4 layers100 × 77 mm
4 layers100 × 77 mm
XT V1
Synthron/SynPLC1STM32-based PLC system
- Size
- 100 × 77 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 92
- Nets
- 98
- Pads
- 306
- Tracks, vias
- 451, 125
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 4 Jul 2021
- Updated
- 2 Jun 2026
Overview
XT V1 is an open-source printed circuit board by Synthron, from the Synthron/SynPLC repository on GitHub. It is a 4-layer board of 100 × 77 mm with 92 parts on 98 nets, routed with 451 tracks and 125 vias.
It is built around the MAX485ED, SN65HVD232D and MOC3043M, with the TLP291-4, BC846 and TBL009-500-02GY-2GY among its other parts. Its parts include 37 resistors, 18 capacitors, 10 ICs, 10 transistors and 10 connectors. It belongs with the STM32 boards of this library.
Main components
7
MAX485ED
SOP-8-40℃~+85℃ 1 1 1mA 32 4.75V~5.25V 5Mbps Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTCRS-485 / RS-422 ICs
SN65HVD232D
SOIC-8-40℃~+85℃ 17mA 1Mbps 3.3V CAN Transceiver SOIC-8 CAN Transceivers ROHSTexas InstrumentsCAN Transceivers
MOC3043M
DIP-6-55℃~+110℃ 1 1.5V 1000V/us 100mA 330mW 400V 5kV 6 60mA TRIAC Yes DIP-6 Triac, SCR Output Optoisolators ROHSAOTETriac, SCR Output Optoisolators
TLP291-4
SOIC16Quad Channel Optocoupler, Phototransistor OutputToshibaUncategorised
BC846
SOT-23-65℃~+150℃ 1 NPN 100mA 110 15nA 250mW 400mV 65V 6V 770MHz NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)TBL009-500-02GY-2GY
插件,P=5mm1 10A 2 2P 300V 5mm Gray Through Hole Plugin,P=5mm Spring Clamp System Terminal Block ROHSCUISpring Clamp System Terminal Block
SM4007
MELFMELF Diodes - General Purpose ROHSYONGYUTAIDiodes - General Purpose
README
README.mdSynPLC
Open Source modular PLC with Microcontrollers
WORK IN PROGRESS
To-Dos
Repo
- Rewrite documentation in english
- add reviewed PCBs
- fill out tech specs of modules once programmed
- Cleanup Repo
- better folder structure
- delete obsolete files
Hardware
- Order new PCBs with STM32s
- Assemble new PCBs
- Test new hardware
- DO
- DI
- AO
- AI
- XT
- New Modules
- CPU V2
- Layout
- Review
- Ordered
- Relais Module
- PWM Module
- CPU V2
Software
- Write Software for new PCBs
- CPU
- DO
- DI
- AO
- AI
- XT
- Porting of SR485 protocol to new hardware
- Make it use Interrupts
- Make it more efficient (processing)
- implement failsafes when no answer
- Define and program CAN protocol
- Write generalized Code for CPU
-
define structured Text(postponed) -
import structured text and parse into running code(postponed)
Possible Fixes
-
MAX485 with 5V supply voltage on all IO modules ?- changed to 3V3 on the CPU
- DIs and DO (alt. switches) re-soldering (dead channels)
- better connector for CPU
- parametrize RS485 lib a bit more (tbd)
issues
- weird additional bytes sent by slave after ACK and CS???
- resolved
Parts
92| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R3, R4, R7, R8, R9, R10, R11, R12, R13, R14, R15, R17, R18, R23, R24 |
| 10 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C4, C6, C7, C8, C9, C10, C11, C12, C14 |
| 6 | BC846 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q7 |
| 4 | 10n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C15, C16, C17, C18 |
| 4 | 330 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R25, R30, R31, R32 |
| 4 | 360 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R21, R26, R27, R28 |
| 4 | 68 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R29, R35, R36, R37 |
| 4 | BT136-500 | Package_TO_SOT_THT:TO-220-3_Vertical | Q6, Q8, Q9, Q10 |
| 4 | MOC3043M | Package_DIP:DIP-6_W8.89mm_SMDSocket_LongPads | U5, U7, U9, U10 |
| 4 | TBL009-500-02GY-2GY | KiCAD_personal:TBL00950002GY2GY | J7, J8, J9, J10 |
| 4 | max 360 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16, R19, R20, R22 |
| 2 | 1µ | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C13 |
| 2 | 20p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3 |
| 2 | 56k | Resistor_SMD:R_MELF_MMB-0207 | R33, R34 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2, J3 |
| 2 | Conn_02x05_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Horizontal | J5, J6 |
| 2 | SM4007 | Diode_SMD:D_MELF | D1, D2 |
| 2 | TLP291 | Package_SO:SOIC-4_4.55x2.6mm_P1.27mm | U6, U8 |
| 1 | 120 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 150 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 1M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 8MHz | Crystal:Crystal_SMD_HC49-SD | Y1 |
| 1 | AP1117-33 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U4 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal | J1 |
| 1 | Conn_02x03_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J4 |
| 1 | LOGO | KiCAD_personal:logo_new | G*** |
| 1 | MAX485E | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | SN65HVD232 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U3 |
| 1 | SW_DIP_x05 | Button_Switch_THT:SW_DIP_SPSTx05_Slide_6.7x14.26mm_W7.62mm_P2.54mm_LowProfile | SW1 |
The 90 most common of 92 parts.
Questions
How big is the XT V1 PCB?
It measures 100 × 77 mm and has 4 copper layers, 1.6 mm thick.
What parts does the XT V1 use?
92 parts, built around the MAX485ED, SN65HVD232D, MOC3043M and TLP291-4. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the XT V1 KiCad files?
From the Synthron/SynPLC repository on GitHub, at the commit this page was made from: the board is hardware/pcbs/XT_V1/XT_V1.kicad_pcb and its schematic hardware/pcbs/CPU_V2/CPU_PiggyBack/CPU_PiggyBack.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the XT V1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Synthron before reusing the design.
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