ABB 55.34.9.024.0040 Timer Relay

ABB 55.34.9.024.0040 Timer Relay

Product Overview

55.34.9.024.0040 belongs to the ABB 55 series timer relay, which is designed with the concept of "industrial grade timing accuracy and multi-mode adaptation". As the timing core component in the control circuit, its core function is to receive 24V DC control signals and accurately control the time node of contact action according to preset delay parameters or cycle modes, achieving delayed start, delay stop or cycle on/off control of subsequent loads. Through timing control, it is possible to coordinate the operation sequence of multiple devices, avoid overlapping starting currents, and achieve intermittent work requirements. At the same time, the electrical isolation between coils and contacts is utilized to protect the front-end control circuit. This relay can seamlessly cooperate with ABB contactors, power relays, wiring terminals, and other components to build an efficient and orderly automation control system.

Core technical parameters

Technical parameters are the core basis for selecting and debugging timer relays. The key parameters of 55.34.9.024.0040 are as follows. In practical applications, please refer to ABB's official product manual:

1. Control circuit parameters: The rated control voltage (Uc) is DC 24V, suitable for industrial control mainstream low-voltage DC power supply; The rated current (Ic) of the coil is about 50mA-150mA, the coil power is ≤ 3W, and the energy consumption is relatively low; The control signal triggering method supports multiple modes such as "power on delay", "power off delay", "cycle delay", etc. The triggering voltage range is 85% -110% Uc, ensuring stable triggering during voltage fluctuations and avoiding misoperation.

2. Delay performance parameters: The delay range can be adjusted through knobs or dials, usually ranging from 0.1s-10min (some modes support longer delays), with a delay accuracy of ≤± 5% (at room temperature), meeting the timing control requirements of most industrial scenarios; Delay mode supports monostable (such as maintaining contact state after power on delay) and bistable (such as cyclic on-off), which can be switched through panel dialing or external signals.

3. Output contact parameters: The contact form is usually 1 or 2 sets of conversion contacts (1C/O or 2C/O), with a rated operating voltage (Ue) of AC 230V/400V or DC 24V/110V, suitable for AC/DC loads; The rated working current (In) is 10A-16A (resistive load), which can directly drive small and medium-sized motors, solenoid valves, and other loads, or control contactor coils; Contact electrical life (under rated load) ≥ 100000 times, mechanical life ≥ 1 million times.

4. Environment and isolation parameters: The working environment temperature range is -25 ℃~+70 ℃, which can adapt to high and low temperature industrial scenarios; The protection level of the shell is IP40, effectively preventing dust and small particles from entering; The insulation resistance between the coil and the contact is ≥ 100M Ω, the insulation voltage (Ui) is ≥ 2.5kV AC, the isolation performance is excellent, and the anti electromagnetic interference (EMI) meets the IEC 61000 standard.

Structural characteristics and core advantages

1. Precise and stable timing control structure

The relay adopts a digital delay control chip, combined with high-precision RC oscillation circuit or crystal oscillation circuit, to ensure that the delay accuracy is not affected by environmental temperature and voltage fluctuations; Internally equipped with independent delay triggering and contact driving circuits to avoid mutual interference between control signals and output circuits; The panel is equipped with clear delay adjustment knobs/dials and mode selection switches, with an intuitive adjustment range and convenient debugging. Parameter settings can be completed without the need for professional tools.

2. Multi mode adaptation and flexible expansion

According to the timing requirements of different industrial scenarios, relays are equipped with multiple delay modes, such as power on delay (TON), power off delay (TOFF), interval delay (PULSE), cycle delay (CYCLE), etc., which can be quickly switched through panel settings; Some models support external signal reset function, which can immediately terminate the current delay process and restore the initial state when receiving the reset signal, improving control flexibility; At the same time, relays support linkage with devices such as PLCs and sensors, and can trigger delayed actions through external signals to adapt to complex automation control logic.

3. Industrial grade anti-interference and safety design

The shell is made of high-strength flame-retardant engineering plastic with a flame-retardant rating of UL94 V-0, which can withstand instantaneous high temperatures and mechanical impacts in industrial environments; The coil is equipped with freewheeling diodes at both ends to absorb the reverse electromotive force generated during power failure, protecting semiconductor components such as front-end PLC output modules and transistors; The contact is made of silver alloy material and equipped with a magnetic blow out arc device, which can quickly extinguish the arc generated during disconnection and extend the service life of the contact; The internally optimized wiring structure improves the creepage distance and electrical clearance, effectively resisting electromagnetic interference in industrial sites and ensuring precise and reliable delay actions.

4. Convenient installation and status visualization

Adopting standardized installation methods, supporting 35mm DIN rail installation (with dedicated base) or panel embedded installation, adapting to different control cabinet layout requirements; The terminal block adopts a crimping design, supporting 0.5mm ² -2.5mm ² hard/soft wire connection, with clear terminal identification (control end, power end, output end) to avoid wiring errors; The panel is equipped with LED status indicator lights, which respectively indicate the status of power on/off, delayed progress, contact action, etc. The operation and maintenance personnel can intuitively judge the working status of the relay and quickly troubleshoot faults through the indicator lights.

Applicable scenarios and typical applications

Based on its 24V DC control, multi-mode delay, and precise timing characteristics, the 55.34.9.024.0040 timer relay is widely used in various industrial timing control scenarios, with typical applications including:

-Industrial automation production line: Start stop delay control of the conveyor belt on the assembly line (to avoid confusion in the connection between the front and back processes), pre ventilation delay of the painting equipment (to ensure proper ventilation before work), preheating delay of the heating equipment (to prevent dry burning), to improve production efficiency and safety through timing coordination.

-In the field of mechanical equipment: tool change delay for CNC machine tools (to ensure stable spindle stop before tool change), sealing delay for packaging machinery (to ensure stable sealing pressure), and pressure holding delay for injection molding machines (to improve product forming quality), to achieve orderly action of various actuators in the equipment.

-Power distribution and motor control: sequential start-up control of multiple motors (to avoid grid fluctuations caused by overlapping start-up currents), delayed shutdown of cooling fans after motor shutdown (to ensure sufficient cooling of motors), delayed switching of backup power supply automatic activation (to avoid momentary power outages and accidental triggering), ensuring stable operation of the power distribution system.

-Building automation and security: delayed start of central air conditioning fans (linked with water pumps), delayed shutdown of emergency lighting in stairwells (automatically turned off after personnel leave), alarm delay of security systems (to avoid immediate alarm after accidental contact, with reserved processing time), adapted to the needs of building intelligence.

-In the field of environmental protection and chemical engineering: aeration cycle control of sewage treatment equipment (intermittent aeration energy-saving), stirring delay of chemical reaction kettle (ensuring sufficient mixing of raw materials), pre start delay of waste gas treatment equipment (synchronized operation with production equipment), to meet the process timing requirements.

Key points for installation and maintenance

1. Installation precautions

-Before installation, it is necessary to confirm that the relay model, control voltage (DC 24V), delay mode, and contact capacity match the actual requirements. Check that the housing is not damaged, the terminals are not oxidized, and the panel knobs/dials are flexible.

-The installation location should be away from heat sources (such as heaters, power resistors), strong magnetic fields (such as large transformers, contactors), and corrosive gases, avoiding direct sunlight and ensuring good ventilation. A minimum of 5mm heat dissipation gap should be reserved around the relay to prevent high temperatures from affecting the delay accuracy.

-When installing with DIN rails, it is necessary to ensure that the rails are firmly fixed and the relay base is not loose after being inserted; Before wiring, it is necessary to disconnect the control circuit from the power supply, strictly distinguish between the power supply terminal (DC 24V positive and negative poles), the control terminal (trigger signal), and the output terminal (load connection), and avoid the positive and negative poles being reversed and burning the relay.

-The selection of wires should match the current specifications: 0.75mm ² -1.5mm ² copper wires are selected for the control circuit and power circuit, and 2.5mm ² -4mm ² copper wires are selected for the output circuit according to the load current; After wiring, tighten the terminal screws to prevent false connection and heat generation. The stripping length of the wire should be moderate (6-8mm) to avoid insulation layer entering the terminal or bare wire exposure.

-After installation, it is necessary to check whether the panel mode settings and delay parameters comply with the control logic to ensure that there are no parameter setting errors.

2. Daily maintenance and troubleshooting

-Regular inspection: Clean the surface dust of the relay regularly every month and check whether the panel indicator light is normal; Check the wiring terminals quarterly for looseness, overheating, and discoloration, and tighten the screw terminals; Verify the delay accuracy through practical operation. If the deviation exceeds ± 10%, parameter calibration or replacement is required.

-Parameter calibration: If the delay accuracy decreases, you can refer to the product manual, compare it with a standard timer, and adjust the delay knob/dial on the panel for calibration; Before calibration, it is necessary to ensure that the control voltage is stable within the range of DC 24V ± 5% to avoid voltage fluctuations affecting the calibration results.

-Coil and contact inspection: After power failure, measure the coil resistance with a multimeter. The standard value is usually 150 Ω -500 Ω (refer to the manual for details). If the resistance is abnormal (far greater than or close to 0), it indicates that the coil is aging or short circuited, and the relay needs to be replaced; When checking the contacts, the continuity test can be used to determine whether the contact is good. If the contact is poor, the contacts need to be cleaned or the relay needs to be replaced.

-Common troubleshooting: If the relay does not have a delayed action, it is necessary to check whether the power supply is normal, whether the control signal is triggered, and whether the mode setting is correct; If the delay accuracy deviates significantly, it is necessary to check whether the ambient temperature exceeds the range or if there is a malfunction in the internal timing component; If the contact cannot be engaged or disconnected, it is necessary to check whether the load is overloaded or the contact is welded, replace the relay in a timely manner, and handle the load fault.