12-32 Vac or 10-48 Vdc power supply (left)
85-264 Vac or 90-300 Vdc power supply (right)
Laureate™ digital panel meters, digital counters and 6-digit remote displays offer a choice of two high-frequency switching power supplies. These provide stable, isolated power for instrument operation plus excitation outputs at a substantially reduced weight and over a broader range of input voltages and power frequencies than conventional linear supplies.
Each power supply provides three jumper-selectable, isolated excitation outputs: 5 Vdc at 100 mA, 10 Vdc at 120 mA, or 24 Vdc at 50 mA. These outputs can be used to power external sensors, transmitters and up to four 350 ohm load cells in parallel, thereby avoiding the need for an expensive external supply. When powering a load cell or potentiometer, a ratiometric operating mode can be selected, where the meter monitors the excitation supply and removes the effects of voltage variation.
In addition to the isolated excitation output, regulated 5 Vdc at up to 50 mA is brought out and can be used to power external logic.
Both power supplies and their connectors (standard) are designed to UL/IEC/CSA safety standards. The two supplies also do double-duty by providing two connector inputs (A & B) and a digital ground for signals such as meter hold, reset, tare, etc. These signals do not affect power supply operation.
|LPS1||85-264 Vac or 90-300 Vdc|
|LPS2||12-32 Vac or 10-48 Vdc|
|Frequency||DC and 47-63 Hz|
|Power consumption||5.3 W max|
|LPS1||On-board fuse rated 0.5A, 277 Vac, UL Recognized|
|LPS2||On-board fuse rated 2.5A at 250 Vac or 63 Vdc, UL Recognized|
|Excitation Power Supply|
|Selectable outputs||5 Vdc ± 5%, 100 mA|
|10 Vdc ± 5%, 120 mA|
|24 Vdc ± 5%, 50 mA|
|Ripple||50 mVp-p max|
|Isolation to power ground||250V rms working, 2.3 kV rms per 1 min test|
|Isolation to meter ground||50 Vp|
|Pin Assignments (power and digital controls)|