HONEYWELL TK-IOLI01模塊,TK-IOLI01中文PDF用戶手冊(cè)
擴(kuò)展端口引腳分配下表列出了在以下情況下需要的擴(kuò)展端口引腳分配：建筑遠(yuǎn)程電纜。電纜之間的所有連接都是點(diǎn)對(duì)點(diǎn)的，即針腳2一端連接到另一端的針腳2，針腳3連接到針腳3等。I/O擴(kuò)展總線終端當(dāng)兩個(gè)或多個(gè)基板在擴(kuò)展系統(tǒng)中連接在一起時(shí)，輸入/輸出擴(kuò)展總線必須正確端接。輸入/輸出總線必須在最后一個(gè)擴(kuò)展系統(tǒng)中的基板。每個(gè)信號(hào)對(duì)端接120歐姆，1/4瓦在適當(dāng)引腳之間接線的電阻器如下（另見上表）
HONEYWELL TK-IOLI01模塊：針腳16-17；24 - 25; 20 - 21; 12 - 13; 8 - 9; 2 - 3輸入/輸出總線終端可以通過以下方式之一完成：通過在最后一個(gè)端口上安裝目錄號(hào)為IC693ACC307的輸入/輸出總線終端插頭系統(tǒng)中的擴(kuò)展基板（本地?cái)U(kuò)展基板或遠(yuǎn)程基板）。終端插頭有一個(gè)物理安裝在連接器內(nèi)部的電阻器組。輸入/輸出總線終端插頭隨每個(gè)基板一起裝運(yùn)；只有最后一個(gè)基板在擴(kuò)展鏈中，可以安裝輸入/輸出總線終端插頭。未使用的輸入/輸出總線終端插頭可以丟棄或作為備件保存。如果擴(kuò)展系統(tǒng)只有一個(gè)擴(kuò)展基板，則輸入/輸出總線可以通過將50英尺（15米）輸入/輸出擴(kuò)展電纜作為最后一根電纜安裝而終止，目錄號(hào)IC693CBL302或IC693CBL314。這些電纜具有終端電阻器安裝在與擴(kuò)展基板連接器連接的一端。您還可以構(gòu)建一條自定義電纜，將終端電阻連接到適當(dāng)?shù)挠糜诎惭b在總線末端的銷。
Expansion Port Pin Assignments
The following table lists the expansion port pin assignments you will need when
building remote cables. All connections between cables are point-to point, that is, pin 2
of one end to pin 2 of the opposite end, pin 3 to pin 3, etc.I/O Expansion Bus Termination
When two or more baseplates are cabled together in an expansion system, the I/O
expansion bus must be properly terminated. The I/O bus must be terminated at the last
baseplate in an expansion system. Each signal pair is terminated with 120 ohm, 1/4 watt
resistors wired between the appropriate pins, as follows (see the above table, also):
pins 16 - 17; 24 - 25; 20 - 21; 12 - 13; 8 - 9; 2 - 3
The I/O bus termination can be done one of the following ways:
By installing an I/O Bus Terminator Plug, catalog number IC693ACC307, on the last
expansion baseplate (local expansion baseplate or remote baseplate) in the system.
The Terminator Plug has a resistor pack physically mounted inside of a connector.
The I/O Bus Terminator Plug is shipped with each baseplate; only the last baseplate
in the expansion chain can have the I/O Bus Terminator Plug installed. Unused I/O
Bus Terminator Plugs can be discarded or saved as spares.
If an expansion system has only one expansion baseplate, the I/O bus can be
terminated by installing as the last cable, the 50 foot (15 meter) I/O Expansion cable,
catalog number IC693CBL302 or IC693CBL314. These cables have the termination
resistors installed in the end that connects to the expansion baseplate connector.
You can also build a custom cable with termination resistors wired to the appropriate
pins for installation at the end of the bus.
