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Replacement PCB For OP-320A HMI which gives partial Arduino compatability

4 years ago 5551
  • Description
  • Documents
  • BOM
  • Attachments
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Description

The PCB attaches to the back of the OP-320A unit, which is a cheap operator console panel you can get off aliexpress or ebay for about $50, you remove the PCB with the unit and attach this as a replacement to give arduino compatibility.

Wiring mostly copied from teensy++ and uno so something of a mix here, Uses a standard Arduino shield header but you will definitely need to adjust your sketches as some pins will be dedicated to the LCD and keypad. Also added two headers for the 4-pin relay boards and RS-232 boards that cost a dollar or two off ebay. All pins labelled for ease of use.

Note in my system I did not use the back plastic cover as it was going into another panel and the original back cover wont we deep enough to accommodate the unit so you will have to make a back housing and it will be deeper than the original OP-320A.

Second PCB seems to work OK with the bootloader supplied on the chip, the third version (here) has minor layout changes and should be 100% good.

Have Fun

Documents

Weighbridge HMI PLC

Weighbridge HMI PCB

BOM

ID Value Qty. Package Components
1 220 1 0805 R5
2 SIP9 1 HDR1X9 KBD
3 100n 4 0805 C24,C25,C4,C5
4 LCM19264B 1 SINGLEROWHEADER1X20 P
5 1N4001 1 SOD123 D2
6 BUZZER 1 BUZZER-12MM-NS-KIT SG2
7 2N7002 1 WSOT-23 Q2
8 100 1 0805 R1
9 AT90USB646-AU 1 TQFP64-0.8-14X14MM U1
10 ICSP 1 HDR2X3 U2
11 test 1 HDR1X6 U3
12 test 2 HDR1X8 U4,U6
13 test 1 HDR1X10 U5
14 XTALfast 1 CRYSTAL_HC-49U Q1
15 10p 2 0805 C1,C2
16 USB-MINIB 1 USB-MINI-B-SMD1 U7
17 22 2 0805 R2,R3
18 10K 2 0805 R4,R8
19 1u 1 C1210 C3
20 PWR 1 LED3MM D1
21 1K 2 0805 R6,R7
22 PGM 1 LED3MM D4
23 SPST_OFF 2 TACTILE-SWITCH-BOZ RST,HWF/ALE
24 V_REG_LM1117 1 SOT223 U9
25 LM2576HVS-5.0NOPB 1 TS5B U10
26 150u 1 CD127 12*12MM BOZ L1
27 ss34 1 SMA-DIODE D5
28 220uF 1 ELECTRO-SMD-C-6MM CT1
29 100u 1 PANASONIC_SKV_CAP C6
30 M03-SCREW-5MM 1 SCREWTERMINAL-5MM-3 JP1
31 3266P-1-502 1 P250SQ R9
32 Relay 1 HDR1X6 U8
33 RS232-TTL 1 HDR1X4 U11
34 24V 1 LED3MM D3
35 1.5A 24V PTC 1 PTC1812L F1

Attachments

Filename Download
HMI.jpg

Members

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