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2
Chapter 2 Product Introduction
2.1 Outline
The outline of EC20 main module is shown in Figure 2-1.
The name and function of the components in the figure are as follows:
1. The installation position of a button cell battery (CR2032 lithium battery) for data backup.
2. Power supply input ports
3. Signal input ports
4. Input signal status LEDs
5. 26pin busbar socket, used for connecting the expansion module
6. Output signal status LEDs
7. Fix screws, used for tightening the top/bottom cover of the PLC
8. Mounting holes, used for installing screws
9. Locking device of 35mm DIN, used for DIN rail installation mode.
10. Signal output ports
11. System operation status LEDs
12. Communication port COM1, providing RS485 and RS232 at the same time
13. Communication port COM0, RS232, Mini DIN8 socket
14. System operation control switch, with three positions: ON, TM and OFF.
15. Analog potentiometers (two)
2.2 Maximum Configuration
The main module and the I/O expansion modules can achieve the most 512 logic points (256 in/256 out maximum).
And eight special function modules can be expanded at most.
2.3 Internal Memory Capacity Of User Program
The user program is 8K words (16K byte) at most and supports 8,000 data blocks of D register.
2.4 Resource Configuration Of System Soft-device
Component
X
Input relay
Y
Output relay
M
Auxiliary relay
LM
Local relay
Chapter 2 Product Introduction
1
15
14
13
12
11
Figure 2-1 Outline of EC20 main module
Name
Quantity
256
256
2000
64
EC20 Series PLC User Manual
2
3
10
Serial No.
X000~X377
The soft-device numbering is octal code
Y000~Y377
The soft-device numbering is octal code
M0~M1999
LM0~LM63
4
5
6
7
8
9
Note
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