CN201174156Y

CN201174156Y - Annular loop wiring construction

Info

Publication number: CN201174156Y
Application number: CNU2008200282262U
Authority: CN
Inventors: 焦利安; 万亮
Original assignee: XI`AN TAMEFIRE CO Ltd
Current assignee: XI`AN TAMEFIRE CO Ltd
Priority date: 2008-01-29
Filing date: 2008-01-29
Publication date: 2008-12-31
Anticipated expiration: 2018-01-29

Abstract

The utility model provides a ring circuit wiring structure. A circuit bus consists of a wire L+ and a wire L-, and a device on the bus is connected with a port A and a port B through the wires of L+ and L- to form a circuit. The wiring structure is safe and reliable, minimizes the loss of an owner, and is an efficient and safe two-wire system circuit wiring structure. In the ring circuit wiring structure, when any point on the circuit has the failure of short circuit, only the local device on the circuit can not work without causing the paralysis state of the whole circuit. Therefore, when any point on the circuit has the failure of open circuit, the whole circuit can work normally and is not affected.

Description

The loop checking installation wire structures

Technical field

The utility model relates to the network layout structure in the fire alarm system.

Background technology

The traditional wired mode is the two-wire system open loop mode of connection, as shown in Figure 1, wherein the loop bus is made up of two line L+ and L-, the equipment that detector and module, buses isolator (hereinafter to be referred as isolator) etc. are connected on the bus detects on mouthful B mouth (hereinafter referred to as loop B mouth) by the loop that L+, L-are connected controller, and opening circuit on the B mouth of loop all will have a strong impact on the working condition in loop with short-circuit conditions.

Summary of the invention

The purpose of this utility model provides a kind of loop checking installation wire structures, and this wire structures safety and reliability can drop to minimum with loss, is a kind of efficient, safe two-wire system loop wire structures.

The technical solution of the utility model is a kind of loop checking installation wire structures, it is characterized in that the loop bus is made up of two line L+ and L-, and the equipment on the bus is connected by L+, L-on the A mouth and B mouth of controller, forms loop checking installation.

Adopt loop checking installation wire structures of the present utility model, break down more arbitrarily on the loop, operate as normal can be continued in whole loop, and unaffected or local being affected is unlikely to make whole loop in paralyzed state.

Description of drawings

Fig. 1 is traditional two-wire system open loop wire structures synoptic diagram.

Fig. 2 is an annular wire structures synoptic diagram of the present utility model.

Embodiment

When adopting loop circuit connection mode, wiring as shown in Figure 2: wherein the loop bus is made up of two line L+ and L-, and the equipment that detector and module, isolator etc. are connected on the bus is connected on the A mouth and B mouth of controller by L+, L-.

Below respectively the loop checking installation mode of connection is elaborated by contrast with traditional corresponding various situations of the two-wire system open loop mode of connection course of work.

1, just often, loop B confession electricity, loop operate as normal.

If 2 C point short circuit, traditional two-wire system open loop mode of connection will cause whole loop to work, and when adopting the loop checking installation wiring, when the loop detects loop bus C point short circuit, the action of 1# isolator disconnects the loop bus 1#, 2# equipment failure from the 1# isolator, the loop is from the power supply of A end, and 3#-8# equipment continues operate as normal.

If when the short circuit of 3 D point, the traditional two-wire system open loop mode of connection, when the loop detected loop bus D point short circuit, the action of 1# isolator disconnected the loop bus from the 1# isolator, have only 1# and 2# equipment to work, miscellaneous equipment all can't be worked.And when adopting the loop checking installation wiring, when the loop detects loop bus D point short circuit, 1# isolator, the action of 2# isolator, the loop bus is disconnected from 1# and 2# isolator, the loop is from A, the power supply of B two ends, 1#-2#, 5#-8# equipment still can continue operate as normal, have only 3#, 4# equipment failure on the loop.

If when the short circuit of 4 E point, the traditional two-wire system open loop mode of connection, when the loop detected loop bus E point short circuit, the action of 2# isolator disconnected the loop bus from the 2# isolator, have only 1#-4# equipment to work, miscellaneous equipment all can't be worked.And when adopting the loop checking installation wiring, when the loop detects loop bus E point short circuit, 2# isolator, the action of 3# isolator, the loop bus is disconnected from 2# isolator and 3# isolator, the loop is from A, the power supply of B two ends, 1#-4#, 7#-8# equipment still can continue operate as normal, have only 5#, 6# equipment failure on the loop.

If 5 loops point opens circuit, during the traditional two-wire system open loop mode of connection, all devices after sentence from opening circuit in the loop all can't be worked, and when adopting the loop checking installation wiring, after certain point opened circuit, the loop was from A, the power supply of B two ends, and all devices continues operate as normal.

From above working condition contrast as can be seen; adopt the loop checking installation mode of connection more much higher than the system reliability that adopts traditional open loop mode of connection; it drops to the possibility that buildings loses protection minimum; make owner's property and life obtain reliable protection, make owner's loss drop to minimum.

Claims

1, a kind of loop checking installation wire structures is characterized in that the loop bus is made up of two line L+ and L-, and the equipment on the bus is connected by L+, L-on the A mouth and B mouth of controller, forms loop checking installation.