Contec BX220 Series - Page 76

5. Each Component Function
BX-220 User’s manual
67
External I/O Circuit
4.7kΩ
1/4W
External power
(1
(12 - 24VDC)
Input
contacts
(PCOM)
(PI 0 - 2)
RAS Connector
PS2811-1
(IN）
1kΩ
(External circuit)
510Ω
Figure 5.6. Input circuit
(NCOM)
External power
(Max. 30VDC)
PS2811-1
1.3kΩ
2N3904
(External circuit)
Load
RAS Connector
(PO 0 - 2)
2.7kΩ
Figure 5.7. Output circuit