Pilz 750134 safety relay in stock

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PILZ 774318 (PNOZ X3 230VAC 24VDC) is a universal safety relay in the PNOZ X series. Its core features include 3 safety normally open contacts, 1 auxiliary normally closed contact, and 1 semiconductor output. It is compatible with both AC and DC power supply modes and adopts a compact modular design, with high anti-interference, high reliability, and flexible adaptability. It strictly complies with EN 60204-1, EN 60947-5-1, ISO 13849-1 PL e/Cat. 4, IEC 61508 SIL 3 safety standards and is designed for harsh working conditions such as high temperature, high dust, strong electromagnetic interference, and multi equipment linkage in the metallurgical industry. It is widely used in the entire production process of ironmaking, steelmaking, steel rolling, and non-ferrous metal smelting. The core control components of the safety circuit in the metallurgical industry provide reliable guarantees for personnel, equipment, and production continuity, and are suitable for the safety interlocking requirements of various high-risk equipment in the metallurgical industry.

1、 Core technical parameters (adapted to metallurgical industry working conditions)

1. Basic electrical and structural parameters

The model is 774318 (PNOZ X3 230VAC 24VDC 3n/o 1n/c 1so), with a power supply voltage compatible with 230V AC and 24V DC dual-mode, meeting the needs of different power supply scenarios in metallurgical workshops. The power consumption is 2.5W, and the allowable voltage fluctuation range is -15%/+20%, suitable for unstable voltage conditions in workshops. The input configuration is dual channel independent input, compatible with normally open and normally closed contact type safety devices, supports short circuit detection between contacts, and can be directly connected to various safety components such as emergency stop buttons, safety door switches, gratings, limit switches, etc., to meet the diverse safety signal access requirements of metallurgical equipment.

The output configuration includes 3 safety normally open contacts, 1 auxiliary normally closed contact, and 1 semiconductor output, with contact specifications of AC15 240V/5A and DC13 24V/4A. It adopts a forced guiding structure to eliminate the risk of contact adhesion and can directly control the safety circuit of a single core equipment or multiple auxiliary equipment. The semiconductor output can achieve signal isolation and status feedback, and is suitable for complex control logic in the metallurgical industry. The physical size is 22.5mm ultra-thin width, installed on a 35mm DIN rail, and designed with pluggable screw terminals for easy installation, wiring, and maintenance, saving control cabinet space.

The working temperature range is -10~55 ℃, the protection level is IP20 (terminal)/IP40 (shell), the anti vibration is 10-55Hz/0.35mm, and the anti electromagnetic interference ability meets the EN 55011 standard. It can adapt to the harsh environment of high temperature, dust, vibration, and strong electromagnetic radiation in metallurgical workshops, and has a certain degree of anti-corrosion ability. It can adapt to the corrosive working conditions of non-ferrous metal smelting workshops to ensure long-term stable operation.Pilz 750134 safety relay in stock

2. Core parameters of security performance

Compliant with international safety standards such as EN 60204-1, EN 60947-5-1, ISO 13849-1, IEC 61508, etc., the safety level reaches ISO 13849-1 PL e/Cat. 4, IEC 61508 SIL 3, meeting the safety control requirements of high-risk equipment in the metallurgical industry. Built in full cycle self detection function, real-time monitoring of input short circuits, contact adhesion, channel faults, power supply abnormalities, etc. Once a fault is detected, the safety output is immediately cut off, the equipment is forced to shut down, dangerous outputs are eliminated, and safety accidents are avoided from expanding.

Input output response time ≤ 20ms, suitable for high-speed shutdown requirements of metallurgical equipment, can quickly cut off hazardous energy, avoid equipment damage, material loss, and personnel injury. Supports two modes of manual reset and monitoring reset, which can be flexibly configured according to on-site safety logic. After troubleshooting, the reset operation must be completed before the device can be restarted, ensuring on-site safety and controllability. The panel integrates power, channel, output, and fault LED indicator lights to visually display the device's working status and fault type, making it easy for on-site operation and maintenance personnel to quickly troubleshoot problems and shorten downtime due to faults.

2、 Core application scenarios in the metallurgical industry

1. Ironmaking workshop: safety control of blast furnace and auxiliary equipment

PILZ 750134 (PNOZ s5 24VDC) is a classic safety relay in the Pilz PNOZ sigma series. It is positioned as a universal safety control component and integrates multiple safety protection mechanisms. With stable electrical performance, flexible control logic, and high safety levels, it is widely used in various industrial automation scenarios. Compared with ordinary relays, its core advantage lies in the ability to make regular actions in the event of a fault. By forcibly guiding the contact structure to eliminate the risk of contact adhesion, it ensures the safety of personnel and equipment from the root. Its performance parameters and working principles are in line with the harsh industrial conditions, making it the core equipment for achieving safety interlocking. The following provides a detailed analysis based on product characteristics, with strict word count control throughout the text to ensure accuracy and detail.

1、 Core Performance of PILZ 750134 Safety Relay

The performance advantages of PILZ 750134 are mainly reflected in three dimensions: safety and reliability, electrical stability, and flexible adaptability. All parameters comply with international safety standards and are suitable for complex working conditions in industrial sites, as follows:

### 1. Security performance (core advantage)

This relay strictly complies with international safety standards such as EN 60204-1, EN 60947-5-1, ISO 13849-1, IEC 61508, etc., with a safety level of ISO 13849-1 PL e/Cat. 4 and IEC 61508 SIL 3, making it the preferred component for safety control of high-risk equipment. Built in full cycle self detection function, real-time monitoring of various hidden dangers such as input short circuits, contact adhesion, channel faults, power supply abnormalities, etc. Once a fault is detected, the safety output is immediately cut off, the equipment is forced to shut down, dangerous outputs are eliminated, and safety accidents are prevented from expanding. This feature is different from ordinary relays and is also the core value of safety relays.

By adopting a forced guiding contact structure, safety can be ensured even in the event of contact melting. The risk of misoperation caused by adhesion of ordinary relay contacts is reduced. The contact material is made of AgCuNi gold-plated material with a thickness of 0.2 μ m, ensuring low current conduction reliability and avoiding problems such as contact oxidation and poor contact. Supporting dual channel redundant input design, it can achieve multiple operation modes of single channel and dual channel, and can detect ground faults, input circuit short circuits, and contact short circuits in the starting and input circuits, further enhancing safety redundancy.

2. Electrical performance

The power supply voltage is 24V DC, with an allowable voltage fluctuation range of -15%/+20%. It is suitable for unstable voltage conditions in industrial workshops, with a power consumption of only 2W. It is energy-saving, reduces equipment heating, and extends the service life. The input configuration supports the connection of normally open and normally closed contact type safety devices, which can directly interface with emergency stop buttons, safety door switches, gratings and other safety components. It supports short circuit detection between contacts, stable signal transmission, and error free triggering.

The output configuration includes 2 safety normally open contacts and 1 auxiliary normally closed contact, with contact specifications of AC15 240V/5A and DC13 24V/4A. It can directly control the main contactor coil of the equipment and is compatible with conventional industrial control circuits. The input-output response time is ≤ 20ms, which can quickly cut off hazardous energy, adapt to the safe shutdown requirements of high-speed equipment, and avoid equipment damage and material loss. The anti electromagnetic interference capability meets the EN 55011 standard and can resist electromagnetic radiation generated by industrial field frequency converters, motors, and other equipment, avoiding misoperation.

3. Environment and structural performance

The physical size is 22.5mm ultra-thin width, installed vertically with 35mm DIN rails, and designed with pluggable screw terminals for easy installation, wiring, and later maintenance, saving control cabinet space and adapting to the integration needs of small control cabinets. The working temperature range is -10~55 ℃, the humidity is ≤ 93% RH (no condensation), the protection level is IP20 (terminal)/IP40 (shell), the anti vibration is 10-55Hz/0.35mm, and it can adapt to harsh environments such as dust, temperature changes, and vibrations in industrial sites. The average time is much longer than conventional relays, ensuring long-term stable operation.

The panel integrates power, channel, output, and fault LED indicator lights to visually display the device's working status and fault type, making it easy for operation and maintenance personnel to quickly troubleshoot problems and shorten downtime. Supports two modes of manual reset and monitoring reset, which can be flexibly configured according to on-site safety logic. It also has multiple control methods such as automatic start and monitoring start edge, adapting to the safety control needs of different scenarios. It can also be connected to contact expansion modules through connectors to increase the number of contact points and improve adaptability.

2、 Working principle of PILZ 750134 safety relay

The working principle of PILZ 750134 is based on electromagnetic induction and safety circuit interlocking logic. The core is to achieve equipment safety monitoring through closed-loop control of "signal detection logic judgment safety output". Its essence is composed of several relays and circuits combined to complement each other's abnormal defects and achieve complete safety functions with low misoperation. It can be divided into three core links, which are explained in detail based on internal structure and control logic:

1. Power supply and initialization principle

Before the relay works, it needs to be connected to a 24V DC power supply. After the power terminals A1 and A2 are connected, the internal electromagnetic coil is powered on and starts the initialization self-test. This is a key step that distinguishes safety relays from ordinary relays. During the self check process, the internal circuit will check the stability of the power supply voltage, contact status, and input channel continuity one by one. If all parameters are normal, the panel power indicator light (PWR) will light up, and the relay will enter the ready state, which can receive external safety signals; If faults such as abnormal power supply or contact adhesion are detected, the fault indicator light (FAULT) will remain on, the relay will lock the output, and the device will be prohibited from starting until the fault is resolved.

2. Input signal detection and logic judgment principle

The relay adopts a dual channel input design, with two input channels connected to external safety components (such as emergency stop buttons and safety door switches) to form a redundant safety circuit, ensuring that safety control can still be achieved in the event of a single channel failure. During normal operation, the external safety components are in a closed state, the input channel signal is conductive, and the internal detection circuit monitors the signal synchronization and continuity of the two channels in real time. This design can effectively prevent safety hazards caused by short circuits or open circuits in a single channel.

When an abnormality occurs in the device (such as pressing the emergency stop button or opening the safety door), the corresponding input channel signal is disconnected, and the internal logic judgment circuit immediately recognizes the fault signal and quickly triggers the safety protection mechanism. The core of the logic judgment circuit is to determine the validity of the input signal through a comparator and trigger. If any channel signal is detected to be abnormal, out of sync, or if there is a ground fault or short circuit between contacts, it is immediately judged as a dangerous state and an instruction to cut off the output is issued. The entire judgment process takes ≤ 10ms to ensure fast response.

3. Output control and fault reset principle

The output circuit is divided into safety output and auxiliary output. The safety output directly controls the main power circuit of the equipment, while the auxiliary output is used for status feedback or fault alarm. During normal operation, the logic judgment circuit outputs a valid signal, the internal electromagnetic coil remains energized, the safety normally open contact is closed, the main circuit of the equipment is conductive, and the equipment operates normally; The auxiliary normally closed contact is disconnected, and the fault alarm circuit is not working.