This project is a small carrier board for the Power DSine PCR-SIN06V24F00 4W Ring Generator. It takes -24VDC as input and supplies isolated 86Vrms / 20Hz ringing current at 4 REN.
Stuffing options are provided for DC-biasing the output.
The board is 1.75”H x 3.93”W for mounting on a 2” relay panel such as the WE 755A PBX Power Supply.
A 3D-printed cover is included. For safety, it’s a good idea to print this using V-0 PETG. To mount the board with cover, use 4ea M3-10mm male/female standoffs for the bottom side of the board. Use 4ea M3-20mm female standoffs for the top side of the board. Mount the cover with 4ea M3 screws.