OVERVIEW

Basic Details: LYA010A Input/Output Module HITACHI

1 PLC Input/Output Modules

Introduction 1.1 Digital and Analogue Signals

Digital input/output signals are switching signals, a 1 or a 0.

Analogue signals, there are two kinds of voltage signals or current signals, generally signals transmitted by the transmitter, such as pressure transmitter to detect the pressure of the water pipe, will output a 4-20ma or 0-10V analogue signal to the PLC, the PLC for data processing.

Switching input point (DI), processing switching input signal.

Analogue input point (AI), processing analogue input signals (0-20 MADc, 0-5VDC).

Resistance signal (including RTD) input point, processing RTD or general resistance signal.

High-speed pulse input point, processing high-speed pulse signals.

Voltage (including thermocouple) input point, processing voltage input or thermocouple signals.

utput module

The function of PLC output module is to amplify the power of the output signal.PLC signals are expressed in terms of level, in order to make them not distorted during being read, it needs to have a certain amount of reserve energy or a certain amount of signal power. The output module functions effectively as a power amplifier. The output module is the module that drives the external load.

Common PLC output devices, transistors, thyristors, relays.

PLC input modules are used to receive various parameters of the production process. (Start Stop)

PLC output module is used to send out the information obtained after the operation of the programmable controller and to complete the control of various industrial sites by realising the machine. (Execution results and output) 1. has good anti-interference ability.

2、It can meet the matching requirements of various signals in industrial site.