model
Technical Parameters
CPU ST20
order number
UN 288-1ST20-0AA0
Dimensions W x H x D (mm)
90 x 100 x 81
Current supply (24 V DC)
300 mA max
Digital input current consumption (24 V DC)
4 mA per input used
CPU characteristics
user memory
24KB program memory/8KB data memory/10KB retentive memory
Onboard digital I/O
12 points input/8 points output
module extension
Up to 6 expansion modules
Signal Board Expansion
Up to 1 signal board
high-speed counter
6 total
Single phase: 6 channels 200 KHz
AB phase: 4 channels 100 KHz
communication
number of ports
Ethernet: 1
Serial Port: 1 (RS485)
Expansion port: optional 485 BD board
programmingSerial port: 1 connection, Ethernet port: 1
Serial port: 1 connection, Ethernet port: 1
equipment
connection
CPU（PUT/GET）
Ethernet: Total number of client, server connections 6
power input
voltage range
20.4 ~ 28.8 V DC
Power Output
voltage range
20.4 ~ 28.8 V DC
Rated output current (max)
300 mA
digital input
Enter the number of points
12
type
sink/source
Rated voltage
Normal DI point: 24 V DC at 4 mA, rated High-speed DI point: 24 V DC at 6.5 mA, rated
allowable continuous voltage
30 V DC max
Logic 1 signal (minimum)
I0.0 - I0.3: 4 VDC at 12.75 mA I0.6
- I1.1: 15 VDC at 3.7 mA
Other: 15 VDC at 2.5 mA
Logic 0 signal (maximum)
I0.0-I0.3: 1VDC at 1mA
Other inputs: 5VDC at 1mA
filter time
Individually selectable for each channel (points I0.0 to I1.3): 0.2, 0.4, 0.8, 1.6, 3.2,
6.4 and 12.8µs 0.2, 0.4, 0.8, 1.6, 3.2,
6.4 and 12.8ms
digital output
output points
8
type
Solid State - MOSFET (Source)
voltage range
20.4 ~ 28.8 V DC
Text
0.5 A
Side View
Dimensions (mm)
Wiring Diagram
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