Honeywell R4500 Classic Data sheet
DR4500A Classic Series
Circular Chart Recorder
Function
Honeywell’s Classic Series recorder
combines the simplicity of pen drawn
analog traces with the sophistication
of microprocessor controlled
functions. This combination results in
a user configurable recorder that is
easily adapted to meet a variety of
application requirements—from blast
furnace to laboratory.
In addition to recording analog traces,
the Classic Series recorder
continuously displays process variable
values in the selected engineering
units.
Both one-pen and two-pen models
accept inputs from any one of a
variety of sensors or transmitters
within the configurable range limits.
Also, models are available with one or
two digital controllers to generate
controlled output signals to operate
valves, dampers, heating elements,
etc. for process control.
Figure 1—Classic Series recorder provides analog trace and
continuous digital indication of process variable value.
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Specification
20992
Features
• Charts — Over 5000 preprinted
charts are available to meet specific
recording needs.
• User configurable — means that
users can set and/or alter operating
parameters to fit their requirements,
including type of input, without
recalibration.
English language prompts, coupled
with simple keystroke sequences,
make configuring the recorder easy
and straightforward.
• Operator interface — includes
clear, brilliant alphanumeric displays;
indicators; deviation bargraph; and
keypad for visual and tactile
interaction.
• Ink cartridge — Disposable, fibertip ink cartridge for reliable recording
with minimal maintenance.
• Control Output — up to two versatile PID digital controllers lets users
configure the exact control action
needed for their process.
• Alarms — Integral "soft" alarms are
easily set by users to announce
selected out-of-limit conditions.
Features, continued
• Setpoint Ramp — A single setpoint
ramp is user programmable and is
easily repeated and activated through
the Run/Hold key.
• Setpoint Rate — lets you define a
ramp rate applied to any local
setpoint change. A separate upscale
or downscale rate is configurable.
• Set Point Ramp/Soak
Programming — Lets users program
and store 18 ramp and 18 soak
segments. Run or Hold of program is
keyboard or remote switch
selectable. For each control loop, you
can build up to 6 profiles using any
number of consecutive segments of
the program. You can select a
recovery mode for powerup.
• Accutune II™ — This standard
feature provides a new, truly plug and
play tuning algorithm, which will, at the
touch of a button or through a digital
input, accurately identify and tune any
process including those with deadtime
and integrating processes. This speeds
up and simplifies start-up plus allows
re-tuning at any setpoint.
Features, continued
• Fuzzy Logic — This standard feature
uses fuzzy logic to suppress process
variable overshoot due to SP changes
or externally induced process
disturbances. It operates independently from AccutuneII tuning. It
does not change the PID constants,
but temporarily modifies the internal
controller response to suppress
overshoot. This allows more
aggressive tuning to co-exist with
smooth PV response. It can be
enabled or disabled depending on the
application or the control criteria.
External Interface
Selections
• Alarm Output — Ties “soft” alarms
to up to two integral SPST relays to
activate users external equipment.
• Modbus
option allows you to network your
recorders to take advantage of overall
monitoring of the system using an
RS485 network.
Communications —
Industrial Measurement and Control, 1100 Virginia Drive, Ft. Washington, PA 19034
Printed in U.S.A. © Copyright 2002—Honeywell
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External Interface
Selections, continued
• Timer — This optional feature
provides a configurable time period
of 0 to 99 hours, 59 minutes or units
of minutes and seconds. It can be
started via the keyboard, alarm 2, or
by a digital input. The timer output is
Alarm 1, which energizes at the end
of the Timer Period. Alarm 1 can be
automatically reset. The Timer
Period can be changed between
each batch. Status is shown on the
lower display
• Digital Input — Allows users to initiate, from a remote location through
two dry contact closures, selected
recorder functions, such as switching
from automatic to manual control
mode, from direct to reverse
controller action, or reset totalizer.
• Auxiliary Output — there is also a
4 to 20 mA current output available.
It can be used to retransmit a
process variable. In addition, the
4-20 outputs on the control board
can be used as an auxiliary output if
not used for control.
Options
• Two Totalizers — one or two
totalizers are available. Eight digit
totals with multiplier on digital
display.
• Chart Illumination — Lights the
chart area to improve readability in
lower light areas.
• Door Options — Choice of gray,
black or blue doors with standard
latch or optional lock.
Optional UL and FM approved
NEMA4X door available.
• CE Mark — Conformity with
73/23/EEC, Low Voltage Directive
and 89/336/EEC EMC Directive.
• Approval Body Options — FM
approval, CSA certification and UL
Listing or a combination is available.
• Customer ID Tag — (30 characters
max.)
*Restrictions apply -- Not all of the options
an be supplied together
1
ALM
CHN
RSP
OUT
F
X HR
CHRT SP
A
%
FUNC
SET
UP
LOWR
DISP
MAN
AUTO
Figure 2—Operator interface includes displays and keypad for
comprehensive interaction with the recorder and the process.
User Configurable
In the Classic Series recorder,
microprocessor control replaces
conventional electro-mechanical
recording techniques. This means
that the recorder’s capabilities are
now primarily determined by its
software.
Since Honeywell has preprogrammed
a variety of functional capabilities into
the recorder, a user only has to
configure those functions that are
specific for the given application.
The user configures the recorder by
following English language prompts
that appear in the digital displays.
The configuration data (type of input,
chart speed, chart range, alarm
settings, tuning constants, etc.) are
stored in non-volatile memory for
safe keeping in the event of a power
failure.
Operator Interface
Two digital displays present the
process variable (PV) value and by
key selection, the controller set point;
controller output; deviation from
reference input; dry bulb temperature;
totalization value; or engineering units
as desired.
The lower display can also be set
scroll or hold.
In configuration mode, digital displays
are pre-empted by English language
prompts and values that you use to
enter configuration data. Indicators
light to show alarm condition, which
channel PV is on display, use of
remote set point, which output relay is
on, selected temperature unit, and
controller’s mode of operation.
Operator Interface, cont.
A deviation bargraph lets operators
tell at a glance if the process variable
is at, above, or below the controller’s
setpoint.
The keypad through which configuration data is entered also serves as
an integral automatic/manual station
that provides bumpless transfer for
controllers.
On two-pen models, the Hold key
allows continuous display of one
channel process variable while the
recording action proceeds
automatically.
Microprocessor
Controlled Recording and
Printing
Both the chart and the pen are driven
by stepper motors which are
controlled by the microprocessor
for precise maintenance free
operation.
Since chart speed is configurable,
users can easily alter the chart speed
through the keypad. Gear changing or
additional motors are no longer
required.
The stepper motor accurately
positions the pen drive without
damping, thus eliminating the need for
slidewire feedback gearing and drive
cables.
A configurable deviation recording
function lets users show graphically
the difference between reference
input and a process variable input.
Users can designate the channel 1
input or enter a deviation setpoint
value as the reference input. This is
an example of the versatility derived
from microprocessor controlled
recording.
CHART
RUN
HOLD
20951
Input Processing
The input can be one of many
standard low-level electrical signals.
And, for models with 2 pens, a
relative humidity (wet/dry bulb)
actuation is available using 100 ohm
platinum bulbs (α = 0.00385). The
input type and range are user
configurable.
Ranges are easily expanded and
compressed within their span
limitations to meet specific
measurement needs. Users can
select upscale or downscale sensor
break protection for many of the
actuations.
Each input is sampled at a rate of 3
times per second. Each sample is
amplified and then converted to a
digital signal, which is isolated and
passed to the microprocessor.
A digital filter with configurable time
constants lets users apply input
signal smoothing as desired.
All non-linear inputs are linearized by
the microprocessor, using look-up
tables that reside in the software.
This allows mixed input actuations
for 2-pen models to be recorded on a
linear chart. Users can bypass
linearization for recording on a nonlinear chart.
An integral 24 Vdc power supply,
along with 4-20 mA input
configuration, allows direct operation
with up to two transmitters without
the need for any additional/external
transmitter power supply.
To totalize a variable, such as a flow
signal, users select the applicable
input and set the digital display
scaling factor through configuration.
This eliminates the need for
additional integration hardware
including a mechanical counter. The
totalizer has an eight-digit display.
Also has capability to reset the
totalizer remotely with digital inputs,
and a low flow cutoff can be set in
percent of range below which the
applicable totalizer does not
increment.
Digital Controller
The DR4500A Series recorder
controller (1 or 2 loops) includes an
integral microprocessor-based PID
controller.
A variety of output types, including a
duplex variation for heat-cool
applications, lets users select the
output that is right for their final
control element.
Depending on the output type users
can configure the control action as
On-Off, PID-A, PID-B or PD with
Manual Reset.
As with the record functions, English
language prompts quickly guide
users through the entry of all the
controller’s configurable parameters.
Diagnostics
All DR4500A Series recorders
include self-diagnostic systems that
check critical operations and provide
error messages to alert users about
detected faults.
Power-up self-diagnostics is a
microprocessor controlled diagnostic
program that runs tests on selected
circuitry when the recorder is
powered up.
A “key” test allows a user to initiate,
on demand, a self-diagnostic routine
that checks the keypad and front
panel displays.
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Construction
The DR4500A Series recorder is
housed in a molded case, which can
be panel or surface, mounted.
A gasketed door with a glass or
optional acrylic window protects
internal components from harsh
industrial environments while allowing
easy access to the chart and operator
interface.
Circuitry is partitioned on printed
circuit boards for ease of service.
A UL and FM approved NEMA4X
door is also available.
Process Interface
Power, input, and output wiring
connect to terminations inside the
case.
Knockouts in the sides and bottom of
the case accept conduit connections
for convenient wire entry.
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Specifications
Design
Digital Indication Accuracy
Minimum Input Span
Input Impedance
Source Impedance
Span Step Response Time
Sampling Rate
Input Filter
Digital Displays
Indicators
Deviation Bargraph
1 digit
Range is fully configurable with span limitation of the operating range selected.
4-20 mAdc: 250 ohms
0-10 Vdc: 200K ohms
All others: 10 Megohms
RTD: 100 ohms per lead maximum
6-seconds maximum with no filtering
Each input sampled 3 times a second.
Software: Single pole low pass section with selectable time constants (off to 120
seconds).
Vacuum fluorescent, alphanumeric.
A six-digit display dedicated to the process variable.
Alternate information displayed during configuration mode.
An eight-digit display shows key selected operating parameters. Also provides
guidance during configuration.
Channel PV display (CHN 1 or 2)
Alarm status (ALM 1, 2)
Controller Output (OUT 1, 2)
Remote Set Point (RSP) for Control 1
Temperature unit (F or C) or Engineering units
Controller’s mode (A or MAN)
21 segment, color coded deviation bargraph:
Green (large) = On Control
Green (Small) = Deviation to ± 10% of PV
Controller Modes of Operation
Transmitter Supply Voltage
Manual Operation
Automatic with local set point
Automatic with remote set point
22 to 26 Vdc at input terminals (50 mAdc at 24 Vdc)
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