PRECISION DIGITAL Javelin D PD644 User manual

PRECISION DIGITAL CORPORATION
233 South Street • Hopkinton MA01748 USA
Tel [phone] • Fax [phone]
www.predig.com
Javelin D • Model PD644
Instruction Manual
•Measures DC Voltage up to 300 VDC
•4 Digit Display, 0.56" (14 mm) High, Red LEDs
•Maximum/Minimum Display
•NEMA 4X, IP65 Front
•4-20 mA Transmitter
•Universal Power Supply 85-265 VAC
•12-36 VDC/12-24 VAC Power Option
•Two Relays Option
•RS-485 Serial Communication
•Modbus®RTU Option
•Copy Meter Settings to Other Meters

Javelin D • Model PD644 Voltmeter Instruction Manual
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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 specifically disclaims any implied warranties of
merchantability or fitness for a particular purpose.
Registered Trademarks
Modbus®is a registered trademark of Schneider Automation Inc.
All other trademarks mentioned in this document are the property
of their respective owners.
©2005-2015 Precision Digital Corporation. All rights reserved.
Visit our Web Site
www.predig.com

Javelin D ●Model PD644 Voltmeter Instruction Manual
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INTRODUCTION
The Javelin D is an easy to use digital voltmeter with built-in 4-20 mA
isolated transmitter and RS-485 serial communication capability. The
four front panel buttons provide quick and simple setup and programming.
The optional Form C relays can be used for alarm indication or process
control applications.
The Modbus®RTU serial communication upgrade enables the Javelin D
Digital Voltmeter to operate as a Modbus®slave in RS-485 multi-point
data acquisition systems.
ORDERING INFORMATION
85-265 VAC
Model 12-36 VDC Model Options Installed
PD644-6R3-14 24 VDC Transmitter Supply
PD644-6R5-14 2 Relays, 24 VDC Supply
PD644-7R3-04 None
PD644-7R5-04 2 Relays
All models may be powered from AC or DC. See Specifications for details.
Accessories
Model Description
PDN-MODBUS Modbus®RTU upgrade
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
PDX6901 Suppressor (snubber): 0.01 µF/470 , 250 VAC
Plastic, steel, and stainless steel NEMA 4 and cast aluminum explosion-
proof enclosures are available to house up to ten meters.
Visit our web site for details on all accessories.

Javelin D ●Model PD644 Voltmeter Instruction Manual
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Table of Contents
INTRODUCTION------------------------------------------------------------ 3
ORDERING INFORMATION--------------------------------------------- 3
SAFETY INFORMATION ------------------------------------------------- 6
SPECIFICATIONS---------------------------------------------------------- 7
General-------------------------------------------------------------------------------7
Voltage Measurement Input---------------------------------------------------8
Safety Compliance---------------------------------------------------------------8
Relays Option----------------------------------------------------------------------9
Isolated 4-20 mA Transmitter Output------------------------------------ 10
Serial Communications------------------------------------------------------- 10
INSTALLATION------------------------------------------------------------11
Unpacking------------------------------------------------------------------------- 11
Panel Mounting------------------------------------------------------------------ 11
Connections---------------------------------------------------------------------- 12
Connector Labeling ---------------------------------------------------------- 12
Power Connections ---------------------------------------------------------- 12
DC Voltage Measurement Connections -------------------------------- 13
Serial Communication------------------------------------------------------- 14
Relay Output Connections ------------------------------------------------- 14
Switching Inductive Loads-------------------------------------------------- 15
4-20 mA Output Signal Connections ------------------------------------ 16
SETUP AND PROGRAMMING ----------------------------------------17
Front Panel Buttons and Status LED Indicators--------------------- 18
Display Functions and Messages----------------------------------------- 19
Main Menu ------------------------------------------------------------------------ 21
Setting Numeric Values ------------------------------------------------------ 22
Setting Up the Meter (setu) ------------------------------------------------- 22
Setting the Relay Operation (rely)-------------------------------------- 23
Relay and Alarm Operation ------------------------------------------------ 26
Scaling the 4-20 mA Analog Output (Aout)---------------------------- 32
Analog Output when Display is Out of Range------------------------- 32
Programming the Meter (prog)--------------------------------------------- 33
Scaling the Meter (scal)---------------------------------------------------- 34
Calibrating the Meter (Cal)------------------------------------------------- 34
Recalibrating Process Inputs (ICal)------------------------------------- 35

Javelin D ●Model PD644 Voltmeter Instruction Manual
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Setting Up the Password (pass) ------------------------------------------- 35
Locking the Meter ------------------------------------------------------------ 35
Unlocking the Meter---------------------------------------------------------- 36
Advanced Features Menu---------------------------------------------------- 37
Advanced Features Menu & Display Messages---------------------- 38
Noise Filter (fltr)------------------------------------------------------------ 39
Noise Filter Bypass (byps)------------------------------------------------- 39
Serial Communications (serl)-------------------------------------------- 40
Select Menu (SElc) ---------------------------------------------------------- 40
Display Intensity (inty)----------------------------------------------------- 41
Meter Copy Function (Copy)----------------------------------------------- 42
Internal Calibration (ICal)-------------------------------------------------- 44
OPERATION----------------------------------------------------------------46
Front Panel Buttons Operation -------------------------------------------- 46
Maximum and Minimum Readings---------------------------------------- 47
MOUNTING DIMENSIONS----------------------------------------------48
TROUBLESHOOTING----------------------------------------------------49
Diagnostics Menu (diag)----------------------------------------------------- 49
Determining Software Version -------------------------------------------- 49
Factory Defaults & User Settings----------------------------------------- 50
Reset Meter to Factory Defaults------------------------------------------- 52
Troubleshooting Tips --------------------------------------------------------- 53
USER INTERFACE QUICK REFERENCE GUIDE----------------54

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Table of Figures
Figure 1. Panel Cutout and Mounting...............................................11
Figure 2. Power Connections............................................................12
Figure 3. DC Voltage Signal Connections........................................13
Figure 4. RS-485 Data Bus Connections..........................................14
Figure 5. Relay Output Connections ................................................14
Figure 6. AC and DC Loads Protection.............................................15
Figure 7. Low Voltage DC Loads Protection....................................15
Figure 8. 4-20 mA Transmitter Powered by Meter ...........................16
Figure 9. 4-20 mA Transmitter Powered Externally.........................16
Figure 10. Meter Copy Connection ...................................................42
Figure 11. Meter Dimensions – Side View........................................48
Figure 12. Case Dimensions - Top View...........................................48
SAFETY INFORMATION
!
CAUTION: Read complete
instructions prior to instal-
lation and operation of the
meter.
WARNING: Risk of
electric shock.
WARNING
Hazardous voltages exist within enclosure. Installation and service
should be performed only by trained service personnel.

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SPECIFICATIONS
Except where noted all specifications apply to operation at 77°F (25°C).
General
DISPLAY 0.56" (14 mm) high, red LED
Four digits (-1999 to 9999), automatic lead zero blanking.
DISPLAY INTENSITY Eight intensity levels
DISPLAY
UPDATE RATE Minimum of five times per second
OVERRANGE Display flashes 9999
UNDERRANGE Display flashes -1999
PROGRAMMING
METHODS Four front panel buttons, RS-485 interface, or cloning using Copy function
NOISE FILTER Programmable from 2 to 199 (0 will disable filter)
RECALIBRATION All ranges are calibrated at the factory. Recalibration is
recommended at least every 12 months.
MAX/MIN
DISPLAY Maximum and minimum measured voltages stored until reset by the user or until power to the meter is turned off.
PASSWORD Programmable password restricts modification of
programmed settings.
NON-VOLATILE
MEMORY All programmed settings are stored in non-volatile memory for a minimum of ten years without power.
Model Watts
PD644-6RX-14* 20
PD644-7RX-04 6
POWER OPTIONS AC: 85-265 VAC, 50/60 Hz
DC: 90-265 VDC
Optional: 12-36 VDC, 12-24 VAC
See table for power consumption
(*X: number depends on option)
FUSE Required fuse: UL Recognized, 5 A maximum, slow blow
Up to 6 meters can share one 5 A fuse
ISOLATED
POWER SUPPLY
OPTION
24 VDC ±10% @ 200 mA
NORMAL MODE
REJECTION 64 dB at 50/60 Hz
ISOLATION 4 kV from mains
500 V from transmitter to other secondary circuits
500 V from 24 VDC supply to other secondary circuits

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ENVIRONMENTAL
Operating temperature range: 32 to 150°F (0 to 65°C) Storage temperature range: -40 to 185°F (-40 to 85°C)
Relative humidity: 0 to 90%, non-condensing
CONNECTIONS
Removable screw terminal blocks accept 12 to 26 AWG
wi
r
e
ENCLOSURE 1/8 DIN, high impact plastic,
UL 94V-0, color: gray
MOUNTING 1/8 DIN panel cutout required. Two panel mounting
bracket assemblies provided.
TIGHTENING
TORQUE Screw terminal connectors: 5 lb-in (0.56 Nm)
OVERALL
DIMENSIONS 2.45" x 4.68" x 4.19" (62 mm x 119 mm x 106 mm) (H x W x D)
WEIGHT 9 oz (255 g) (Including options)
WARRANTY 3 years parts and labor
EXTENDED
WARRANTY 1 or 2 years, refer to Price List for details
Voltage Measurement Input
INPUT 0 to 300 VDC
ACCURACY ±0.05% of full scale ±1 count
TEMPERATURE
DRIFT 50 PPM/°C from 0 to 65°C ambient
DECIMAL POINT Up to three decimal places: d.ddd, dd.dd, ddd.d, or dddd
INPUT
IMPEDANCE Greater than 1 MΩ
CALIBRATION
RANGE
A
n Error message will appear if input 1 and input 2
signals are too close together.
Minimum Span: 10 VDC
Safety Compliance
UL LISTED USA and Canada
UL 508 Industrial Control Equipment
UL FILE NUMBER E160849
FRONT PANEL UL Type 4X, NEMA 4X, IP65; panel gasket provided

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Relays Option
RATING 2 SPDT (form C); rated 3 A @ 30 VDC or 3 A @ 250 VAC
resistive load; 1/14 HP @ 125/250 VAC for inductive loads
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
(Order PDC model number PDX6901).
DEADBAND 0-100% of full scale, user selectable
HIGH OR LOW
ALARM User may program any alarm for high or low trip point.
RELAY
OPERATION Automatic (non-latching) Latching
Alternation control
Modbus®control
RELAY RESET User selectable via front panel buttons or serial
communication
Automatic reset only (non-latching)
Automatic plus manual reset at any time (non-latching)
Manual reset only at any time (latching)
Manual reset only after alarm condition has cleared (latching)
Automatic reset: Relays will automatically reset when the
input passes the reset point.
Manual reset: Front panel ACK button. Pressing ACK re-
sets all manually resettable relays.
TIME DELAY 0 to 199 seconds, on and off delays
Programmable and independent for each relay
FAIL-SAFE
OPERATION Programmable Independent for each relay
AUTO
INITIALIZATION When power is applied to the meter, relays will reflect the state of the input to the meter.
Fail-safe operation: relay coil is energized in non-alarm condition. In
case of power failure, relay will go to alarm state.

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Isolated 4-20 mA Transmitter Output
OUTPUT RANGE 1.00 to 23.00 mA typical
CALIBRATION Factory calibrated for 4-20 mA
SCALING RANGE 0.00 to 23.99 mA for any display range,
see output range above
ACCURACY ± 0.1% F.S. ± 0.004 mA
TEMPERATURE
DRIFT 50 PPM/°C from 0 to 65°C ambient
Note: Analog output drift is separate from input drift.
ISOLATED
TRANSMITTER
POWER SUPPLY
24 VDC ±10% @ 20 mA
EXTERNAL LOOP
POWER SUPPLY 35 VDC maximum
Power supply Minimum Maximum
24 VDC 10 Ω700 Ω
OUTPUT LOOP
RESISTANCE
35 VDC (external) 100 Ω1200 Ω
Serial Communications
METER
ADDRESS PDC protocol: 0 - 99 Modbus®protocol: 1 - 247
BAUD RATE 300 – 19,200 bps
TRANSMIT
TIME DELAY Programmable between 0 and 199 ms
DATA 8 bit (1 start bit, 1 stop bit)
PARITY None, even, or odd
(Modbus®only; PDC protocol does not use parity)
BYTE-TO-BYTE
TIMEOUT 0.01 – 2.54 sec (Modbus®only)
TURN AROUND
DELAY Less than 2 ms (fixed)
Request or download copies of the Precision Digital Serial Communication Pro-
tocol and Modbus®Register Tables specifications for details about serial data
communications with Precision Digital products.

Javelin D ●Model PD644 Voltmeter Instruction Manual
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INSTALLATION
There is no need to remove the meter from its case to com-
plete the installation, wiring, and setup of the meter.
Unpacking
Remove the meter from box. Inspect the packaging and con-
tents for damage. Report damages, if any, to the carrier.
If any part is missing or the meter malfunctions, please contact
your supplier or the factory for assistance.
Panel Mounting
• Prepare a standard 1/8 DIN panel cutout – 3.622" x 1.772" (92 mm
x 45 mm). Refer to Mounting Dimensions, page 48 for more details.
• Clearance: allow at least 4" (102 mm) behind the panel for wiring.
• Panel thickness: 0.04" - 0.25" (1.0 mm - 6.4 mm).
Recommended minimum panel thickness to maintain Type 4X
rating: 0.06" (1.5 mm) steel panel, 0.16" (4.1 mm) plastic panel.
• Remove the two mounting brackets provided with the meter (back-off
the two screws so that there is ¼" (6.4 mm) or less through the
bracket. Slide the bracket toward the front of the case and remove).
• Insert meter into the panel cutout.
• Install mounting brackets and tighten the screws against the panel.
To achieve a proper seal, tighten the mounting bracket screws
evenly until meter is snug to the panel along its short side. DO NOT
OVER TIGHTEN, as the rear of the panel may be damaged.
Panel
Gasket
Mounting
Bracket Mounting Screw
Removable
Connectors
3.622" (92mm)
1.772"
(45mm) Panel Cutout
to DIN 43700
Square Corners to 0.060"
(1.5mm) Max Radius
A
B
Tolerances:
A: +0.032 (+0.8mm)
-0.000 (-0.0mm)
B: +0.024 (+0.6mm)
-0.000 (-0.0mm)
Figure 1. Panel Cutout and Mounting

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Connections
All connections are made to removable screw terminal connectors
located at the rear of the meter. You must use copper wire with
60°C or 60/75°C insulation.
!
Observe all safety regulations. Electrical wiring
should be performed in accordance with all appli-
cable national, state, and local codes to prevent
damage to the meter and ensure personnel safety.
Connector Labeling
The label on each meter shows the location of all connectors for the
particular model. As an example Figure 2 illustrates the connector lay-
out for meters equipped with relays and 4-20 mA transmitter. Other
models have different connector arrangements.
24V OUT
21
P+ P-
V+ V-
12
SIGNAL mA OUT
D+ D- I - I +G
3412 5
RS-485
COM NO NO NC NC COM
4365 21
RELAY2 RELAY1 POWER
21
+
Figure 2. Connector Labeling
Power Connections
Power connections are made to a two position screw terminal connector
labeled POWER. The meter will operate regardless of DC polarity con-
nection. The +and -symbols are only a suggested wiring convention.
The screw terminal power connector is specially keyed to prevent inser-
tion into the wrong receptacle on the meter. The installer must not re-
move nor alter the positions of any of the keying inserts.
1
2
AC or D
C
POWER
UL Recognized External Fuse
5 A Max, 250 V Slow Blow
P
O
WER
CO
NNE
C
T
OR
+-
Figure 3. Power Connections

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DC Voltage Measurement Connections
Figure 4 shows how to connect the DC voltage to be measured.
The voltage on terminal V- must be at ground potential. Be sure to ob-
serve the correct polarity.
!
The reversal of polarity can result in damage to the
meter and associated data communications
equipment and can expose personnel to electrical
shock hazards.
S
I
G
NAL
CONNECTOR
12
V-V+
-
+
0-300 VDC
Figure 4. DC Voltage Signal Connections

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Serial Communication
The PD644 can be connected directly to an RS-485 data bus of up to
32 nodes. For systems consisting of more than 32 nodes RS-485 re-
peaters are necessary. Serial communication wiring connections to the
PD644 are made via the three position screw terminal connector labeled
RS-485. Please refer to standard EIA-485 for complete specifications
for balanced digital multi-point communications. The use of shielded
twisted pair cable is recommended to protect the data signals from elec-
trical interference. For long wire runs it is good practice to terminate the
bus at both ends with a resistor connected between D+ and D- that
matches the characteristic impedance of the cable. A typical value for
termination resistors is 120 .
R
S
-485
CONNECTOR
132
GD-D+
Data Common
Data
-
Data +
S
hi
e
l
d
Twisted-Pair
R
S
-485
CONNECTOR
132
GD-D+
To other meter
s
or RS-485
devices
Data Common
Data+
-
Data -
Figure 5. RS-485 Data Bus Connections
For non-multiplexed serial communications with RS-232 data communi-
cations equipment such as a personal computer, an RS-232 to RS-485
converter such as the Precision Digital PDA7485 is required. If using a
PDA7485, connect the PD644 according to the PDA7485 wiring dia-
gram for a two wire RS-485 application.
Relay Output Connections
Relay connections are made to a six-terminal connector labeled
RELAY1 RELAY2.
CO
MN
O
N
O
N
C
N
C
CO
M
RELAY
2
RELAY
1
4365 21
Figure 6. Relay Output Connections

Javelin D • Model PD644 Voltmeter Instruction Manual
15
Switching Inductive Loads
The use of suppressors (snubbers) is strongly recommended when switching
inductive loads to prevent disrupting the microprocessor’s operation. The
suppressors also prolong the life of the relay contacts. Suppression can be
obtained with resistor-capacitor (RC) networks assembled by the user or
purchased as complete assemblies. Refer to the following circuits for RC network
assembly and installation:
Figure 1. AC and DC Loads Protection
Choose R and C as follows:
R: 0.5 to 1 for each volt across the contacts
C: 0.5 to 1 µF for each amp through closed contacts
Notes:
1. Inductive relay rating is 1/14 HP (50 W) at 115/230 VAC
2. Use capacitors rated for 250 VAC.
3. RC networks may affect load release time of solenoid loads. Check to
confirm proper operation.
4. Install the RC network at the meter's relay screw terminals. An RC network
may also be installed across the load. Experiment for best results.
Figure 2. Low Voltage DC Loads Protection
RC Networks Available from Precision Digital
RC networks are available from Precision Digital and should be applied to each
relay contact switching an inductive load. Part number: PDX6901.
Note:
Relays are de-rated to 1/14th HP (50 watts) with an inductive load.
C
R
C
R
Use a diode with a reverse
breakdown voltage two to
three times the circuit
voltage and forward current
at least as large as the load
current.

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4-20 mA Output Signal Connections
Connections for the 4-20 mA transmitter are made to the screw terminal
connector labeled mA OUT. The 4-20 mA transmitter may be powered
from an internal power supply (optional) available at the screw terminal
connector labeled 24V OUT or from an external power supply.
I-
mA OUT
21
I+
Remote Display,
Chart Recorder,
etc.
+
-
P+
24V OUT
12
P-
Figure 9. 4-20 mA Transmitter Powered by Meter
External
Power
Supply
-+
I-
mA OUT
21
I+
Remote Display,
Chart Recorder,
etc.
+
-
Figure 10. 4-20 mA Transmitter Powered Externally

Javelin D ●Model PD644 Voltmeter Instruction Manual
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SETUP AND PROGRAMMING
• There is no need to recalibrate the meter
when first received from the factory.
• The meter is factory calibrated prior to ship-
ment. The calibration equipment used at the
factory is certified to NIST standards.
Overview
All setup and programming functions are done with the front panel but-
tons. There are no jumpers involved in the setup process of the meter.
After power and signal connections have been completed and verified,
apply power to the meter.
For
User Interface Quick Reference Guide
go to page 54

Javelin D ●Model PD644 Voltmeter Instruction Manual
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Front Panel Buttons and Status LED Indicators
237.7
1 2 S R
Button
Symbol Description LED Status
Menu 1 Alarm 1
Right arrow/Reset 2 Alarm 2
Up arrow/Max S Set point indicator
Enter/Ack R Reset point indicator
• Press the Menu button to enter or exit the Programming Mode at
any time.
• Press the Right arrow button to move to the next digit during digit
programming.
• Press the Up arrow button to scroll through the menus, decimal
point, or to increment the value of a digit.
• Press the Enter/Ack button to access a menu or to accept a setting.
• Press and hold the Right arrow and the Menu buttons, for three
seconds, to access the Advanced features of the meter (Tip: press
and hold Right arrow first then press Menu).

Javelin D ●Model PD644 Voltmeter Instruction Manual
19
Display Functions and Messages
The meter displays various functions and messages during
setup/programming and operation. The following table shows the dis-
played functions and messages with their action or setting description.
Display Parameter Action/Setting
setu Setup Enter Setup menu
dec.p Decimal point Set decimal point for process inputs
RELY Relay Enter the Relay menu
RLY1 Relay1 Relay 1 setup
Act1 Action1 Set relay 1 action (automatic, latching, etc.)
Auto Automatic Set relay for automatic reset
A-
m Auto-manual Set relay for automatic + manual reset any
time
LtCH Latching Set relay for latching operation
L-CL Latching-cleared Set relay for latching operation with manual
reset only after alarm condition has cleared
Altr Alternate Set relays for alternation control
oFF Off Disable relay and front panel status LEDs
Disable relay’s fail-safe operation
Set1 Set1 Program set point 1
rSt1 Reset1 Program reset point 1
RLY2 Relay2 Setup relay 2
Act2 Action2 Set relay 2 action (automatic, latching, etc.)
Set2 Set2 Program set point 2
RSt2 Reset2 Program reset point 2
FLSF Fail-safe Enter Fail-safe menu
FLS1 Fail-safe1 Set relay 1 fail-safe operation
on On Enable fail-safe operation
FLS2 Fail-safe2 Set relay 2 fail-safe operation
DLAY Delay Enter Time Delay menu
DLY1 Delay1 Enter relay 1 time delay setup

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Display Parameter Action/Setting
On1 On1 Set relay 1 On time delay
OFF1 Off1 Set relay 1 Off time delay
DLY2 Delay2 Enter relay 2 time delay setup
On2 On2 Set relay 2 On time delay
OFF2 Off2 Set relay 2 Off time delay
Aout Analog output Enter the Analog output menu
out1 Output 1 Program output 1 value (e.g. 4 mA)
out2 Output 2 Program output 2 value (e.g. 20 mA)
prog Program Enter the Program menu
Cal Calibrate Enter the Calibrate menu
scal Scale Enter the Scale menu
inp1 Input 1 Calibrate input 1 signal or program input 1
value
dis1 Display 1 Program display 1 value
inp2 Input 2 Calibrate input 2 signal or program input 2
value
dis2 Display 2 Program display 2 value
err Error Error, calibration not successful, check signal
pass Password Enter the Password menu
unlC Unlocked Program password to lock meter
loCd Locked Enter password to unlock meter
9999
-1999 Flashing display Overrange condition
Underrange condition