactors.

With the operating time set to 30 seconds, the RIGHT output is activated first when power is switched on. The forward contactor starts the motor and the R LED indicator flashes.

After 30 seconds, the RIGHT output is switched off and the preset OFF pause begins. During this time, the motor is disconnected and has time to stop.

After the pause has elapsed, the LEFT output is activated. The reverse contactor interchanges two motor phases, causing the motor to rotate in the opposite direction.

If the specific model operates cyclically, the sequence starts again after the left-direction operating time.

DIN-rail mounting

• suitable for standard electrical and automation panels;
• the relay must be securely fixed to the DIN rail;
• the mounting location must be dry and protected;
• the terminals must remain accessible for inspection and maintenance;
• adequate clearance must be maintained from components that become very hot;
• the wires must be routed neatly and without tension.

1. Disconnect the supply voltage. The control and power circuits must be completely de-energised.
2. Check the supply parameters. The relay is intended for a 230 V AC, 50 / 60 Hz control circuit.
3. Mount the relay on the DIN rail. Check that it is properly secured.
4. Check the product diagram. Follow the terminal numbering shown on the specific product.
5. Connect the relay power supply. Use conductors with a suitable cross-section.
6. Connect the RIGHT output. Connect it to the first load or the forward contactor control circuit.
7. Connect the LEFT output. Connect it to the second load or the reverse contactor control circuit.
8. Install contactor interlocking. The direction contactors must not be energised simultaneously.
9. Set the operating time. Select the required value from 1 s to 100 min using the product controls.
10. Set the OFF pause. Select a waiting time suitable for the process and the mechanism stopping time.
11. Perform a test without the power load connected. Check the RIGHT, OFF and LEFT sequence.
12. Check the LED indicators. The R, OFF and L indication must correspond to the active cycle stage.
13. Check that the contactors release. Before the opposite direction is energised, the first contactor must be completely de-energised.
14. Perform a trial operating cycle. Observe the motor stopping, direction reversal, current and mechanism operation.

• Completely disconnect the power supply before cleaning.
• Disconnect the relay from the connected circuits.
• Clean the enclosure with a dry, soft swab or cloth.
• Do not use electrically conductive cleaning materials.
• Do not use aggressive chemicals or solvents.
• Do not allow water to enter the terminals or enclosure.
• Check the terminal tightness and the condition of the wires.
• Check the contactor interlocking circuit.
• After maintenance, perform a trial cycle of the complete sequence.

• Use the relay only for its intended purpose and in accordance with the wiring diagram.
• Do not use the relay in a damp environment.
• Disconnect all circuits before installation or maintenance.
• Do not exceed the rated 230 V AC supply voltage.
• Do not connect the motor power circuit directly through the relay.
• Use suitable contactors to control the motor directions.
• The forward and reverse contactors must be interlocked.
• Simultaneous energisation of both direction contactors is prohibited.
• The OFF pause must be long enough for the mechanism to stop.
• The 5 A / 250 V AC rating is specified for a resistive load.
• Contactor coils and solenoids are inductive loads.
• The relay must be installed in a protected electrical enclosure.
• Do not use the device at an altitude above 2000 m above sea level.
• Connection work must be carried out by a qualified electrical specialist.
• Check the complete alternating control sequence before operation.

Quick selection guide

Choose a right–left alternating control timer relay when two loads or two motor direction contactors must be controlled alternately for equal time intervals, with a safe switch-off pause between them.

Alternating control of two loads or motor directions with an adjustable pause

The electronic right–left timer relay is designed to switch two loads or two control directions alternately. When power is connected, the RIGHT output is activated first and is switched off after the preset operating time has elapsed.

After the OFF waiting interval, the LEFT output is switched on. The operating time of both outputs is the same, and the R, OFF and L LED indicators allow the active cycle stage to be monitored.

The relay is supplied with 230 V AC, has 5 A / 250 V AC contacts for a resistive load and is mounted on a DIN rail. It can be used for contactors, interposing relays, two loads or motor direction control circuits.

When the relay is used to reverse the motor direction, correctly selected and mutually interlocked direction contactors, motor protection and a sufficient OFF pause before energising the opposite direction are required.