IC3645LXCD1TT GE 扩展单元数字输入/输出模块

项目编号:IC3645LXCD1TT GE

产地:美国

保修:—年

IC3645LXCD1TT是美国通用电气公司生产的一种扩展单元数字输入/输出模块。

IC3645LXCD1TT扩展单元数字输入/输出模块是一种工业自动化设备，它可以扩展PLC（可编程逻辑控制器）的功能，实现数字信号的输入和输出。这种模块通常采用模块化设计，可以方便地与PLC进行组合和扩展，适用于各种工业自动化控制场合。扩展单元数字输入/输出模块具有高可靠性、高抗干扰性、高精度等特点，能够满足各种工业环境的需求。在工业自动化领域，IC3645LXCD1TT扩展单元数字输入/输出模块的应用非常广泛，如生产线自动化、过程控制、运动控制、楼宇自动化等。

IC3645LXCD1TT输出模块的作用是将中央处理器处理过的数字信号，转换成现场执行部件能接收的信号，用来控制接触器、电磁阀、调节阀、调速装置等，控制的另一类负载是指示灯、数字显示器和报警装置等。

IC3645LXCD1TT为提高抗干扰能力，一般的输入/输出单元都有光电隔离装置。在数字量IO模块中广泛采用由发光二极管和光电三极管组成的光电耦合器，在模拟量IO模块中通常采用隔离放大器。

要先弄清除控制系统的IO点数，再按实际需点数的15~20%留出备用量(为系统的改造等留有余地〉后确定需FLC的点数。PLC的输出点可分为共点式、分组式和隔离式几种接法。隔离式的各组输出点之间可以采用不同的电压种类和电压等级，但这种PLC平均每点的价格较高。如果输出信号之间不需要隔离，则应选择前两种输出方式的PLC.

(3)对I/O响应时间的选择

PLC的IO响应时间包括输入电路延迟、输出电路延迟和扫描工作方式引起的时间延迟（一般在2~3个扫描周期)等。对开关星控制的系统，PLC和V/O响应时间一般都能满足实际工程的要求，可不必考虑IO响应问题。但对模拟量控制的系统、特别是闭环系统就要考虑这个问题。

(4）根据输出负载的特点选型

不同的负载对PLC的输出方式有相应的要求。例如，频繁通断的感性负载，应选择晶体管或晶闸管输出型的，而不应选用继电器输出型的。但继电器输出型的PLC有许多优点，如导通压降小，有隔离作用，价格相对较便宜，承受瞬时过电压和过电流的能力较强，其负载电压灵活(可交流、可直流)且电压等级范围大等。以动作不频繁的交、直流负载可以选择继电器输出型的PLC。

IC3645LXCD1TT GE 扩展单元数字输入/输出模块

Project number :IC3645LXCD1TT GE

Origin: USA

Warranty: - year

The IC3645LXCD1TT is an expansion unit digital input/output module produced by General Electric.

IC3645LXCD1TT expansion unit Digital input/output module is an industrial automation equipment, it can expand the function of PLC (programmable logic controller), to achieve the input and output of digital signals. This module is usually modular design, can be easily combined and extended with PLC, suitable for a variety of industrial automation control occasions. The expansion unit digital input/output module has the characteristics of high reliability, high anti-interference, high precision and so on, which can meet the needs of various industrial environments. In the field of industrial automation, the IC3645LXCD1TT expansion unit digital input/output module is widely used, such as production line automation, process control, motion control, building automation and so on.

The function of the IC3645LXCD1TT output module is to convert the digital signal processed by the central processor into a signal that can be received by the field executive parts, which is used to control the contactor, solenoid valve, regulating valve, speed regulating device, etc. Another type of load control is the indicator light, digital display and alarm device.

IC3645LXCD1TT In order to improve anti-interference ability, the general input/output unit has an photoelectric isolation device. Photoelectric couplers composed of light-emitting diodes and phototriodes are widely used in digital IO modules, and isolation amplifiers are usually used in analog IO modules.

In addition to the IO points of the control system, we must first find out the spare amount of 15 to 20% of the actual number of points needed (leaving room for the transformation of the system, etc.) and then determine the number of points that need FLC. The output points of PLC can be divided into common point, group and isolated connections. Different voltage types and voltage levels can be used between isolated groups of output points, but the average price per point of this PLC is higher. If there is no need for isolation between the output signals, the PLC of the first two output modes should be selected.

(3) The choice of I/O response time

The IO response time of PLC includes the input circuit delay, the output circuit delay and the time delay caused by the scanning mode (generally in 2 to 3 scanning cycles). For the switching star control system, PLC and V/O response time can generally meet the requirements of practical engineering, but do not have to consider the IO response problem. However, this problem should be considered for analog control systems, especially closed-loop systems.

(4) Selection according to the characteristics of the output load

Different loads have corresponding requirements for the output mode of PLC. For example, the inductive load with frequent on-off should be selected as a transistor or thyristor output type rather than a relay output type. However, the relay output PLC has many advantages, such as small on-voltage drop, isolation effect, relatively cheap price, strong ability to withstand instantaneous overvoltage and overcurrent, flexible load voltage (can be AC, DC) and a large range of voltage levels. A relay output PLC can be selected for AC and DC loads with infrequent action.