Omron EJ1 User Manual page 31

Internal Block Diagrams
HFU
Event input
Event input 1
circuit
Event input
Event input 2
circuit
Event input
Event input 3
circuit
Event input
Event input 4
circuit
EDU
10
Switch
Indicators
inputs
Waveform
shaping
circuit
Waveform
shaping
circuit
Waveform
shaping
Microcomputer
circuit
Waveform
shaping
circuit
SRAM
Port A commu-
Port B commu-
nications circuit nications circuit
Internal buses 1 to 3
24 VDC
TTL conversion circuit
Internal bus 1
Internal bus 2
24 VDC
EEPROM
Drive
circuit
Drive
circuit
Drive
circuit
Drive
circuit
Port C com-
RS-485/RS-232C
munications
communications
circuit
between devices
Port A connector
Port A communications
Port B communications
Drive Transistor
circuit outputs
Drive
Transistor
circuit
outputs
Input power supply
24 VDC
: Functional isolation
Section 1-3
Transistor
Auxiliary output 1
outputs
Transistor
Auxiliary output 2
outputs
Transistor
Auxiliary output 3
outputs
Transistor
Auxiliary output 4
outputs
Auxiliary output 1
Auxiliary output 2