PS-VM-RD

A versatile DIN-mounted power supply, voltage measure and relay drive unit.

Specifications

Power Supply (+5VDC@500mA, +12V@40mA, -12V@40mA)
AC voltage measure (12x 250VAC inputs @min 50kHz, multiplexed) over SPI
Relay drive (2x CPU-controllable 230VAC fuse-protected (5) outputs)
2x thermistors (multiplexed, over SPI)
2 additional user-controllable LEDs over SPI
16 pin connector for CPU control and DC power output
Logic works through 74HCT, input signal range is from 3.3V CMOS to 5V TTL. Output is always 5V (for a 3.3V-tolerant CPU, a 4.7k resistor is required on SDO)
4-unit wide DIN (IEC 60715 TH 35-7.5 or TH 35-15) rail mounted IP2X-rated enclosure

Usage examples

Simple oscilloscope

This project uses a RaspberryPi Pico and a 3.25" ILI9341 touch display to enable/disable the relay outputs and display the measured data in a user friendly way ; the 4 buttons are connected on a single ADC pins so that all combinations can be reported.

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Files/Downloads

First-hand

User manual and schematics (PDF)
IEC 61010-1 Certification Report (PDF)

Third-party

These documents are provided because their specifications are part of the safety requirements for IEC compliance.