PRECISION DIGITAL Helios PD2-6080 User manual

• Large 1.80" Digits
• Dual-Line 6-Digit Display
• Readable from up to 100 Feet (30 Meters) Away
• Superluminous Sunlight Readable Display
• NEMA 4X, IP65 Rated Field Mountable Enclosure
• Operating Temperature Range of -40 to 65°C (-40 to 150°F)
• Modbus®RTU Master, Slave, or Snooper Mode
• Poll and Display up to 16 Process Variables
• Addition, Difference, Average, Multiplication, Division, Min,
Max, Weighted Average, Ratio, Concentration, & More
• Universal 85-265 VAC, or 12-24 VDC Input Power Models
• 2 or 4 Relays + Isolated 4-20 mA Output Options
• Onboard USB & RS-485 Serial Communication Options
• Program the Meter from a PC with onboard USB and ScanView
• UL & C-UL Approved
MODBUS
SCANNERS
Helios Super Snooper
Modbus®Scanners
Precision Digital corPoration
PD2-6080/PD2-6081
PD2-6080
Actual Size Digit
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PD2-6080/PD2-6081 Helios Super Snooper Modbus
®
Scanners
TAKE ADVANTAGE OF YOUR MODBUS
ENABLED TRANSMITTERS
The Helios PD2-6080/81 Super Snooper Modbus Scanners are
multi-purpose, easy-to-use scanners that can be programmed as
Modbus RTU Masters, Slaves, or Snoopers. They are capable
of scanning up to 16 process variables (PVs) from your exisiting
multivariable transmitters, which make them ideal for multiple tank
level monitoring and control. You can display multiple variables
including level, interface level, density, temperature, and more.
Plus, they combine two independently programmed analog inputs
with powerful math functions. Various math functions that may be
applied to the inputs and PVs include addition, difference, average,
multiplication, division, ratio, and more.
KEY FEATURES
Modbus RTU Serial Communications
The Helios PD2-6080/81 can be programmed to be used as a
Modbus RTU Master, Slave, or Snooper.
As a Master, the Helios PD2-6080/81 reads up to 16 slave devices,
scales the data from each, and displays each on an alternating
display.
In Snooper Mode, the PD2-6080/81 is able to to read any of the
variables being polled by the master by listening to the bus traffic.
It picks up specific register or registers being polled by a master
device from a specific slave device and processes the data
being read. No other device on the Modbus network needs to be
reprogrammed for the Snooper Mode PD2-6080/81 to display data
polled by the Modbus master.
As a Slave, the PD2-6080/81 is controlled by a master device.
The data sent to it by the master is scaled, displayed, and used to
operate the internal relays and 4-20 mA output.
Dual-Line
6-Character
Display
Extra-Large
1.8" Digits
User Congurable
Display (Showing
Custom Tag)
User Congurable
Display Showing
Feet & Inches to
nearest 8th or 16th
of an inch
Alarm Status
Indicators
Connections and
Function Keys Easily
Accessible Behind
Front Panel Door.
▲ PD2-6081 Feet & Inches Display Shown
Superluminous Sunlight Readable Display
The Helios’ standard SunBright display features extraordinarily
bright LEDs. It is perfect for applications where the meter is in
direct sunlight or in applications where visibility may be impaired
by smoke, fog, dust, or distance.
Precise, Accurate, and More Informative
The Helios’ large 1.8" display provides a highly accurate and precise
dual line, 6-digit view of the process measurement. Its 24-bit A/D is
accurate to ±0.03% of calibrated span ±1 count.
Programmable Function Keys
The user can assign the function keys F1, F2, and F3, the digital
input F4, and up to four additional digital inputs to access most of
the menus or to activate functions immediately (e.g. reset max &
min). F4 is a digital input on the signal input connector. Up to four
digital outputs can be assigned to a number of actions and functions
executed by the meter (e.g. Alarms, relay acknowledgement, etc.).
Custom Tag and Units for Each PV
Each process variable has an independently programmable tag
and unit name. The tag must display on the line opposite the PV or
alternate with the PV during scanning. The unit may be configured
to display similarly. The tag and unit may be programmed as any
six-digit alphanumeric value.
Automatic or Manual Scanning
The scanner may automatically or manually cycle through the PVs.
The scanner can be programmed to display each PV for 1 to 99.9
seconds. The NEXT and PREV buttons can be used to manually
scan to the next or previous PV display. The SCAN button will pause
and resume automatic scanning.
UV Resistant
Sunlight Readable Display
NEMA 4X, IP65
Rated Enclosure
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PD2-6080/PD2-6081 Helios Super Snooper Modbus
®
Scanners
Powerful Math Functions
The PD2-6080/81 uses up to 16 process variables in a variety
of powerful math functions designed for process applications.
Programmable Adder (P) and Factor (F) constants allow each
formula to be customized as needed for a specific application.
The Math Channels (C1-C4) may be displayed in many useful
combinations. Most math functions may be applied to all PVs:
for example, it is possible to add up to 16 PVs and calculate the
total volume of all the tanks in a field. The Math2 function allows
for further calculations on the results of other math channels
(e.g. C4= C2/C1).
Name Function Setting
Addition C1=(PV1+PV2+P)*F Sunm
Difference C1=(PV1-PV2+P)*F diF
Absolute Difference C1=((Abs(PV1- PV2)+P)*F diFAbS
Average C1=(((PV1+PV2)/2)+P)*F AvG
Multiplication C1=((PV1*PV2)+P)*F nmulti
Division C1=((PV1/PV2)+P)*F divide
Maximum PV Maximum value of all selected PVs Hi-Pv
Minimum PV Minimum value of all selected PVs Lo-Pv
Draw C1=((PV1/PV2)-1)*F drAuw
Weighted Average C1=((PV2-PV1)*F)+PV1 uw avg
Ratio C1=(PV1/PV2)*F ratio
Concentration C1=(PV1/(PV1+PV2))*F Concen
Resultant Math Channel Math on all other math channels nmath2
Addition C3=(C1+C2+P)*F Sunm
Difference C4=(C1-C2+P)*F diF
Absolute Difference C3=((Abs(C1- C2)+P)*F diFAbS
Average C4=(((C1+C2)/2)+P)*F AvG
Multiplication C3=((C1*C2)+P)*F nmulti
Division C4=((C1/C2)+P)*F divide
Note: The F constant can be any value from 0.00001 to 999999. If the value is
less than 1, it will have the same effect as a divider. For example, the average
could also be derived by using (A+B)*F, where F = 0.500.
Modbus Application Capabilities
The PD6080 & PD6081 scanners can communicate with any
Modbus device using the ever-popular Modbus communications
protocol. Take advantage of the Modbus capabilies in the level and
flow transmitters you already have by using Master Mode to read
more data, more accurately. Possible applications include:
• Use Master Mode to scan the top level, interface level, and
temperature from Modbus multivariable level transmitters.
• Use Master Mode to display the flow rate, tag, and units, for
multiple Modbus-enabled flow meters.
• Use Snooper Mode to add a tank side indicator at eye-level for a
Modbus level transmitter being polled by a master in the control
room.
• Use Snooper Mode to add additional remote displays to a
network with a Modbus scanner acting as the master, and
display the data at all operator locations.
• Use Slave Mode to display data sent to the scanner by a
Modbus master in the control room.
These are just a few capabilities of using the PD6080 & PD6081
Modbus Scanners in a Modbus process network.
Typical Modbus Application Example
Customizable Displays
The Helios has two red LED displays, one Upper display and
one Lower display both at 1.8"high. Each display is a full 6 digits
(-99999 to 999999). The display assignment is programmable,
allowing for various one line or two line PV configurations.
Alternating Tag and Units on the Bottom Display for Each PV
Displaying Two PVs
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PD2-6080/PD2-6081 Helios Super Snooper Modbus
®
Scanners
The PD2-6080/81 includes a digital input as a standard feature. This
digital input can operate with the interlock relays feature, force relays
on from a signal from a PLC or relay on other equipment, acknowledge
alarms, and much more. This is ideal for installations where the meter
is inaccessible behind a cover, or where an additional function key is
needed for customized operation.
P- F4P+ COM V+
3 41 2 5
mA+ COM V+ mA+
7 86 9
Three Tier Password Protection
The Helios PD2-6080/81 offers 3 levels of password protection:
• Level 1 protection allows the operator use of only the 3 pre-
configured function keys without a password.
• Level 2 protection allows the operator use of only the function
keys and the ability to change set points without a password.
• Level 3 protection restricts the operator from using the function
keys and all meter configuration menus without a password.
Advanced Linearization Capability
The Helios PD2-6080/81 includes a 32-point linearizer for PV1
& PV2 (all other PVs utilize two-point linearization). In non-linear
level applications (i.e. some pumping or lift stations), it can easily
compensate for submerged equipment or plumbing that displace
usable volume. In addition to the 32-point linearization, the Helios
can perform a square root or programmable exponent function on
one or both analog inputs, Modbus inputs, any or all enabled PVs, or
automatically calculate level in round horizontal tanks by inputting the
length and height of the tank. Each input’s linearization is performed
independently prior to the input value being used in any math function.
On-Board Digital Input
ACK
INPUT SIGNAL
+ -
2-Wire
4-20 mA
Transmitter (A)
INPUT SIGNAL
P- F4P+ COM V+
3 41 2 5
mA+ COM V+ mA+
7 86 9
2-Wire
4-20 mA
Transmitter (B)
+ - + -
3-Wire
4-20 mA
Transmitter (A)
P- F4P+ COM V+
3 41 2 5
mA+ COM V+ mA+
7 86 9
3-Wire
4-20 mA
Transmitter (B)
+ -
Signal A Signal B
Ch-A Ch-B Ch-A Ch-B
Dual Analog Input Scanning
The PD2-6080/81 has two process input channels (A & B)
capable of accepting current (0-20, 4-20 mA) and voltage (±10,
0-5, 1-5, 0-10 VDC). Each input is programmed separately, with
independent input type selection and scaling. These inputs may be
displayed individually as part of the customizable dual-line display,
or used with a wide range of math functions. Each input has a
custom unit or tag that may be displayed. A 24 V transmitter power
supply is standard and may be used to power the inputs.
Each analog input enabled counts toward the available 16 PVs
that may be scanned. The scanner could be configured to scan a
maximum of 14 Modbus PVs, 4 math channels, and both analog
inputs.
DIGITAL COMMUNICATIONS
Free USB Programming Software (ScanView)
The Helios comes with free programming software that connects
to your PC with a standard USB cable that is provided with each
instrument. A new and very useful feature of this software is that it is
resident on the Helios meter and installed directly into your PC. This
eliminates the need to install drivers or download software from the
internet. Just connect the Helios to your PC (the Helios even gets
its power from the PC so you don’t have to provide external power!)
and within minutes you will be programming it with the free software.
Wall Mounting
The meter can be mounted to any wall using the four provided
mounting holes. Note that the bottom mounting holes are located
behind the front door panel. See PD2-6080/81 manual for
instructions.
ScanView Software
For Helios Modbus Scanners
FEATURES
● Use in Modbus master, slave, or snooper mode
● Scan up to 16 Modbus process variables
● Monitor critical process information
● Manage relays and analog outputs
● Independent scaling, tag, and unit for each PV
● Data log all PVs to a PC
MOUNTING OPTIONS
Pipe Mounting Kit
The meter can also be mounted to a pipe using the optional pipe
mounting kit (PDA6260). This kit includes two mounting plates,
two U-bolts, and the necessary nuts and bolts. See PD2-6080/81
manual for instructions.
Mounting Plate
Mounting Plate
Pipe
U-Bolt
U-Bolt
Back of Meter
Vertical Pipe Mounting
Horizontal Pipe Mounting
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PD2-6080/PD2-6081 Helios Super Snooper Modbus
®
Scanners
Interlock Relay(s)
This function allows a process to use one or more very low voltage
input signals or simple switch contacts to control the state of one
or more internal “interlock” relays. A violation (i.e. loss of input,
open switch, or open circuit) forces one or more N/O interlock
relay contacts to open. One input can be used in series with a
number of interlock switches, or up to four inputs can be required to
force-on one (or more) internal interlock relays. Please see Safety
Interlock on the ProVu Series whitepaper on our website for more
information. Requires use of on-board digital I/O.
SIGNAL INPUT CONDITIONING
Non-linear input signals (i.e. weirs & flumes, differential pressure,
etc.) can be linearized with the Helios’s simple to use built-in signal
input conditioning, such as: square-root extractor, exponential
linearizer, round horizontal tank linearizer, or the Helios’ powerful
general purpose 32-point linearizer (32 point for PV1 & PV2 only -
all other PVs use two linearization points).
Weir Flow Calculated Using
Exponential Signal Input Conditioning
Round Horizontal Tank Signal Input Conditioning
OUTPUTS
Each output of the PD2-6080/81 may be assigned to any single
analog input, Modbus PV, or math PV. The output will reflect the
state of that assigned variable at all times during scanning.
Relay Outputs
The Helios has up to four 3 A Form C relays (SPDT) with multiple power
loss fail-safe options. Relays can be configured for proper protective
action upon input loop break. Relay ON and OFF delay times are user
adjustable. Up to four front panel indicators show alarm and/or relay
state. All relays can be configured for 0-100% deadband.
Relay Operation/Configuration
There are powerful relay functions that can be configured in the
Helios PD2-6080/81, including:
• Automatic reset only (non-latching)
• Automatic + manual reset at any time (non-latching)
• Latching (manual reset only)
• Latching with clear (manual reset only after alarm
condition has cleared)
• Pump alternation control (automatic reset only)
• Sampling (activated for a user-specified time)
• User selectable fail-safe operation
• Relay action for loss (break) of 4-20 mA input signal
• Time delay (on and off), independent for each relay
• Manual control mode
• Interlock relay mode
Analog Output
The isolated analog retransmission signal scales for any 4 mA and
20 mA display value. While the output is nominally 4-20 mA, the
signal will accurately accommodate under- and over-ranges from
1 to 23 mA.
Manual Output Control
Take control of any output with this feature.
All relays can be forced ON or OFF, and
the 4-20 mA output signal can be set
to any value within its range. When the
relays and 4-20 mA output are controlled
manually, an LED labeled “M” is turned
on and the associated Alarm LEDs (1-4)
flash every 10 seconds indicating that the
meter is in manual control mode.
Isolated Transmitter Power Supply
A powerful 24 V @ 200 mA power supply is a standard feature
on the Helios PD2-6080/81. It can be configured for 5, 10, or 24 V
(default) by means of a simple internal jumper (see manual). An
additional power supply (24 V @ 40 mA) is standard with the 4-20
mA output option.
Sampling Function (PV Triggered Timed Relay)
The sampling function allows the operator to set a set point for a
“sampling” relay. When the PV reaches that set point, it will close that
relay’s contacts for a preset period of time (0.1 to 5999.9 seconds). An
example of its use may be for beer/ale fermentation. When the batch
reaches a certain pH, the relay contacts would close and alert someone
or automatically take a sample of the batch. This function can be used
whenever a timed relay output closure is required when the PV reaches
a certain set point.
Hi
Alarm
1M
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PD2-6080/PD2-6081 Helios Super Snooper Modbus
®
Scanners
SPECIFICATIONS
Except where noted all specifications apply to operation at +25°C.
General
Input/Output: Modbus RTU over RS-485, Two analog inputs (4-20 mA, ±10 V)
Display: Two lines with 1.8" (46 mm) high digits, red LEDs; 6 digits per
line (-99999 to 999999), with lead zero blanking
Display Intensity: Eight user selectable intensity levels
Display Update Rate: 5/second (200 ms) seconds. Slave: Dependent on
master device (e.g. PLC)
Overrange: Display flashes 999999
Underrange: Display flashes -99999
Programming Methods: Four programming buttons, digital inputs, PC
and MeterView Pro software, or Modbus registers.
Max/Min Display: Max/min readings reached by the process are stored
until reset by the user or until power to the meter is turned off.
Password: Three programmable passwords restrict modification of
programmed settings.
Pass 1: Allows use of function keys and digital inputs
Pass 2: Allows use of function keys, digital inputs and editing set/reset
points
Pass 3: Restricts all programming, function keys, and digital inputs.
Power Options: 85-265 VAC 50/60 Hz, 90-265 VDC, 20 W max or 12-24
VDC ± 10%, 15 W max. Powered over USB for configuration only.
Isolated Transmitter Power Supply: Terminals P+ & P-: 24 VDC ±
10%. 12-24 VDC powered models selectable for 24, 10, or 5 VDC supply
(internal P+/P- switch).
85-265 VAC models rated @ 200 mA max, 12-24 VDC powered models
rated @ 100 mA max, @ 50 mA max for 5 or 10 VDC supply.
Non-Volatile Memory: All programmed settings are stored in non-
volatile memory for a minimum of ten years if power is lost.
Fuse: Required external fuse: UL Recognized, 5 A max, slow blow; up to 6
meters may share one 5 A fuse.
Isolation: 4 kV input/output-to-power line; 500 V input-to-output or
output-to-P+ supply
Overvoltage Category: Installation Overvoltage Category II: Local level
with smaller transient overvoltages than Installation Overvoltage Category III.
Environmental: Operating temperature range: -40 to 65°C
Storage temperature range: -40 to 85°C
Relative humidity: 0 to 90% non-condensing
Connections: Removable and integrated screw terminal blocks accept 12 to 22
AWG wire.
Enclosure: UL Type 4X, IP65 rated. Polycarbonate & glass blended
plastic case, color: gray. Includes four PG11 through-hole conduit
openings, with two factory installed PG11, IP68, black nylon threaded hole
plugs with backing nuts.
Wall Mounting: Four (4) mounting holes provided for screwing meter into
wall. See PD2-6080/81 manual for instructions.
Pipe Mounting: Optional pipe mounting kit (PDA6260) allows for pipe
mounting. Sold separately. See PD2-6080/81 manual for instructions.
Tightening Torque: Removable Screw Terminals: 5 lb-in (0.56 Nm)
Digital I/O and RS485 Terminals: 2.2 lb-in (0.25 Nm)
Overall Dimensions: 10.63" x 12.59" x 4.77"
(270 mm x 319.7 mm x 121.2 mm) (W x H x D)
Weight: 6.10 lbs (2.76 kg)
UL File Number: UL & C-UL Listed. E160849; 508 Industrial Control
Equipment.
Warranty: 3 years parts & labor
USB Connection: Compatibility: USB 2.0 Standard, Compliant
Connector Type: Micro-B receptacle
Cable: USB A Male to Micro-B Cable
Driver: Windows 98/SE, ME, 2000, Server 2003/2008, XP 32/64-Bit,
Vista 32/64-Bit, Windows 7 32/64-Bit, Windows 10 32/64-Bit
Power: USB Port
Operating Modes
Master: Processes data read from Modbus RTU slave devices. It polls
up to 16 process variables from 1 to 16 slave devices. The Master is
capable of scanning the selected PVs, scaling the data, triggering relays,
performing math operations, and driving the analog outputs.
Snooper: Listens to the Modbus traffic and picks up a specific register or
registers being polled by a master device from a specific slave device and
processes the data being read. The Snooper mode handles the data the
same way as the Master.
Slave: Processes data sent to it from a Modbus RTU master device.
Note: The relays and the 4-20 mA outputs are functional in all modes.
Master & Snooper Settings
PV Number: PV1–PV16 Enable or disable the process variables to be
polled by the Master.
Slave Id: Assign the slave ID or address (1-247, 256-259 for mA or volts
inputs) containing the process variables to be displayed by the selected PV.
Function Code: Select which Modbus function code (03, 04, or 65) to
use in reading the slave device.
Register Number: 5 digit: 30001-39999, 40001-49999, or 1-65, 536;
6 digit: 300001-365536 or 400001-465536 (Function Code 65 N/A here)
Specifies which register(s) to read in the slave device. Range is
dependent on Function Code selection (65, 04, or 03) and digits selection
(5 or 6).
Data Type: Select the data format that the slave device uses. Select
between Short integer (2 byte), Long integer (4 byte), or floating point
(4 byte), Signed or Unsigned (integer only) and byte order: 1234, 4321,
2143, or 3412 (big-endian vs. little-endian, or swapped).
Poll Time: 1.0 to 99.9 sec. Time between read-commands (Master
mode).
Slave Response Timeout: 0.0 to 99.9 seconds: Time allowed for the
slave to respond before the scanner generates a communication break
condition. The master polls the slave 3 times before starting the response
timeout timer.
Slave/Snooper mode: Time the scanner will wait for new data before
going into break condition.
Slave mode: Programming 0 disables the timeout; the last value
received will be displayed indefinitely.
Communication Break: Displays “b rEAH ” after the Master has polled the
slave device 3 times and the response timeout has elapsed. The Snooper
and Slave modes go into break condition after no new data is received
within the response timeout window. Relays can be programmed to go
on, off, or ignore the break condition. The analog outputs can be setup to
generate a fixed mA current when a break condition is detected.
PV Settings
Tag & Units: 6-character, independent tag and units for each PV and
math channel
PV Format: PD6080 default: Decimal format; PD6081 default: FT & IN,
1/8th or 1/16th; decimal format may be selected for display line 2
indication.
Display Decimal Point:
Up to five decimal places or none: d.ddddd, dd.dddd, ddd.ddd, dddd.dd,
ddddd.d, or dddddd
Float Decimal Point:
Select the number of decimals to use for the floating point data expected
from the slave or master device (this is independent from the display
decimal point selection).
PV & Math Scaling: All PVs and math channels may be scaled to
represent the input data in any engineering unit. Example: Level
transmitter = 999.999 inches; to display in Ft-In-1/16th scale input 2 to
display 83 Ft – 4 In – 0/16th.
Display Settings
Scan Mode: Automatic: 1.0 to 99.9 sec, Manual: Front panel or digital
inputs, Go on alarm: Continues scanning after an alarm is detected,
Stop on alarm: Goes to the alarmed PV and stops scanning; press Scan
to resume scanning.
Display Scan Rate: Master/Snooper: 1 PV/second to 1 PV every 99.9
seconds, Slave: Dependent on master device (e.g. PLC)
Note: The display scan rate is independent of the poll time.
Display Assignment: Display line 1 may be assigned to PV (process
values), Ch C (math channel), PV & units, tag & PV, tag-PV-units, C &
units, tag-C-unit, Set point 1 8, max/min PV, max/min C.
Display line 2 may be assigned to all of the above, tag, tag & units, or off.
The tag and units are displayed alternately for 2 sec max, when selected.
Different tags & PVs may be selected to display on line 1 and line 2 at the
same time.
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PD2-6080/PD2-6081 Helios Super Snooper Modbus
®
Scanners
Math Functions
Name Math Operation (Examples)
(P = Adder, F = Factor) Setting
Addition (PV1+PV2+P)*F Sunm
Difference (PV1-PV2+P)*F diF
Absolute Difference ((Abs(PV1- PV2)+P)*F diFAbS
Average (((PV1+PV2)/2)+P)*F AvG
Multiplication ((PV1*PV2)+P)*F nmulti
Division ((PV1/PV2)+P)*F divide
Maximum PV Maximum value of all selected PVs Hi-Pv
Minimum PV Minimum value of all selected PVs Lo-Pv
Draw ((PV1/PV2)-1)*F drAuw
Weighted Average ((PV2-PV1)*F)+PV1 uw avg
Ratio (PV1/PV2)*F ratio
Concentration (PV1/(PV1+PV2))*F Concen
Math 2 Math on all other math channels nmath2
Relays
Rating: 4 SPDT (Form C) internal rated 3 A @ 30 VDC and 125/250 VAC
resistive load; 1/14 HP (≈ 50 W) @ 125/250 VAC for inductive loads
Noise Suppression: Noise suppression is recommended for each relay
contact switching inductive loads. See PD2-6080/81 manual for details.
Electrical Noise Suppression: A suppressor (snubber) should be
connected to each relay contact switching inductive loads to prevent
disruption to the microprocessor’s operation. Recommended suppressor
value: 0.01 µF/470 Ω, 250 VAC (PDX6901).
Deadband: 0-100% of span, user programmable
High or Low Alarm: User may program any alarm for high or low trip
point. Unused alarm LEDs and relays may be disabled (turned off).
Relay Operation: Automatic (non-latching) and/or manual reset
Latching (requires manual acknowledge) with/without clear
Pump alternation control (2 to 4 relays)
Sampling (based on time)
Off (disable unused relays and enable Interlock feature)
Manual on/off control mode
Relay Reset: User selectable buttons, digital inputs, or PC.
1. Automatic reset only (non-latching), when input passes the reset point.
2. Automatic + manual reset at any time (non-latching).
3. Manual reset only, at any time (latching).
4. Manual reset only after alarm condition has cleared (latching).
Note: Button behind front panel or digital input may be assigned to
acknowledge relays programmed for manual reset.
Time Delay: 0 to 999.9 seconds, on & off relay time delays;
Programmable and independent for each relay.
Fail-Safe Operation: Programmable and independent for each relay.
Note: Relay coil is energized in non-alarm condition. In case of power
failure, relay will go to alarm state.
Auto Initialization: When power is applied to the meter, relays will reect
the state of the input to the meter.
Digital Input & Output Terminal
Channels: 4 digital inputs & 4 digital outputs
Digital Input Logic High: 3 to 5 VDC
Digital Input Logic Low: 0 to 1.25 VDC
Digital Output Logic High: 3.1 to 3.3 VDC
Digital Output Logic Low: 0 to 0.4 VDC
Source Current: 10 mA maximum output current
Sink Current: 1.5 mA minimum input current
+5 V Terminal: To be used as pull-up for digital inputs only. Connect
normally open pushbuttons across +5 V & DI 1-4.
WARNING! DO NOT use +5 V terminal to power external devices.
Isolated 4-20 mA Transmitter Output
Output Source: Process Variable 1-16, math channels C1-C4, set points
1-4, or manual control mode
Scaling Range: 1.000 to 23.000 mA for any display range
Calibration: Factory calibrated: 4.000 to 20.000 = 4-20 mA output
Analog Output Programming: 23.000 mA maximum for all parameters:
Overrange, underrange, max, min, and break
Communications Break: Programmable mA output when a slave device
does not reply within the response timeout
Accuracy: ± 0.1% of span ± 0.004 mA
Temperature Drift: 0.4 μA/°C max from 0 to 65°C ambient,
0.8 μA/°C max from -40 to 0°C ambient
Isolated Transmitter Power Supply: Terminals I+ & R: 24 VDC ± 10%.
Isolated from the input at >500 V. May be used to power the 4-20 mA
output or other devices. All models rated @ 40 mA max.
External Loop Power Supply: 35 VDC maximum
Output Loop Resistance:
Power Supply Minimum Maximum
24 VDC 10 Ω 700 Ω
35 VDC (external) 100 Ω 1200 Ω
Dual Process Input
Two Inputs: Two analog inputs, each separately eld selectable:
0-20 mA, 4-20 mA; ±10 V (0-5, 1-5, 0-10 V)
PV Analog Channel ID: Ch-A mA: Assign PV to ID 256 or Ch-A volt:
257; Ch-B mA: Assign PV to ID 258 or Ch-B volt: 259
Accuracy: ±0.03% of calibrated span ±1 count, square root &
programmable exponent accuracy range: 10-100% of calibrated span
Temperature Drift: 0.005% of calibrated span/±C max from 0 to 65°C
ambient, 0.01% of calibrated span/°C max from -40 to 0°C ambient
Signal Input Conditioning: Linear, square root, programmable
exponent, or round horizontal tank volume calculation
Multi-Point Linearization: 2 to 32 points for PV1 and PV2
Programmable Exponent: 1.0001 to 2.9999
Low-Flow Cutoff: 0-999999 (0 disables cutoff function) for PV1 and PV2
Calibration Range:
Input Range Minimum Span Input 1 & Input 2
10 Ω700 Ω
100 Ω 1200 Ω
An error message will appear if the input 1 & input 2 signals are too close together.
Input Impedence: Voltage ranges: greater than 500 kΩ
Current ranges: 50 - 100 Ω (depending on resettable fuse impedance)
Input Overload: Current input protected by resettable fuse, 30 VDC
max. Fuse resets automatically after fault is removed.
Serial Communications
Compatibility: EIA-485
Connectors: Removable screw terminal connector
Max Distance: 3,937'(1,200 m) max
Status Indication: Separate LEDs for Power (P), Transmit (TX), and
Receive (RX)
Scanner Id: 1 – 247 (Scanner Modbus address)
Baud Rate: 300 – 19,200 bps
Transmit Time Delay: Programmable 0 to 4999 ms
This is the time the scanner will wait for a slave to respond before
sending another request on the bus. This value should be greater than
100 ms to avoid collisions on the bus.
Data: 8 bits (1 start bit, 1 or 2 stop bits)
Parity: Even, Odd, or None with 1 or 2 stop bits
Byte-To-Byte Timeout: 0.01 – 2.54 second
Turn Around Delay: Less than 2 ms (fixed)
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LDS2-6080_C 08/18
Precision Digital corPoration
PD2-6080/PD2-6081 Helios Super Snooper Modbus
®
Scanners
+-
21
1
2
3
4
5
6
7
8
P+/P-
24V 10V 5V
M-LINK
USB
MENU RIGHT UP ACK
POWER
Ch-A
P- F4P+ COM V+
3 41 2 5
mA+ COM V+ mA+
7 86 9
Ch-B
SIGNAL
MENU PREV
F1
NEXT
F2
SCAN
F3
R I-I+ NO
NC
CNO
NC
C NONCC NO NCC
MA OUT
21 34
36521
RELAY4RELAY3
4
36521
RELAY2RELAY1
RS-485
DIGITAL I/O
PWR TX RX
DI DI DO DO
O1 O2 O3 O4 G
I1I2I3I4+5
__ __
DIMENSIONS
Mounting Hole Mounting Hole
Connection
Cover Screw
10.63" (270 mm)
12.59" (319.7 mm)
26000
GAL
Front View
Disclaimer
The information contained in this document is subject to change without notice. Precision Digital
Corporation makes no representations or warranties with respect to the contents hereof, and
specically disclaims any implied warranties of merchantability or tness for a particular purpose.
©2016-2018 Precision Digital Corporation. All rights reserved.
Helios PD2-6081 Feet & Inches Modbus Scanner Models
85-265 VAC
Model
12-24 VDC
Model Options Installed
PD2-6081-6H0 PD2-6081-7H0 No Options
PD2-6081-6H7 PD2-6081-7H7 4 Relays & 4-20 mA Output
Note: 24 V Transmitter power supply standard on all models.
Accessories
Model Description
PDA6260 Pipe Mounting Kit
PDA7485-I RS-232 to RS-422/485 Isolated Converter
PDA7485-N RS-232 to RS-422/485 Non-Isolated Converter
PDA8485-I USB to RS-422/485 Isolated Converter
PDA8485-N USB to RS-422/485 Non-Isolated Converter
PDAPLUG2 Plastic Conduit Plug
PDX6901 Suppressor (snubber): 0.01 μF/470 Ω, 250 VAC
ORDERING INFORMATION
Helios PD2-6080 Decimal Modbus Scanner Models
85-265 VAC
Model
12-24 VDC
Model Options Installed
PD2-6080-6H0 PD2-6080-7H0 No Options
PD2-6080-6H7 PD2-6080-7H7 4 Relays & 4-20 mA Output
Note: 24 V Transmitter power supply standard on all models.
CONNECTIONS
Connector Labeling for Fully Loaded PD2-6080
2.63" (67 mm)
4.77"
(121.2 mm)
Side View
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