orc
aramder
Open replacement controller board for surplus Motorola PMUN1046A relay boxes: ESP32-C3, CANopen control, 10 x 15 A channels. Independent project, not affiliated with Motorola Solutions.
Components (25)
| Reference | Value | Description |
|---|---|---|
| Q6,Q10,Q14,Q15,Q18,Q20,Q22,Q24,Q26,Q28 | MMBT3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, SOT-23 |
| Q8,Q12,Q16,Q17,Q19,Q21,Q23,Q25,Q27,Q29 | AO3401A | -4.0A Id, -30V Vds, P-Channel MOSFET, SOT-23 |
| U1 | PCA9555PW | IO expander 16 GPIO, I2C 400kHz, Interrupt, 2.3 - 5.5V, TSSOP-24 |
| U2 | AMS1117-3.3 | 1A Low Dropout regulator, positive, 3.3V fixed output, SOT-223 |
| U3,U4 | LMR50410 | Simple Switcher Buck Regulator, Vin=4-36V, Iout=1A, Adjustable output voltage, SOT-23-6 package |
| U6 | SN65HVD230 | CAN Bus Transceivers, 3.3V, 1Mbps, Low-Power capabilities, SOIC-8 |
| U7 | ESP32-C3-SuperMini | |
| U9 | ADuM1250ARZ-RL7 | Dual-channel I2C digital isolator, Bidirectional communication, 3V/5V level translation, SOIC-8 |
| C13,C17-C21,C28 | 100nF 50V | Unpolarized capacitor |
| C22-C27,C29,C30 | 10uF 50V | Unpolarized capacitor |
| D8-D16,D18,D19 | SS34 | |
| D17 | 10x SS34 | |
| J5 | 01x02 | Generic connector, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J6 | 5.08mm Screw Terminal | Generic connector, single row, 01x04, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J7 | Harness, 14-pos 0.1in THT | Generic connector, single row, 01x14, script generated (kicad-library-utils/schlib/autogen/connector/) |
| L3,L4 | 33uH | Inductor |
| R13 | 10k 0.1% | Resistor, US symbol |
| R14 | 120 1% | Resistor, US symbol |
| R18 | 6.2k 1% | Resistor, US symbol |
| R19 | 2.7k 1% | Resistor, US symbol |
| R20-R23 | 10k 1% | Resistor, US symbol |
| R26-R35,R38 | 10k 5% | 4 resistor network, parallel topology, split |
| R36 | 24k 1% | Resistor, US symbol |
| R37 | 3k 1% | Resistor, US symbol |
| SW2 | SW_DIP_x04 |