PLCDuino

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STD PLCDuino

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Update time： 2021-01-05 12:45:51

Creation time： 2019-05-15 20:51:11

Description

This my first take on an Arduino Nano PLC(ish) device. It uses standard discrete components and thus is rather cheap to build. But discrete components do take up a bit more space. The inputs can accept up to 24v and are connected to the analoge pins, using optocouplers the inputs are electrically isolated from the Arduino. The outputs uses relays, the outputs from the relay uses an external source, that can be, with current relays, up to 250VAC or 30VDC. Outputs are grouped with 3,3,2 relays per group, 8 in total. This version only has 8 relays, and an extra port added (P9) this is specifically ment to be used with an ethernet adaptor (ENC28J60)

Design Drawing

schematic diagram

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PCB

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First layout
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	SRD-05VDC-SL-C	RELAY1,RELAY2,RELAY3,RELAY4,RELAY5,RELAY6,RELAY7,RELAY8	RELAY-SL-SRD	8
2	1N4007	D1,D2,D3,D4,D5,D6,D7,D8	DO-35	8
3	100	R1,R2,R3,R4,R5,R6,R7,R8	AXIAL-0.3	8
4	Terminal	P1,P2,P3	WJ2EDGV-5.08-4P	3
5	LED-5MM	LED2,LED3,LED4,LED5,LED6,LED7,LED8,LED9	LED-5MM/2.54	8
6	270	R14,R16,R17,R18,R19,R20,R21,R22,R13	AXIAL-0.3	9
7	BC547	Q1,Q2,Q3,Q4,Q5,Q6,Q7,Q8	TO-92V	8
8	10K	R15	AXIAL-0.3	1
9	ARDUINO_NANO	U1	ARDUINO_NANO	1
10	Terminal	P7,P8	WJ2EDGVC-5.08-9P	2
11	PowerJack	J1	POWER_JACK_SLOT!	1
12	L7805ABV	U2	TO-220(TO-220-3)	1
13	PC817	U3,U4,U5,U6,U7,U8,U9,U10	DIP-4	8
14	Terminal	P9	HDR-IDC-2.54-2X3P	1
15	2k7	R27,R29,R31,R33,R35,R37,R39,R41	AXIAL-0.3	8
16	10k	R28,R30,R32,R34,R36,R38,R40,R42	AXIAL-0.3	8
17	47u	C3,C4	CAP-D5.0XF2.0	2
18	Terminal	P6,P5	WJ2EDGVC-5.08-2P	2
19	LED-3MM	LED1	LED-3MM/2.54	1
20	100n	C1,C2	RAD-0.1	2