Product Overview

The ABB 1SBN020314R1000 is the ordering reference for the TEF5-OFF frontal electronic timer, a timing accessory developed for compatible ABB contactor control applications. This device introduces an adjustable delay into an electrical control sequence, allowing an auxiliary contact operation to take place after a selected time interval. It is intended for control circuits in which the timing of a switching event is an important part of the operating sequence.

In industrial automation, contactors are commonly used to control motors, heating equipment, auxiliary loads, and other electrical circuits. Some applications require a switching action to occur immediately, while others need a controlled delay after a change in the contactor’s operating state. An electronic off-delay timer provides this timing function without requiring a separate timing device in every control circuit.

The TEF5-OFF belongs to ABB’s range of frontal electronic timer accessories. Its function is distinct from that of the main contactor: the timer provides a time-dependent auxiliary switching operation, while the contactor performs the associated power-circuit switching. Correct selection depends on the contactor family, the intended control sequence, and the electrical requirements of the application.

Operating Principle of the TEF5-OFF

The TEF5-OFF is an off-delay timer. This operating mode is used when a control action needs to be maintained for a defined period after the initiating condition changes. Instead of completing the associated auxiliary switching operation immediately, the timer introduces a delay determined by its selected time range and adjustment setting.

In a typical control sequence, a contactor changes state as part of a machine or electrical system operation. The timing accessory responds according to its operating principle and controls the timing of its auxiliary contacts. The resulting delay can help coordinate related control actions, maintain a temporary control condition, or establish a defined interval between switching events.

The exact sequence depends on the contactor arrangement, wiring configuration, and the circuit in which the timer is installed. Designers should therefore consult the applicable ABB installation instructions before assigning terminal functions or defining the expected behavior of the complete control system.

Adjustable Timing Ranges

One important feature of the ABB 1SBN020314R1000 is its selection of three timing ranges. The available ranges are 0.1 to 1 second, 1 to 10 seconds, and 10 to 100 seconds. These ranges allow the accessory to accommodate control sequences with different timing requirements, from short switching intervals to longer delays.

• 0.1–1 second: Suitable for control sequences requiring a short delay between related switching events.
• 1–10 seconds: Provides an intermediate range for applications requiring a longer controlled interval.
• 10–100 seconds: Supports applications in which the delayed auxiliary operation must occur over a longer period.

The appropriate range should be selected according to the required sequence and the limits specified in the manufacturer’s documentation. A suitable range helps provide the necessary adjustment resolution while avoiding an unnecessarily broad timing interval. Actual timing settings should be verified during commissioning as part of the complete control-system validation process.

Auxiliary Contacts and Control Circuit Integration

The TEF5-OFF incorporates one normally open auxiliary contact and one normally closed auxiliary contact. These contact configurations provide flexibility when designing control logic. Depending on the circuit arrangement, they can be used to support interlocking, status-dependent control, sequencing, or other auxiliary functions associated with contactor operation.

A normally open contact is open in its defined normal state and closes when the contact mechanism operates. A normally closed contact behaves in the opposite manner. Their actual behavior within a timing sequence must be interpreted using the manufacturer’s terminal diagram and the operating state of the installed device.

These auxiliary contacts are intended for control-circuit functions rather than direct replacement of the contactor’s main power contacts. Engineers should assess the applicable AC-15 or DC-13 utilization category, rated operational current, circuit voltage, and switching duty before connecting an external load.

Electrical Characteristics

The ABB TEF5-OFF is designed for auxiliary control applications and has defined electrical ratings that should be considered during equipment selection. The published technical information specifies a 50/60 Hz auxiliary-circuit frequency and a rated insulation voltage of 400 V according to IEC 60947-5-1, with a 300 V rating according to UL/CSA requirements.

Its conventional free-air thermal current is 5 A at an ambient reference temperature of 40°C. For AC-15 utilization, the rated operational current is 3 A at 24/127 V and 1.5 A at 220/240 V. For DC-13 utilization, the specified rating at 24 V is 1 A, corresponding to 24 W.

The published short-time withstand current is 8 A for 0.1 seconds and 8 A for 1 second under the stated conditions. These values should not be interpreted as permission to operate a circuit continuously at the short-time withstand rating. The correct design must account for the relevant utilization category, protective devices, wiring, and applicable standards.

The accessory uses screw terminals for electrical connections. Correct conductor preparation, secure terminal tightening, and compliance with the installation instructions are important for dependable operation. The published auxiliary-circuit terminal tightening torque is 1 N·m. Always confirm the applicable documentation and terminal requirements before installation.

Compatibility and Installation Considerations

Compatibility is a key consideration when selecting the ABB 1SBN020314R1000. The TEF5-OFF is intended for designated ABB contactor and contactor-relay applications. Product documentation identifies compatible equipment families within the A, AL, AE, AX, N, NL, and NX ranges, subject to the specific model and installation arrangement.

Compatibility should never be determined solely by physical appearance or by the fact that two products belong to the same manufacturer. Before ordering or installing the timer, confirm the contactor model, accessory mounting arrangement, terminal configuration, and applicable installation instructions. This is particularly important when maintaining older equipment or replacing an accessory in an established control panel.

Installation should be performed by qualified personnel with the circuit isolated and appropriate electrical safety procedures followed. The timer must be installed and connected according to the relevant ABB documentation. After installation, the control sequence should be checked to confirm that the selected delay, auxiliary contact operation, and associated contactor behavior meet the intended application requirements.

Applications in Industrial Automation

The ABB TEF5-OFF can be considered for industrial control arrangements that require an off-delay function in a compatible contactor circuit. Potential applications include machine control panels, auxiliary switching sequences, motor-control arrangements, and electrical systems where one control event must follow another after a defined interval.

In machinery, a delayed auxiliary operation may help coordinate control signals between operating stages. In electrical panels, timing functions can contribute to the sequencing of contactors and associated control devices. In maintenance and equipment modernization projects, a correctly specified timer can also help preserve an existing control sequence when an accessory requires replacement.

These examples describe general application possibilities rather than a guarantee of suitability for every installation. The actual use depends on circuit design, the connected equipment, operating conditions, and the relevant electrical standards. Safety-related functions must use appropriately designed and certified components rather than relying on a general-purpose timing accessory alone.

Selection and Maintenance Guidelines

When specifying the ABB 1SBN020314R1000, begin by confirming the complete ordering reference and the TEF5-OFF product designation. Next, verify the compatible contactor, the required delay range, the auxiliary contact arrangement, and the electrical ratings of the control circuit. These checks help prevent selection errors and reduce the risk of incompatibility during installation.

For an existing control panel, it is useful to review the wiring diagram and identify the purpose of the original timer before replacement. The required delay should be established from the machine sequence or control specification rather than estimated from the appearance of the installed accessory. Where the existing configuration is unclear, obtain the applicable technical documentation before making changes.

Maintenance activities should include appropriate isolation procedures, inspection of terminal connections, and verification of the control sequence. If the timing behavior changes unexpectedly, investigate the wiring, contactor operation, adjustment setting, and surrounding control circuit. Any troubleshooting or adjustment should follow the manufacturer’s instructions and the site’s electrical safety procedures.

Product Summary

The ABB 1SBN020314R1000 TEF5-OFF is a frontal electronic off-delay timer intended for compatible ABB contactor control systems. Its three selectable timing ranges, one normally open auxiliary contact, one normally closed auxiliary contact, and screw-terminal connections make it a practical component for time-dependent control sequences.

By providing a defined delay in an auxiliary switching operation, the timer supports the coordination of electrical control functions in industrial machinery and automation panels. Proper application requires attention to contactor compatibility, circuit ratings, terminal connections, and the timing requirements of the complete installation.

For accurate product selection, maintenance planning, or equipment replacement, the full model reference and the applicable ABB technical documentation should be used together. This approach helps ensure that the TEF5-OFF is selected for the intended control function and installed within its specified operating limits.