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xO08R2 1SBP260109R1001 ABB 繼電器輸出擴展模塊

1PLC類型

其中MR為繼電器類型，MT為晶體管類型，它們的區(qū)別是:

1.繼電器接的外部電源可以是直流也可以使交流，可直接驅(qū)動22v直流負載，晶體管的外部電源只能接直流的，不能直接驅(qū)動開關(guān)，需要接中繼來間接驅(qū)動

⒉.繼電器類型的開關(guān)頻率低，而晶體管可以輸出高頻信號如伺服系統(tǒng)的脈沖輸出就使用晶體管類型的PLC。在實際運用中根據(jù)需要來選擇相應的PLC規(guī)格。

2PLC輸出端子輸出端子介紹

以40端子來說明，輸入3組+輸出2組=5*40揣子，其中輸入端子只有一個公共端S/S，而輸出有5個公共端。YO和V1各單獨使用com端，V2和Y3共用con2，V4、5、6、7共用com3，v10、11.12、13共用com4，Y14、15、16、17共用com5。

3繼電器接線

繼電器類型的PLC輸出回路如下圖，可以使用直流電源和交流電源來驅(qū)動負載，不分漏源型輸出。繼電器型PLC輸出回路

工控中常見的輸出控制有電機、指示燈、報警器、電磁閥門等，有個能直接與PLC輸出端子Y連接，有的則需要中間繼電器或者接觸器來連接。

這些閥門的輸出線為兩線制，一根接火線、另一根零線，可直接通過PLC輸出端子與電源相接來控制，一般為了保護PLC需添加中繼進行連接，通過中繼的觸點與電磁閥相連。

輸出與中繼連接

輸出與接觸器連接4晶體管

晶體管類型的PLC的外部電源必須是直流的，有漏型接法．源型接法與輸入的說法剛好相反;晶體管plc輸出

除了外部電源與負載電源一致以外的，其他輸出不能直接與負載相連接，它的輸出端與com斌在沒有輸出的情況下是半導通狀態(tài)，接交流負載常導通，這個新手一定注意。它一般通過中繼與負載連接，此時的中繼為直流類型的的，線圈一定主要正負極。

例如MT類型的PLC控制電機，通過24v直流中繼的間接控制接觸器。

總體來說，PLC輸出信號的接法簡單，可以理解PLC的輸出就是線圈的兩個觸點Y和com端，這兩個觸點接負載的兩端即可，我們只要了解PLC的輸出類型與負載類型看是否需要通過中繼來驅(qū)動。

1PLC type

Where MR Is the relay type, MT is the transistor type, their difference is:

1. The external power supply connected to the relay can be DC or AC, which can directly drive 22v DC load. The external power supply of the transistor can only be connected to DC, and can not directly drive the switch

The switching frequency of the relay type is low, and the transistor can output high frequency signals such as the pulse output of the servo system using a transistor type PLC. In the actual application according to the need to choose the corresponding PLC specifications.

2PLC Output terminal This section describes the output terminal

To illustrate with 40 terminals, 3 groups of input + 2 groups of output =5*40 rods, in which the input terminal has only one common terminal S/S, and the output has 5 common terminals. YO and V1 use com terminals separately, V2 and Y3 share con2, V4, 5, 6, and 7 share com3, v10, 11.12, and 13 share com4, and Y14, 15, 16, and 17 share com5.

3 Relay Wiring

The PLC output circuit of the relay type is shown below. Dc power supply and AC power supply can be used to drive the load, regardless of drain-source output. Relay type PLC output loop

Common output controls in industrial control include motor, indicator light, alarm, electromagnetic valve, etc., one can be directly connected with PLC output terminal Y, and some need intermediate relays or contactors to connect.

The output line of these valves is two-wire system, one is connected to the live line and the other is neutral line, which can be controlled directly through the PLC output terminal and the power supply. In general, in order to protect the PLC, a trunk needs to be added for connection, and the solenoid valve is connected through the contact of the trunk.

The output connects to the trunk

The output is connected to the contactor with 4 transistors

The external power supply of a transistor type PLC must be DC and have a drain connection. The source type connection is the opposite of the input; Transistor plc output

In addition to the external power supply is consistent with the load power supply, other output can not be directly connected with the load, its output and com bin in the absence of output is semi-conductive state, connected to the AC load normal conduction, this novice must pay attention to. It is generally connected with the load through a trunk, at this time the trunk is DC type, and the coil must be mainly positive and negative.

For example, a PLC of the MT type controls the motor and indirectly controls the contactor through a 24v DC relay.

In general, the PLC output signal connection is simple, it can be understood that the PLC output is the two contacts Y and com end of the coil, the two contacts can be connected to both ends of the load, we only need to understand the PLC output type and load type to see whether it needs to be driven by relay.

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