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Laurel Electronics provides
digital panel meters / controllers, totalizers, counters, loop-powered meters,
temperature meters, for all types of transducers or process indication &
control. |
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Laureate™
Power Options
For 85-264 Vac, or 8-28 Vac & 9-37 Vdc Input,with 5, 10 & 24 Vdc
Excitation Output
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| 85-264
Vac & 90-370 Vdc |
8-28
Vac and 9-37 Vdc |
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Features |
Lightweight,
high-frequency switching power supply design. |
85-264
Vac or 90-370 Vdc input is standard. Includes 250 Vac,
0.1A resettable fuse.
Allows worldwide AC operation without hardware modification. |
8-28
Vac or 9-37 Vdc power option.
Allows operation from batteries or 28 Vac, 400 Hz aircraft
power. |
Three
selectable isolated excitation outputs:
5 Vdc at 100 mA, 10 Vdc at 120 mA, or 24 Vdc at 50 mA. |
Certificate
of compliance to UL 3101-1, CAN/CSA-C22.2, and EN 61010-1
safety standards. |
Certification
issued by CSA, a Nationally Recognized Test Laboratory
(File No. 212851). |
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| Description |
Laureate™
digital panel meters, digital counters and 6-digit remote
display 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
High voltage AC or DC power. The standard
Laureate supply accepts power from 85 to 264 Vac, 47
to 440 Hz. This allows the same meter to operate worldwide
without modification. The supply also accepts 90 to
370 Vdc.
Low voltage AC or DC power. An optional
low voltage supply operates from 9 to 37 Vdc or 8 to
28 Vac, 47 to 440 Hz. This supply allows the Laureate
to be powered from batteries or from 28 Vac, 400 Hz
aircraft power
Isolated Excitation Output
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, 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
Wiring of Excitation
Output
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4-wire 4-20 mA transmitter
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4-wire 4-20 mA transmitter
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With
four-wire transmitters,
two wires are used to apply 10 or 24 Vdc, and
two separate wires are used to sense the transmitter's
4-20 mA output
With two-wire transmitters, the
same two wires are used to power the transmitter
and carry the 4-20 mA output, which is made to
flow across an internal 10 ohm resistor between
pins 3 and 4.
Both power supplies and
their connectors (standard) are designed to UL/IEC/CSA
safety standards. The two Laureate power
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. |
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| Operating
Power |
Excitation
Power Supply |
Voltage
(std)
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85-264
Vac or 90-370 Vdc |
Selectable
outputs
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5
Vdc ±5%, 100 mA max
10 Vdc ±5%, 120 mA max
24 Vdc ±5%, 50 mA max
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Voltage
(opt)
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8-28
Vac or 9-37 Vdc |
Ripple |
50
mVp-p max
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Frequency
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DC
and 49-440 Hz |
Isolation
to power ground |
Safety-rated
to 250 Vac, 4.2 kVp per High Voltage Test |
Power
consumption |
5.3
W max |
Isolation
to meter ground |
50
Vp |
| Pin
Assignments |
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FLW,
Inc - 3505
Cadillac Ave - Bldg E - Costa Mesa, CA. - 92626 - USA - Ph (714) 751 -
7512 - Fax (714) 751 - 0213
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