# DMX Relay ## Description Universal 100–240 VAC 15 A DMX/RDM Relay with Isolated RS‑485, Modular IEC60320/XLR3 I/O, Inrush/Surge Protection, and RDM-Configurable Addressing ## Project Details - **Owner:** ganiered - **Created:** 4/21/2025 - **Last Updated:** 12/29/2025 - **Visibility:** Public - **OffDelay:** 200ms - **Board Size:** 90.0 mm x 60.0 mm - **OnDelay:** 100ms - **System Architecture:** ```mermaid flowchart TD MainsIn["AC Mains Input\n100-240 VAC"] --> Protection[Fuse + MOV + NTC] Protection --> ACDC["Isolated AC-DC Supply"] ACDC --> MCU["MCU\nDMX/RDM Control"] ACDC --> RS485["Isolated RS-485\nDMX Interface"] MCU --> Display["4-digit 7-Segment Display"] MCU --> Encoder["Rotary Encoder"] MCU --> RelayDriver["Relay Driver\nFlyback Diode"] RelayDriver --> Relay["15 A Mechanical Relay"] Relay --> RCsnubber["RC Snubber"] RS485 --> XLR3["XLR3 DMX I/O\nSwitchable 120ohm"] MainsIn --> IECIn["IEC60320 Inlet"] Relay --> IECOut["IEC60320 Outlet"] subgraph Indicators DMXLED["DMX Present LED"] RelayLED["Relay ON LED"] end RS485 --> DMXLED Relay --> RelayLED ``` ## Key Components ### DMXIn — [NC3FAH1](https://www.flux.ai/jecstronic/nc3fah1~llc.md) - Connector Type: Circular Connectors - Connector Gender: Female - Manufacturer Name: Neutrik - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Manufacturer Part Number: NC3FAH1 - Role Details: Chassis mount XLR3 female for DMX input - Package: NC3FAH1 - Datasheet URL: https://www.mouser.com/datasheet/2/289/st-nc3fah1-1853786.pdf - Part Type: Connector **Pins:** - 1+G [pin 1] - 2 [pin 2] - 3 [pin 3] ### DMXOut — [Right Angle Male XLR Connector](https://www.flux.ai/corynrobinson/right-angle-male-xlr-connector~u7.md) - Connector Gender: Male - Part Type: Connector - Manufacturer Part Number: AC3MAH-AU-PRE - Role Details: Chassis mount XLR3 male for DMX output - Role: Connector - Connector Type: Circular Connectors - Package: AC3MAH-AU-PRE - Manufacturer Name: Amphenol - Datasheet URL: https://www.mouser.com/datasheet/2/18/1/AC3MAH_AU_PRE-2893794.pdf **Pins:** - GND [pin 1] - Negative [pin 3] - Positive [pin 2] - Shield [pin 4] ### ENC1 — [EC12D1564402](https://www.flux.ai/vasy_skral/ec12d1564402~1ol.md) - Package: Through Hole - Manufacturer Part Number: EC12D1564402 - Datasheet URL: https://datasheet.lcsc.com/lcsc/2011041404_ALPSALPINE-EC12D1564402_C444933.pdf - Role Details: Rotary encoder with integrated push switch for RDM address input - Manufacturer Name: ALPSALPINE - Part Type: Rotary encoder - Mount: Through Hole **Pins:** - A [pin A] - B [pin B] - C [pin C] - S1 [pin S1] - S2 [pin S2] ### IECIn — [DD21.0121.1111](https://www.flux.ai/randylbl/dd21p0121p1111~8y.md) - Purchase Url: https://www.mouser.com/ProductDetail/Schurter/DD21.0121.1111?qs=PdaBPmf3BcjZBoEYSXMwxA%3D%3D - Package: SCHURTER_DD21.0121.1111 - Manufacturer Part Number: DD21.0121.1111 - Role Details: Chassis mount IEC60320 C14 inlet for mains input - Manufacturer Name: Texas Instruments Inc. - Role: Connector - Part Type: Connector - Purchase Url: https://www.digikey.com/en/products/detail/schurter-inc/dd21-0121-1111/1646894 - Connector Type: Power Connectors - Datasheet URL: https://www.schurter.com/en/datasheet/typ_DD21.pdf **Pins:** - L - N - PE ### IECOut — [DD21.0121.1111](https://www.flux.ai/randylbl/dd21p0121p1111~8y.md) - Manufacturer Name: Texas Instruments Inc. - Part Type: Connector - Package: SCHURTER_DD21.0121.1111 - Manufacturer Part Number: DD21.0121.1111 - Role Details: Chassis mount IEC60320 C13 outlet for mains output - Purchase Url: https://www.mouser.com/ProductDetail/Schurter/DD21.0121.1111?qs=PdaBPmf3BcjZBoEYSXMwxA%3D%3D - Role: Connector - Connector Type: Power Connectors - Datasheet URL: https://www.schurter.com/en/datasheet/typ_DD21.pdf - Purchase Url: https://www.digikey.com/en/products/detail/schurter-inc/dd21-0121-1111/1646894 **Pins:** - L - N - PE ### K1 — [Relay-12VDC-SL-C](https://www.flux.ai/deadzerok/relay-12vdc-sl-c~zh.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_Ningbo-Songle-Relay-SRD-12VDC-SL-C_C30431.pdf - Manufacturer Part Number: SRD-12VDC-SL-C - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 15 A AC load switching relay - Role: Switching - Part Type: Relay - Package: FP_RELAY_SRD-12VDC-SL-C - Package or Case Code: RELAY-TH - Mount: Through Hole - Manufacturer Name: Ningbo Songle Relay **Pins:** - Coil-1 [pin COIL1] - Coil-2 [pin COIL2] - Com-3 [pin COM] - NC [pin NC] - NO [pin NO] ### LED1 — [150080RS75000](https://www.flux.ai/adrian95/150080rs75000~5t0.md) - Package or Case Code: C_0805_2012Metric - Manufacturer Part Number: 150080RS75000 - Manufacturer Name: Würth Elektronik - Datasheet URL: https://www.we-online.com/components/products/datasheet/150080RS75000.pdf - Role Details: DMX present and Relay ON LED indicators - Package: 0805 - Part Type: LED - Mount: Surface Mount - Role: Indicator - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### LED2 — [150080RS75000](https://www.flux.ai/adrian95/150080rs75000~5t0.md) - Package or Case Code: C_0805_2012Metric - Manufacturer Name: Würth Elektronik - Role: Indicator - Mount: Surface Mount - Manufacturer Part Number: 150080RS75000 - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ - Package: 0805 - Datasheet URL: https://www.we-online.com/components/products/datasheet/150080RS75000.pdf - Role Details: DMX present and Relay ON LED indicators **Pins:** - A [pin 2] - K [pin 1] ### SW1 — [JS102011JCQN](https://www.flux.ai/adrian95/js102011jcqn~oia.md) - Manufacturer Part Number: JS102011JCQN - Mount: Surface Mount - Role Details: DMX 120Ω termination switch - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Switch - Role: Switching - Manufacturer Name: C&K - Datasheet URL: https://www.ckswitches.com/media/1422/js.pdf - Package: Surface Mount **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### TVS1 — [PESD5V0S1BBN](https://www.flux.ai/lcsc/pesd5v0s1bbn~p22r.md) - Package or Case Code: D_SOD-523 - Mount: Surface Mount - Package: SOD-523_L1.2-W0.8-LS1.6-BI - Diode Type: Unidirectional TVS Diode - Manufacturer Part Number: PESD5V0S1BBN - Role: Protection - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_BORN-PESD5V0S1BBN_C314264.pdf - LCSC Part Number: C314264 - Reverse Voltage: 5V - Forward Voltage: 0.9V - Role Details: Transient voltage suppression on 5V logic rail - Part Type: ESD Protection Devices - JLCPCB Part Class: Extended Part - Manufacturer Name: BORN(伯恩半导体) - Product Info Url: https://lcsc.com/product-detail/Others_Bourne-Semicon-Shenzhen-PESD5V0S1BBN_C314264.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [ATSAMD21G18A-AU](https://www.flux.ai/adrian95/atsamd21g18a-au~p9s.md) - Package or Case Code: 32-TQFP - Part Type: Microcontroller - Package: 32-TQFP - Role Details: Main MCU for DMX/RDM control - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/SAM-D21-DA1-Family-Data-Sheet-DS40001882H.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Microcontroller - Manufacturer Name: Microchip Technology - Manufacturer Part Number: ATSAMD21G18A-AU **Pins:** - ~RESETN [pin 40] - GND1 [pin 18] - GND2 [pin 35] - GND3 [pin 42] - GNDANA [pin 5] - PA00 [pin 1] - PA01 [pin 2] - PA02 [pin 3] - PA03 [pin 4] - PA04 [pin 9] - PA05 [pin 10] - PA06 [pin 11] - PA07 [pin 12] - PA08 [pin 13] - PA09 [pin 14] - PA10 [pin 15] - PA11 [pin 16] - PA12 [pin 21] - PA13 [pin 22] - PA14 [pin 23] - PA15 [pin 24] - PA16 [pin 25] - PA17 [pin 26] - PA18 [pin 27] - PA19 [pin 28] - PA20 [pin 29] - PA21 [pin 30] - PA22 [pin 31] - PA23 [pin 32] - PA24 [pin 33] - PA25 [pin 34] - PA27 [pin 39] - PA28 [pin 41] - PA30 [pin 45] - PA31 [pin 46] - PB02 [pin 47] - PB03 [pin 48] - PB08 [pin 7] - PB09 [pin 8] - PB10 [pin 19] - PB11 [pin 20] - PB22 [pin 37] - PB23 [pin 38] - VDDANA [pin 6] - VDDCORE [pin 43] - VDDIN [pin 44] - VDDIO1 [pin 17] - VDDIO2 [pin 36] ### U2 — [ADM2587EBRWZ](https://www.flux.ai/vasyl/adm2587ebrwz~b2o.md) - Role: Interface - Package or Case Code: 20-SOIC - Package: 20-SOIC - Manufacturer Name: Analog Devices Inc. - Role Details: Isolated RS-485 transceiver for DMX/RDM - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/ADM2582E_2587E.pdf - Part Type: Integrated Circuit - Manufacturer Part Number: ADM2587EBRWZ **Pins:** - ~RE [pin 5] - A [pin 18] - B [pin 17] - DE [pin 6] - GND1 [pin 10] - GND1 [pin 3] - GND1 [pin 1] - GND1 [pin 9] - GND2 [pin 16] - GND2 [pin 20] - GND2 [pin 11] - GND2 [pin 14] - RxD [pin 4] - TxD [pin 7] - VCC [pin 8] - VCC [pin 2] - Visoin [pin 19] - Visoout [pin 12] - Y [pin 13] - Z [pin 15] ### U3 — [NMA0505SC](https://www.flux.ai/vasyl/nma0505sc~h9h.md) - Role Details: Isolated 5V–5V DC-DC converter for MCU and logic - Mount: Through Hole - Manufacturer Name: Murata Power Solutions Inc. - Role: Power Management - Part Type: Integrated Circuit - Manufacturer Part Number: NMA0505SC - Datasheet URL: https://www.murata.com/products/productdata/8807031013406/kdc-nma.pdf - Package: THT-8 **Pins:** - 0V [pin 5] - VIN- [pin 2] - VIN+ [pin 1] - VOUT- [pin 4] - VOUT+ [pin 6] ### U4 — [ULN2003A](https://www.flux.ai/lcsc/uln2003a~ek6r.md) - Manufacturer Part Number: ULN2003A - Role: Flyback / Freewheeling - JLCPCB Part Class: Extended Part - Part Type: Darlington Transistor Arrays - LCSC Part Number: C482013 - Product Info Url: https://lcsc.com/product-detail/New-Arrivals_UMW-Youtai-Semiconductor-Co-Ltd-ULN2003A_C482013.html - Package or Case Code: 16-SOP - Manufacturer Name: UMW(友台半导体) - Package: SOP-16_L10.0-W3.9-P1.27-LS6.0-BL - Role Details: Relay coil driver with built-in flyback diodes - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2311091735_UMW-Youtai-Semiconductor-Co---Ltd--ULN2003A_C482013.pdf **Pins:** - 1B [pin 1] - 1C [pin 16] - 2B [pin 2] - 2C [pin 15] - 3B [pin 3] - 3C [pin 14] - 4B [pin 4] - 4C [pin 13] - 5B [pin 5] - 5C [pin 12] - 6B [pin 6] - 6C [pin 11] - 7B [pin 7] - 7C [pin 10] - COMPO [pin 9] - E [pin 8] ### U5 — [TM1637_4-digit 7-segment indicator_Vertical](https://www.flux.ai/jecstronic/tm16374-digit-7-segment-indicatorvertical~8q9.md) - Datasheet URL: https://5.imimg.com/data5/MA/OB/MY-1833510/tm1637-based-4-bits-red-digital-tube-led-display-module.pdf - Part Type: Module - Package or Case Code: Module - Manufacturer Part Number: TM1637 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Rajguru eletronics - Package: Module - Role: Display Driver - Role Details: Driver for 4-digit 7-segment display (RDM address) **Pins:** - CLK [pin 1] - DIO [pin 2] - GND [pin 4] - VCC [pin 3] ### U6 — [3V 500mA LDO](https://www.flux.ai/corynrobinson/3v-500ma-ldo~0p.md) - Manufacturer Name: Texas Instruments - Role: Power Conversion - Operating Temperature: -40℃~+125℃@(Tj) - Part Type: Linear Voltage Regulators (LDO) - Package or Case Code: SOT-23-5 - Manufacturer Part Number: TLV75530PDBVR - Output Current: 0.5A - Product Info Url: https://www.digikey.com/en/products/detail/texas-instruments/TLV75530PDBVR/9356540 - Dropout Voltage: 238mV@(500mA) - Package: SOT-23-5 - Role Details: 3.3V LDO regulator for MCU power - Max Input Voltage: 5.5V - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftlv755p - Max Output Voltage: 3V **Pins:** - EN [pin 3] - GND [pin 2] - IN [pin 1] - NC [pin 4] - OUT [pin 5] ### U7 — [BAC05S05DC](https://www.flux.ai/kicad-part-library/bac05s05dc~hin.md) - Package or Case Code: Converter_ACDC_Murata_BAC05SxxDC_THT - Part Type: Converter ACDC - Datasheet URL: https://www.murata.com/products/productdata/8809982558238/KAC-BAC05.pdf - Package: Converter_ACDC_Murata_BAC05SxxDC_THT - Mount: Through Hole - Role Details: Auxiliary isolated AC-DC converter (100–240VAC to 5V 1A) - Manufacturer Part Number: BAC05S05DC - Role: Power Conversion **Pins:** - -Vo [pin 4] - +Vo [pin 5] - AC/L [pin 2] - AC/N [pin 1] - NC [pin 3] ### Y1 — [32kHz Crystal Oscillator](https://www.flux.ai/corynrobinson/32khz-crystal-oscillator~qm.md) - Manufacturer Name: Abracon - Frequency: 32.768kHz - Package or Case Code: CSMD - Role: Oscillator - Manufacturer Part Number: ABS07-32.768KHZ-T - Part Type: Oscillator - Package: CSMD - Datasheet URL: https://octopart.com/datasheet/abs07-32.768khz-t-abracon-657766 - Role Details: RTC/DFLL reference for part U1, pins XIN/XOUT **Pins:** - P1 - P2 *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ganiered/dmx-relay~q5](https://www.flux.ai/ganiered/dmx-relay~q5).* --- *Generated from [https://www.flux.ai/ganiered/dmx-relay~q5](https://www.flux.ai/ganiered/dmx-relay~q5)*