German Fixtest plug Fixtest model Fixtest price

Fixtest plug is a control module that can output signals or provide a digital 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 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). Correspondingly, there are also dual input/output modules, multi-input/output modules, etc. During a fire alarm, the alarm controller activates external devices requiring linkage, such as smoke exhaust valves, air supply valves, fire shutters, fans, and sirens, through the output module, and can receive action acknowledgments 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 block box. Electronic coding allows for 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 transmits the linkage control signal to the output module via the bus according to the pre-programmed procedure. The output module then activates the fire protection equipment requiring linkage; after the device acts, an acknowledgment signal is received.

Fixtest plug introduction

Fieldbus is an open interconnection network that can interconnect with networks at the same layer or different layers, and can also achieve shared network databases. Fieldbus embodies the characteristics of distribution, openness, interconnection, and high reliability, which are precisely the shortcomings of DCS systems. DCS typically transmits signals one-to-one; the analog signals used have low precision and are susceptible to interference. Operators in the control room often find it difficult to adjust parameters and predict faults with analog instruments, leaving them in an 'out of control' state. Many instrument manufacturers define their own standards, resulting in poor interchangeability. Instrument functions are relatively single-purpose and difficult to meet modern requirements, and almost all control functions are located in the control station. FCS, on the other hand, adopts one-to-many bidirectional signal transmission. The digital signals used have high precision and strong reliability. Equipment remains under the remote monitoring and controllable state of the operator at all times. Users can freely choose devices from different brands and types for interconnection as needed. Smart instruments have rich functions such as communication, control, and computation, and control functions are distributed among various smart instruments. Thus, we can see the significant progress of FCS compared to DCS. It is precisely due to the above characteristics of FCS that it has great advantages in design, installation, commissioning, and normal production: First, since intelligent devices at the front end can perform more complex tasks, separate controllers and computing units are no longer needed, saving hardware investment and footprint; FCS wiring is relatively simple, and multiple devices can be connected to a single transmission line, greatly saving installation costs; since field control devices often have self-diagnostic functions and can send fault information to the control room, maintenance work is reduced; meanwhile, users have a high degree of autonomy in system integration and can flexibly select suitable products from manufacturers; the overall system reliability and accuracy are also greatly improved. All this helps users reduce installation, usage, and maintenance costs, ultimately achieving the goal of increasing profits.

Fixtest plug features

Field control devices feature communication capabilities, facilitating the construction of the plant's lower-level control network. The openness and consistency of communication standards ensure system openness and interoperability between devices. Standardization of function blocks and structures enables interchangeability among devices with identical functions. Decentralizing control functions to the field level provides a highly distributed control system architecture. Fieldbus technology integrates automation devices and systems into information networks, expanding their application scope; multiple control devices can be connected on a single twisted-pair cable, reducing installation costs; lowering maintenance expenses; enhancing system reliability; and providing users with greater flexibility in system integration.

Fixtest 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, ensure the screwdriver tip fits tightly against the screw head before applying force to prevent slipping, which can damage the screw and make disassembly difficult, especially for common circuit breakers in distribution boxes. 3) If bolts or nuts are difficult to remove, do not act rashly to prevent 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 '?' shape to increase contact area and prevent loosening. 7) When connecting wire joints or lugs, it is strictly prohibited to install non-copper or poorly conductive washers in between. 8) When connecting wire joints, the contact surface must be smooth and free of oxidation. When connecting lugs or copper bars, apply conductive paste to the cleaned contact surface before tightening. 9) When connecting temporary lines, single-strand flexible wires should be folded once at the end 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 '?' shape. 10) For motor wiring of 30KW and above, it is required that no poorly conductive washers, such as galvanized nuts, flat washers, or spring washers, be installed between the motor leads and the connecting cable wires. 11) When wrapping cables or other equipment requiring insulation protection with insulating tape, the insulation layer should be wrapped from one end to the other with a 1/2 overlap ratio, going back and forth at least once.

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