Data Loggers, Portable Remote Site Loggers, Low Power Multi-Channel

Field sensor power... current loops and / or voltage excitation source Powered from system batteries or external power Installs into ModuLogger, Mini and HyperLogger™ data logging systems Control input for battery life extending ON/OFF control via logger software Rugged design to take abusive field conditions Field programmable output voltages..5, 10, 15, and 24Vdc (custom voltages are available!) Low-Power design for optimum battery life		5, 10, 15, 24 VDC Loop / Sensor Power Module Datasheet (PDF)

Overview

The PSM Power Supply Module is a rugged module that can be used to provide excitation power for sensors used with the ModuLogger, Mini and HyperLogger™ portable and remote site data logging and alarming systems. The PSM-x can supply 100mA of current... sufficient to power up to five 4-20mA loops. Alternatively it can be used as a voltage source for sensor excitation. One 5Vdc output is standard. An additional voltage output is available which can be field jumper programmed in the field for 10, 15 or 24Vdc output (custom output voltages are available. Contact Logic Beach.

Four standard packaged versions of the PSM are available for use with the HyperLogger™, ModuLogger and Mini portable data logging systems. The PSM is offered as a stand-alone module, or can be incorporated into loggers. The PSM 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. 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 via terminal strip connections on the PSM.

The PSM 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.

Package Configurations

The PSM-X is offered in four standard configurations as specified by the part number. Please note that special output voltages can be provided for a minimal additional charge.
PSM-2: A metal case housed stand-alone module typically used for door mounted installation into the HyperLogger™ system. The module is equipped with mounting tabs containing threaded inserts for surface mounting. A pluggable terminal strip provides for easy connection / disconnection of the control, external power, and output voltages.
MLPSM-2: A PSM mounted into the standard ModuLogger stacking frame for installation into the ModuLogger or Mini data logging systems stack. A pluggable terminal strip provides for easy connection / disconnection of the control, external power, and output voltages. Typically this model would be specified if sensor power is desired but the ML-BATT (six D-cell battery pack option for the ModuLogger or ModuLogger "Mini") module is not.
MLBATT-PSM2: A PSM is incorporated into the standard ModuLogger / Mini ML-BATT module (six D-cell plug-on battery pack). A terminal strip provides for easy connection / disconnection of the control, external power, and output voltages.
PSM2-PP: A stand-alone portable power supply including 6 D-Cells and the PSM in a small (4.8 x 8.8 x 2.9) package. This supply is a versatile power source for use with other data acquisition, control and annunciator equipment providing power for sensor and loop excitation as well as instrument power.
HyperWare™ Implementation The PSM outputs can be cycled ON/OFF with a 5Vdc control signal such as one of the Digital Outputs provided standard in the ModuLogger, Mini and HyperLogger™ data logging systems. With the logger programmed to turn the PSM outputs ON just prior to sampling the sensor output, then cycling the power OFF immediately after the reading, battery life can be radically extended. Sensor excitation is easily programmed into the data logger via the Logic Beach HyperWare™ data logger programming sofware. The sample HyperWare Program Net illustrates the use of the "Warm-Up" icon to turn on a Digital Output (which is physically wired to the PSM control input) turning on the PSM power supply outputs.

System Specs

Terminal Strip:	12 position strip for connection of external power input, control signal input, and the programmable and 5 Vdc outputs and ground.
Pigtail Connection:	a pair of pigtails is provided for direct interface to the HyperLogger™, ModuLogger and Mini battery pack. In the ModuLogger and Mini implementation, the PSM is wired in series between the battery pack (ML-BATT) and the CPU module using the two provided pigtails and mating polarized connectors.
Status Indicators	Output "ON" LED indicator
External Power Input:	8 - 32Vdc input
Control Signal Input:	Field Programmable for Hi Input = ON or Lo Input = ON (LO = 0 to 0.5Vdc ; HI = 3 to 20Vdc) Control current = 400uA at 5 Vdc (On)
Power Supply Output #1:	Programmable Vdc* Output : Ranges: 10, 15, or 24Vdc (jumper programmable) Accuracy: +/- 300 mV (special trim available) Current: 100mA** (short circuit protected)
Output #2:	Fixed 5 Vdc Output: Accuracy: +/- 150mV Current: 40mA (short circuit protected)
Parasitic Current (Outputs Off):	300uA typical
Circuit Protection:	Continuous short circuit protection on outputs. Reverse polarity protection on inputs
Operating Temperature Range:	-40C to 70C

* Tighter tolerance and custom voltage outputs from 7 to 25Vdc available. Contact Logic Beach for details.
** Current output capability varies as a function of programmed output voltages due to thermal concerns.

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