Rosahl Solid State Humidity Control
Power Supplies
To achieve the expected performance from your Rosahl membrane dehumidifiers, it is important to use a suitable power supply (PSU). Moisture held within an unused dehumidifying membrane can cause high inrush currents on start up.
Selecting your power supply (PSU)
Moisture within the dehumidifying membrane can cause high inrush currents on start up. The manufacturer recommends a constant current limiting PSU with an output current suitable for the rating of the membrane used. However, these are not always available. Fold-back type PSUs may be suitable provided the output voltage does not fall below 1.8V DC during overload conditions.
To simplify the selections, we list below a selection of power supplies that meet the requirements of the membrane without causing nuisance tripping.
Power supply for compact membranes PD, RD and RS Series
The VREG Series power adapter boards connect to a standard USB power source and adapt it to the 3V DC needed for the Rosahl membranes. They are fitted with a USB-C connector on the board.
The VREG1 delivers 3V DC at 500mA with fold-back current limiting, and solder pads for output connections. It is suitable for use with all PD, RD and RS membranes.
Power supply for small membranes M-1J,M-2J, M-3M and M-3J Series
The VREG2 delivers 3V DC at up to 3000mA with fold-back current limiting and solder pads for output connections. It is suitable for use with all M-1J, M-2J, M-3M, M-3J membranes 3000mA.
Coming soon
Optional VREG mounting base
This simple base mounting module accepts the VREG1 USB-C power adapter board designed for the PD, RD and RS Series and the VREG2 version designed for the M-IJ, M-2J M-3M and M-3J Series membranes.
Optional VREG barrel mounting
This simple barrel mounting module accepts the VREG1 USB-C power adapter board designed for the PD, RD and RS Series and the VREG2 version designed for the M-IJ, M-2J M-3M and M-3J Series membranes.
Switching power supplies
A range of semi-enclosed and open board type switching power supplies (PSUs) suitable for use with Rosahl membranes is available from Westside International. They have an input voltage range of 85 to 264V 50/60Hz and an adjustable 3V DC output. They are RoHS compliant. Select the correct model from the table.
Typical open board power supply
Coming soon