S7-200 interface module

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S7-200 interface modules are mainly digital I / O modules, analog I / O and communication modules. 

(A) digital I / O modules


Digital I / O module is designed to solve the native integrated digital input / output points can not be used to meet the needs of expansion modules. S7-200PLC currently provide a total of three categories, a total of nine kinds of digital I / O modules.
1. EM221 digital input expansion module
8DI, DC24V (DC)
 
2. EM222 digital output expansion module

8DO, DC24V (DC output)
8DO, Relay (DC24V / AC24 ~ 230V) (relay output)

3. EM223 digital mixing module
4DI (DC24V), 4DO (DC24V / 2A)
4DI (DC24V), 4DO (Relay 2A)
8DI (DC24V), 8DO (DC24V / 2A)
8DI (DC24V), 8DO (Relay 2A)
16DI (DC24V), 16DO (Relay 2A)
16DI (DC24V), 16DO (DC24V / 2A) 

(B) the analog I / O modules

Analog I / O modules provide analog input and analog output extensions. S7-200 analog expansion module has a greater adaptability, it can be directly connected to the sensor, and a great deal of flexibility and ease of installation.

1. EM231 analog input module
Range 4AI (voltage or current) of the input signal is set by SW1, SW2 and SW3.

2. EM232 analog output module
2AO (voltage or current)

3. EM235 Analog Mixed module
4AI (voltage or current), the range set by the SW1 ~ SW6
1AO (voltage or current)

(C) communication module

S7-200 series PLC in addition to the unit CPU226 incorporates two communication ports, other are in the internal integration of a communication port, communication port using the RS-485 bus.In addition, each PLC can also access the communication module in order to expand its number of interfaces and networking capabilities.

1. EM277 module
EM277 module is a PROFIBUS-DP slave module, which also supports MPI slave communication;

2. EM241: Modem (Modem) communication module

3. CP243-1: Industrial Ethernet communication module;

4. CP243-1 IT: Industrial Ethernet communication module, while providing Web / E-mail and other IT applications;

5. CP243-2: AS-Ⅰ master module can connect up to 62 AS-Ⅰ slave.
S7-200PLC configuration is made S7-200CPU these expansion module
 

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