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Description
The Q501 is a DIN rail mount,
DC input, single or dual channel,
two- wire transmitter. Each
channel accepts a DC voltage
or current input and provides
an isolated 4-20mA output. Each
channel is fully isolated (1800VDC)
from input to output and channel
to channel.
All
I/Q modules feature SnapLoc
plug-in screw terminals for
easy installation and low Mean-Time-To-Repair
(MTTR). Two or more modules
can slide together and interlock
for solid, high density mounting.
This is accomplished by removing
either the foot, or the adjacent
unit's faceplate (for right-hand
side or left-hand hand side
mounting, respectively). The
module to be attached will easily
slide on to the side of the
mounted unit.
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Application
DC input, two-wire transmitters
are used to isolate and convert
a DC voltage or current into
a proportional 4-20mA signal.
Two- wire transmitters are primarily
used in remote locations near
the sensor since they reduce
the probability of signal errors
and save wiring costs by utilizing
the two power wires to send
the 4-20mA signal. The current
signal is usually monitored
by a control system or displayed
for an operator.
Typically,
DC voltages or currents from
various field instruments (e.g.
level, flow, pressure and position
sensors) are used to monitor
and control a manufacturing
process. Voltage signals can
only run a short distance to
a panel without errors caused
by noise or lead resistance
in the wires. These sensor (voltage)
signal wires are usually terminated
at the two-wire transmitter
and converted into a 4-20mA
signal which is highly immune
to noise and not affected by
lead resistance, both of which
can cause significant errors
in voltage signals transmitted
over long distances.
The
1800VDC isolation capability
of the Q501 prevents ground
loops from causing errors in
DC voltage or current signals
and can reduce susceptibility
to Radio Frequency Interference
(RFI). Isolation also provides
protection from high voltages
and current spikes which can
damage expensive Supervisory
Control And Data Acquisition
(SCADA) equipment, such as a
PLC or DCS.
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