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What's
the isolator unit used for? |
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Our
system consists of various manufacturers' instruments, and sometime
we meet errors of unknown origin. Each manufacturer of the system
says their part of system has no problem. Any idea ? |
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Can
you tell us how to minimize a destruction of instruments at control
room site caused by a field instrument trouble? |
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It is said
that the grounding at two locations would cause errors. Why? How
can I handle the problem? |
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At
start up of our control system, we can detect signal influences
between different instruments. Is there a simple solution for this?
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The output
signal response decreases after installing an isolator unit into
a loop for data-logging of vibration analysis. Any solution ? |
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We have
a requirement for a contact signal from the field to be input into
a computer. Can M-System's Model M2SV handle this? |
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Can we
use a loop power supply unit as an isolator unit having 4 - 20mA
DC as the input signal? |
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I want
to convert the difference (absolute value) of 2 signals A and B
to 4-20mA DC. Please explain the method and a transmitter to be
used. |
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I
want to transmit instantaneour value (4-20mA DC) of CT current
(0-5A AC) on a power panel in the field to a monitoring room as
well as get a high alarm contact signal. However there is not
instrument power on site and transmitters cannot be installed
there. |
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Standard M2VS
output is up to 12V, but I need 0-15 Vdc. |
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I
plan to indicate a flow signal 4-20mADC (corresponding to 0-2000
l/h) used in a plant on two indicators with different scaling.
The existing indicators are A. 4-20mA DC input with the scale
0-1500 l/h and B. 0-5V dc input with the scale 0-100 l/h. I want
to used them. the actual flow does not exceed 1000 l/h. can i
deal with this with a single transmitter and adjusting the scaling? |
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When tank level
of irregular shape is being measured with the use of a level transmitter,
it takes a lot of troubles to measure the volume of tank. |
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Air flow from
a blower is being controlled remotely with a flow setter (angle
setter of a damper), which is very difficult to set the air flow.
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Interface problems
with the proliferation of systems in plants |
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PLC product
lines with NON-isolated analog inputs |
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An
engineering company had specified an analyzer and a DCS system.
During startup they discovered that both devices were trying to
power the loop. Additionally the DCS was providing a common power
supply for multiple loops. |
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What is the
difference between 2-wire and Loop-powered? |
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We
want to get 4-20mA DC from a control circuit to provide the signal
to a speed controller. However, one problem is that there is a
difference in electric potential (50 to 100V) between each of
the ground, the control circuit and the speed controller. what
can we do in this case? |
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The "master"
drive must control four separate "slave" drives from a
single 4-20mA DC signal. |
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How to beat
loop impedance constraints |
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Current-to-voltage
transducers give strange output readings. |
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Which type
of isolators to choose from? |
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"super"
SV unit |
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To
monitor a solar power system, we measure an output voltage of
its system and want to receive an alarm outputs if the measuring
value fell than a set value. We had used a DC Alarm, model AS4V
previously, but this time, the measuring voltage range is to be
0-1,000Vdc which is not able to input directly to the AS4V. Additionally,
our existing panel room is not so large.
Do you have any good idea to solve our problem? |
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We
have replaced an old, out-of-order pressure transmitter which
outputs 10-50 mAdc. The new one, on the other hand, outputs 4-20
mAdc, so we have also purchased a 4-20 mA current loop supply
model M2DY-A-M to power the transmitter.
The only instrument we do not want to replace is the expensive
receiving instrument in the control room which is suitable only
for 10-50 mA signals, and is still in good working order.
We have to find a way to convert 4-20 mA into 10-50 mA signals
to maintain the compatibility between the field and the control
room.
Does M-System have a suitable transmitter for this application? |
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We
are preparing UPS in our power monitoring system for system backup
purpose in case of blackout. On a power monitoring panel, we also
want to monitor UPS’s charging condition by using digital
indicator. Does M-System have any transmitter for this application?
For your reference, our UPS’s battery capacity is 12 Vdc
at full charging. |
