Ethernet Modbus Gateway

3 years ago

Open source license: Public Domain

  • 3.2k
  • 0
  • 5

Description

Second iteration. First version worked fine but decided I needed a factory reset switch and LED's moving to end of PCB.

Designed to fit exactly in "VG-AL53" aluminium enclosure (google it) these are about $7 on aliexpress.

Works with Microchip TCP Lite stack. Firmware is very close but not yet complete.

I have attached the MPLABX XC8 project in a semi-working state below. Basically it is forwarding everything from ethernet to serial but I cannot test the other way until I get my MODBUS slave device setup. I will update this when status goes to finished.

Note the chip works well but is only really suitable for baud rates up to 9600 which is what I am testing it at and what it will be used at. Stack is also only half-duplex, again this is fine due to the 2-wire RS485 which can only transmit or receive but not both.

There are multiple compiler warnings for the Microchip TCPIP Lite stack when this compiles with XC8 but I have left it on test for several hours transferring at full speed and pinging at the same time and it was fine.

Documents

BOM

ID Name Designator Footprint Quantity Mounted
1 HR911105A RJ45 RJ45-LIGHT 1 Yes
2 PIC18F67J60-I/PT U1 TQFP-64_10X10X05P 1 Yes
3 MB2S D1 BRIDGE-MBS 1 Yes
4 100 C1,C6,C7,C8,C9,C10,C11,C15,C16,C20,C25,C26 0805 12 Yes
5 1uf C3 C1210 1 Yes
6 ss34 D2 SMA-DIODE 1 Yes
7 25MHZ X1 OSC-49OSC-YSX-1 1 Yes
8 27 C12,C13 0805 2 Yes
9 390Ω R1,R2 0805 2 Yes
10 10uF 6.3V C14 0805 1 Yes
11 10K R9,R12 0805 2 Yes
12 ICSP J1 1X05_LOCK 1 Yes
13 1K R10,R4,R6 0805 3 Yes
14 390 R11 0805 1 Yes
15 PWR5V LED1,LED2,LED3 1206 3 Yes
16 49.9R 1% R13,R14,R15,R16 R0603 4 Yes
17 120Ω L1 1206 1 Yes
18 2.26K 1% R17 0805 1 Yes
19 24V JP1 WJ2EDGRC-5.08-2P 1 Yes
20 SWITCH-3x6x2.5_SMD FACTORY-RST SWITCH-3X6X2.5_SMD 1 Yes
21 d3dac2d9512a463eac42efbd177de188 U5 SOT-23-6 1 Yes
22 10u C5,C17 C1210 2 Yes
23 4.7uH H1 TDK CLF6045NI-D 1 Yes
24 3c783d10c8744577bacae1f841989c5d C18 1210 1 Yes
25 33 C21 0805 1 Yes
26 8b13548c86d341de9fe3c85cc546e90d U4 SOT-23-5 1 Yes
27 175838e3dcb241e4b22093d071a294e5 U7 WURTH 760390014 1 Yes
28 3c6d496bc78b4fff998c01a11a687560 D3,D4 SOD-123FL 2 Yes
29 1u C19,C22,C2 C1210 3 Yes
30 100nF C23,C4 C0805 2 Yes
31 5e4e17a105444ba86baec0419018727d C24 1206 1 Yes
32 72c01ea8083a4cc2a43052fc89d8e24e U3 SOT-23-5 1 Yes
33 bbdc08ae742d480ca010f2b005a70367 U6 SOIC-16W 1 Yes
34 120 RTERM R0805 1 No
35 c4157e6c09187ae05dc3aa858aec20cb D5 SOT-23(SOT-23-3) 1 Yes
36 b9027764c0dee89330e80ccac0deb914 R21,R22 0805 2 Yes
37 RS485 JP2 WJ2EDGRC-5.08-2P 1 Yes

Unfold

Project Members

Login or Register to comment
Comments have been closed by project owner
Comments have been closed by mission publisher
All comments 0

服务时间

周一至周五 9:00~18:00
  • 0755 - 2382 4495
  • 153 6159 2675

服务时间

周一至周五 9:00~18:00
  • 立创EDA微信号

    easyeda

  • QQ交流群

    664186054

  • 立创EDA公众号

    lceda-cn