The PSM-2 Power Supply Module is a rugged module that can be used to provide excitation power for sensors, transducers and transmitters used with Logic Beach portable and remote site data logging and alarming instruments.  In many field applications, excitation voltages required to power transducers may be greater than the batteries (commonly 9 to 12Vdc) powering the data logger and associated equipment.   The PSM-2 can be used to step-up this lower battery voltage to 10, 15 or 24Vdc meeting the excitation needs of most transducers.  The PSM-2 can supply 100mA of current… sufficient to power up to five 4-20mA loops.  The main supply output can be field jumper programmed in the field for 10, 15 or 24Vdc output (custom output voltages are available. Contact Logic Beach).   Additionally, there is a second fixed 5Vdc output.

The PSM-2 draws its power from the standard data logger D-cells or an external supply. For connection to the logger D-cells, a pigtail with mating connector projects from the PSM-2. This pigtail can then be used to connect to the mating connector provided on the Logic Beach data logger battery pack. Alternatively, external power can be supplied to the PSM-2 via terminal strip connections.  Terminal strip connections are provided for easy connection of multiple transducers.

The PSM-2 outputs are cycled ON/OFF by a low-level control input from the associated logger. Typically, this control input is controlled by an output from the associated logger, providing power only as required for sampling… minimizing power consumption and maximizing battery life. An LED indicator lights when the outputs are ON providing visual feedback of operation during installation.