German DEUFRA plug DEUFRA model DEUFRA price

DEUFRA plug is a control module that can output a signal or provide a discrete on/off signal to actuate controlled equipment when control is required, while also receiving feedback signals from the equipment to report to the host. It is an important component of fire alarm linkage systems. Input/output modules available on the market can provide a pair of passive normally open/normally closed contacts to control the equipment. Some manufacturers' modules can be configured via parameters for active output (e.g., GST GST-LD-8301). Corresponding variants include dual input/output modules and multi-input/output modules. During a fire alarm, the alarm controller activates external devices requiring linkage via output modules, such as smoke exhaust valves, air supply valves, fire shutters, fans, and alarm bells, and can receive action confirmation from the devices. The output module is connected to the controller's loop bus and can be installed near the controlled equipment or inside the floor terminal module box. Electronic coding allows on-site addressing. The output control logic of the output module can be programmed according to project requirements. When the controller receives an alarm signal from a detector, it sends linkage control signals to the output module via the bus according to the pre-programmed procedure; the output module then activates the linked fire protection equipment. After the device acts, a confirmation signal is received.

DEUFRA plug composition

The fieldbus control system consists of three parts: measurement system, control system, and management system, with the hardware and software of the communication part being its most distinctive feature. 1) Fieldbus control system: Its software is an important part of the system. Control system software includes configuration software, maintenance software, simulation software, device software, and monitoring software. First, select development configuration software and human-machine interface software for control operations. Through the configuration software, complete the connections between function blocks, select function block parameters, and perform network configuration. During network operation, the system collects data in real time, processes data, and performs calculations. It optimizes control and logical control, alarms, monitoring, display, reports, etc. 2) Fieldbus measurement system: Its characteristics include multi-variable high-performance measurement, giving measuring instruments additional functions such as computing capability. Due to the use of digital signals, it offers high resolution, high accuracy, strong anti-interference, and strong anti-distortion capabilities. It also provides status information of instrument equipment, allowing adjustment of the processing process. 3) Equipment management system: It can provide diagnostic information, management information, equipment operating status information (including smart instruments), and equipment manufacturing information provided by manufacturers. For example, Fisher—Rosemoune Company launched the AMS management system. Installed in the main computer, it performs management functions and can form a comprehensive management system information library for field devices. Based on this, equipment reliability analysis and predictive maintenance are realized, changing passive management into a predictable management and maintenance mode. The AMS software is based on a T architecture with the field server as the platform. Supporting modular, feature-rich application software on the field server provides users with a graphical interface. 4) Bus system computer service mode: The client/server mode is a popular network computer service mode. The server represents the data source (provider), and the application client represents the data user, which obtains data from the data source and further processes it. The client runs on a PC or workstation. The server runs on a minicomputer or mainframe, using the intelligence, resources, and data of both parties to complete tasks. 5) Database: It can organically and dynamically store large amounts of data and applications, achieving full data sharing and cross-access with high independence. Industrial equipment parameters change continuously during operation, resulting in large data volumes and high real-time requirements for operation and control. Therefore, a distributed and real-time database system capable of mutual access and operation has been formed. Mature options on the market include relational databases such as Oracle, sybas, Informix, SQL Server; and real-time databases such as Infoplus, PI, ONSPEC. 6) Network system hardware and software: Network system hardware includes system management hosts, servers, gateways, protocol converters, hubs, user computers, and underlying intelligent instruments. Network system software includes network operating software such as NetWarc, LAN Mangger, Vines; server operating software such as Lunix, os/2, Window NT; application software databases, communication protocols, network management protocols, etc.

DEUFRA plug classification

1) By shape: circular electrical connectors and rectangular electrical connectors. Circular electrical connectors are used most extensively in military equipment (aviation, aerospace) due to their structural characteristics. Rectangular electrical connectors are more commonly used on printed circuit boards of electronic devices due to their simple structure. 2) By structure: By connection method: threaded connection, bayonet (quick) connection, latch connection, push-pull connection, direct insertion connection, etc.; By contact termination form: crimping, soldering, wire wrapping; screw (cap) fixation; By environmental protection: environmentally resistant electrical connectors and ordinary electrical connectors. 3) By application: RF electrical connectors, sealed electrical connectors (glass-to-metal seal), high-temperature electrical connectors, automatic disconnect/separation electrical connectors, filter electrical connectors, composite material electrical connectors, airport power electrical connectors, printed circuit board electrical connectors, etc.

DEUFRA plug wiring method

1) Apply moderate force when tightening connections to prevent stripping the threads of bolts and nuts due to excessive force. Replace any stripped bolts and nuts immediately; do not proceed with compromised components. 2) When using a screwdriver to tighten or loosen screws, apply firm pressure to keep the screwdriver engaged with the screw head before tightening or loosening to prevent slipping, which can damage the screw and make disassembly difficult, especially for common circuit breakers in distribution boxes. 3) If bolts and nuts are difficult to remove, do not act rashly to avoid deformation that makes removal even harder. Tap appropriately or apply screw loosening agents or dilute hydrochloric acid, then attempt removal after a short wait. 4) Do not use pliers to tighten or loosen bolts and nuts to prevent damage. When using an adjustable wrench, adjust the jaw opening properly to prevent damaging or deforming the bolts and nuts, which would make disassembly difficult. 5) A single terminal block allows connection of at most two wires of the same type and specification. 6) For terminal blocks prone to loosening or poor contact, wire ends must be fastened in a "U" shape to the terminal block to increase contact area and prevent loosening. 7) When connecting wire ends or lugs to each other, do not install non-copper or poorly conductive washers in between. 8) When connecting wire ends, the contact surface must be smooth and free of oxidation. When connecting lugs or copper bars, clean the contact surface, apply conductive paste, and then tighten. 9) When connecting temporary lines, single-strand flexible wires should have their ends folded once before connecting to the lower terminal of the circuit breaker; single-core solid wires should be connected to the lower terminal of the circuit breaker in a "U" shape. 10) For motor wiring of 30KW and above, do not install poorly conductive washers (such as galvanized nuts, flat washers, spring washers, etc.) between the motor leads and the cables connecting to the motor. 11) When wrapping cables or other equipment requiring insulation protection with insulating tape, wrap from one end to the other with a 1/2 overlap ratio, making at least one round trip.

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