信號流從傳感器連接到I/O模塊上的接線板開始。這個

接線板安裝在機(jī)柜上，有兩種基本類型：T型和

S型模塊。

T型模塊通常將輸入扇風(fēng)至三個獨(dú)立的I/O包。它們包含兩個

可拆卸的24點(diǎn)屏障式接線板。每個點(diǎn)可以接受兩個3.0 mm2

（#12，AWG）電線，每點(diǎn)300 V絕緣，扁平或環(huán)形接線片。俘虜

還提供了用于端接裸電線的夾具。螺釘間距為9.53毫米（0.375英寸）

最小，中心到中心。T型模塊通常是表面安裝的，但也可能

采用DIN導(dǎo)軌安裝。

每個塊旁邊都有一個屏蔽帶，實(shí)際上是

安裝模塊的金屬底座。寬模塊和窄模塊排列在

可以從頂部和/或

底部電纜入口。寬模塊的一個例子是包含磁性的模塊

螺線管驅(qū)動器用帶保險絲電路的繼電器。

Signal flow begins with a sensor connected to a terminal block on an I/O module. The terminal board mounts to the cabinet and is available in two basic types: T-type and S-type modules. T-type modules typically fan the inputs to three separate I/O packs. They contain two removable 24-point, barrier-type terminal blocks. Each point can accept two 3.0 mm2 (#12,AWG) wires with 300 V insulation per point and spade or ring-type lugs. Captive clamps are also provided for terminating bare wires. Screw spacing is 9.53 mm (0.375 in) minimum, center-to-center. T-type modules are normally surface mounted, but may also be DIN-rail mounted. A shield strip is provided next to each block, which is actually the left-hand side of the metal base where the module is mounted. Wide and narrow modules are arranged in vertical columns of high and low-level wiring that can be accessed from top and/or bottom cable entrances. An example of a wide module is a module containing magnetic relays with fused circuits for solenoid drivers.