Precision Digital Corporation ProtEX-MAX PD8-7000 User manual

ProtEX-MAX PD8-7000 Explosion-Proof
Temperature Meter Instruction Manual
PRECISION DIGITAL CORPORATION
233 South Street • Hopkinton MA 01748 USA
Tel [phone] • Fax [phone] www.predig.com
Temperature
•Thermocouple: J, K, T, E, R, S, B, N, C
•RTD: 100Ω Pt, 10Ω Cu, 120Ω Ni, 1000Ω Pt inputs
•1° or 0.1° Resolution
•Displays up to 3300 F
•Averages up to 10 RTD Sensors
•Automatic Cold Junction Compensation
•Modern, Sleek and Practical Enclosure
•Display Mountable at 0°, 90°, 180°, & 270° Degrees
•Explosion-Proof, IP68, NEMA 4X Enclosure
•SafeTouch®Through-Glass Button Programming
•Flanges for Wall or Pipe Mounting
•Superluminous Sunlight Readable Display
•Free USB Programming Software & Cable
•4 Relays + Isolated 4-20 mA Output Option
•USB, RS-232, & RS-485 Serial Communication Options
•Input Power Options Include 85-265 VAC or 12-24 VDC
USB Install

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
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Disclaimer
The information contained in this document is subject to change without notice. Precision
Digital 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.
CAUTION: Read complete
instructions prior to installation
and operation of the meter.
WARNING: Risk of electric
shock or personal injury.
Warning!
•This product is not recommended for life support applications or applica-
tions where malfunctioning could result in personal injury or property
loss. Anyone using this product for such applications does so at his/her
own risk. Precision Digital Corporation shall not be held liable for dam-
ages resulting from such improper use.
•Failure to follow installation guidelines could result in death or serious in-
jury. Make sure only qualified personnel perform the installation.
•Never remove the instrument cover in explosive environments when the
circuit is live.
•Cover must be fully engaged to meet flameproof/explosion-proof require-
ments.
•Information in this manual supersedes all enclosure, compliance, and
agency approval information included in additional product manuals in-
cluded with this product.
Limited Warranty
Precision Digital Corporation warrants this product against defects in material or
workmanship for the specified period under “Specifications” from the date of shipment from
the factory. Precision Digital’s liability under this limited warranty shall not exceed the
purchase value, repair, or replacement of the defective unit.
Registered Trademarks
MeterView®Pro is a registered trademark of Precision Digital Corporation. All other trademarks
mentioned in this document are the property of their respective owners.
© 2018 Precision Digital Corporation. All rights reserved.
www.predig.com
!

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
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Table of Contents
Table of Contents-----------------------------------------3
Table of Figures -------------------------------------------4
Introduction-------------------------------------------------4
Ordering Information ------------------------------------5
Specifications----------------------------------------------6
General------------------------------------------------------------6
Temperature Input---------------------------------------------7
Relays -------------------------------------------------------------7
Isolated 4-20 mA Output ------------------------------------8
Serial Communications--------------------------------------8
Digital Inputs & Outputs-------------------------------------8
MeterView Pro --------------------------------------------------8
Product Ratings and Approvals;-------------------------9
Compliance Information ------------------------------ 10
Safety------------------------------------------------------------10
Electromagnetic Compatibility--------------------------10
Safety Information-------------------------------------- 11
Installation ------------------------------------------------ 11
Unpacking------------------------------------------------------11
Pre-Installed Conduit/Stopping Plug------------------12
Mounting -------------------------------------------------------12
Cover Jam Screw--------------------------------------------12
Connections---------------------------------------------------13
Required & Factory Wired Connection---------------13
Connectors Labeling--------------------------------------14
Power Connections ---------------------------------------14
Signal Connections ---------------------------------------15
Connections for Averaging RTD Sensors-----------16
Serial Communications Connections-----------------16
Using PROVU Serial Adapters---------------------------18
Relay Connections ----------------------------------------19
Switching Inductive Loads-------------------------------19
F4 Digital Input Connections----------------------------20
4-20 mA Output Connections---------------------------20
Power Supply for Analog Output Loop or Other
Uses ----------------------------------------------------------20
Interlock Relay Feature ----------------------------------20
Digital I/O Connections-----------------------------------21
External Switch Contacts--------------------------------21
Setup and Programming------------------------------ 22
SafeTouch®Buttons----------------------------------------22
Front Buttons and Status LED Indicators-----------23
MeterView®Pro Software ---------------------------------24
MeterView Pro Installation ------------------------------24
Display Functions & Messages-------------------------25
Main Menu -----------------------------------------------------27
Setting Numeric Values -----------------------------------27
Setting Up the Meter (setup)-----------------------------28
Setting the Input Signal (Input) -----------------------29
Selecting the Temperature Scale (F or C)---------29
Setting the Decimal Point (dEc pt)-------------------29
Setting the Display Parameter & Intensity (dsplay)
-----------------------------------------------------------------29
Setting the Input Units or Custom Tags (units)---30
Setting the Relay Operation (relay) -----------------30
Setting the Relay Action ---------------------------------- 31
Programming Set and Reset Points------------------ 31
Setting Fail-Safe Operation----------------------------- 31
Programming Time Delay------------------------------- 31
Relay Action for Loss of Input (Input Break)-------- 31
Relay and Alarm Operation Diagrams---------------- 32
High Alarm Operation (Set > Reset)------------------ 32
Low Alarm Operation (Set < Reset) ------------------ 32
High Alarm with Fail-Safe Operation (Set > Reset)
----------------------------------------------------------------- 32
Low Alarm with Fail-Safe Operation (Set < Reset)32
Pump Alternation Control Operation------------------ 33
Relay Sampling Operation------------------------------ 33
Signal Loss or Input Break Relay Operation ------- 34
Time Delay Operation------------------------------------ 34
Relay Operation Details----------------------------------- 35
Overview----------------------------------------------------- 35
Relays Auto Initialization -------------------------------- 35
Fail-Safe Operation--------------------------------------- 35
Front Panel LEDs ----------------------------------------- 35
Latching and Non-Latching Relay Operation------- 36
Non-Latching Relay (Auto) ----------------------------- 36
Non-Latching Relay (A-nman)-------------------------- 36
Latching Relay (LatcH) ---------------------------------- 36
Latching Relay (Lt-Clr)--------------------------------- 36
Acknowledging Relays----------------------------------- 37
Setting Up the Interlock Relay (Force On) Feature37
Scaling the 4-20 mA Analog Output (Aout)--------- 38
Reset Menu (reset)----------------------------------------- 38
Control Menu (Contrl)------------------------------------- 38
Setting Up the Password (pass)------------------------ 39
Protecting or Locking the Meter ----------------------- 39
Making Changes to a Password Protected Meter- 39
Disabling Password Protection ------------------------ 39
Advanced Features Menu -------------------------------- 40
Advanced Features Menu & Display Messages--- 40
Offset Adjust (Adjust) ----------------------------------- 41
Recalibration of the Meter (t CAL)-------------------- 42
Noise Filter (filter) ------------------------------------- 43
Noise Filter Bypass (bypass)--------------------------- 43
Rounding Feature (round)------------------------------ 43
Modbus RTU Serial Communications (serial)--- 43
Serial Communications Overview--------------------- 44
Select Menu (SElect)------------------------------------ 45
Analog Output Programming (AoutPr) -------------- 45
Programmable Function Keys User Menu (user)- 46
Internal Temperature Calibration (ICAL)------------- 47
Meter Operation------------------------------------------49
Front Buttons Operation---------------------------------- 49
SafeTouch®Buttons---------------------------------------- 49
F4 Operation -------------------------------------------------- 50
Maximum/Minimum Readings--------------------------- 50
Troubleshooting-----------------------------------------51
Diagnostics Menu (diag)---------------------------------- 51
Determining Software Version ------------------------- 51
Reset Meter to Factory Defaults------------------------ 51

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
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Factory Defaults & User Settings----------------------52
Troubleshooting Tips --------------------------------------53
Service ----------------------------------------------------- 54
Mounting Dimensions ---------------------------------55
EU Declaration of Conformity-----------------------57
Table of Figures
Figure 1: Integrated ProVu Required Connections.. 13
Figure 2. Connector Labeling for Fully Loaded PD8-
7000...................................................................... 14
Figure 3. Power Connections..................................... 14
Figure 4. Thermocouple Input Connections............. 15
Figure 5. Three-Wire RTD Input Connections........... 15
Figure 6. Two-Wire RTD Input Connections ............. 15
Figure 7. Four-Wire RTD Input Connections............. 15
Figure 8. Average Temperature RTD Input
Connections ........................................................ 16
Figure 9: ProtEX-MAX Connections to a Serial
Converter............................................................. 16
Figure 10. Three-Wire RS485 Connection................. 16
Figure 11: RS-485 Wiring............................................ 17
Figure 12: RS-485 Two-Wire Multi-Drop Wiring........ 18
Figure 13. Relay Connections.....................................19
Figure 14. AC and DC Loads Protection....................19
Figure 15. Low Voltage DC Loads Protection ...........19
Figure 16. F4 Digital Input Connections ....................20
Figure 17. 4-20 mA Output Connections....................20
Figure 18. Interlock Connections ...............................20
Figure 19: Digital I/O Connections .............................21
Figure 20. Acknowledge Relays w/Function Key or
Digital Input..........................................................37
Figure 21: General Four-Wire Network Connection..44
Figure 22: General Two-Wire Network Connection...44
Figure 23: Enclosure Dimensions –Front View........55
Figure 24: Enclosure Dimensions –Side Cross
Section View.........................................................55
Introduction
The ProtEX-MAX PD8-7000 offers all the functionality of the ProVu PD7000 as a fully FM, CSA,
ATEX, and IECEx approved explosion-proof product. It accepts a direct temperature input from a
wide range of temperature measurement devices (type J, K, T, E, R, S, B, N, and C thermocouples
and 100 or 1000 Ω platinum, 10 Ω copper, 120 Ω nickel RTDs). It displays the measured
temperature in either degrees Fahrenheit or degrees Celsius on a dual-line, 6-digit SunBright®
sunlight readable display. The meter includes automatic cold junction compensation for
thermocouples and the ability to average up to ten (10) RTD sensors. The PD8-7000 can be
equipped with up to four internal relays and a 4-20 mA analog output. It can be programmed and
operated without opening the housing by using the built-in SafeTouch® through-glass buttons or
the RS485 serial communication port with free Modbus® protocol.

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
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Ordering Information
SunBright Display Models
85-265 VAC Model
12-24 VDC Model
Options Installed
PD8-7000-6H0
PD8-7000-7H0
No options
PD8-7000-6H7
PD8-7000-7H7
4 relays & 4-20 mA output
WARNING - Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Accessories
Model
Description
PDA1232
RS-232 serial adapter
PDA1485
RS-485 serial adapter
PDA7485-I
RS-232 to RS-422/485 isolated converter
PDA8232-N
USB to RS-232 non-isolated converter
PDA8485-I
USB to RS-422/485 isolated converter
PDX6901
Suppressor (snubber): 0.01 µF/470 , 250 VAC

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
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Specifications
Except where noted all specifications apply to operation at +25°C.
General
Display
Line 1: 0.60" (15 mm) high red LEDs;
Line 2: 0.46" (12 mm) high red LEDs.
Both displays have six characters with
leading zero blanking. Temperature value is
four or five-digit F/C, based on configuration.
Resolution
1or 0.1for all thermocouples and RTD
inputs
Display
Intensity
Eight user selectable intensity levels
Display
Update Rate
5/second (200 ms)
Overrange
Display flashes 99999
Underrange
Display flashes -9999
Programming
Methods
Four front panel buttons, digital inputs, PC and
MeterView®Pro software, or Modbus registers.
Noise Filter
Programmable from 2 to 199 (0 will disable
filter)
Filter Bypass
Programmable from 0.1 to 99.9% of
calibrated span
Recalibration
All ranges are calibrated at the factory.
Recalibration is recommended at least every
12 months.
Max/Min
Display
Max/min readings reached by the process
are stored until reset by the user or until
power to the meter is cycled.
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.
Non-Volatile
Memory
All programmed settings are stored in non-
volatile memory for a minimum of ten years
if power is lost.
Power
Options
85-265 VAC 50/60 Hz, 90-265 VDC, 20 W
max or 12-24 VDC 10%, 15W max
Powered over USB for configuration only
Fuse
Required external fuse: UL Recognized, 5 A
max, slow blow; up to 6 meters may share
one 5 A fuse
Normal Mode
Rejection
Greater than 60 dB at 50/60 Hz
Isolation
4 kV input/output-to-power line
500 V input-to-output
Overvoltage
Category
Installation Overvoltage Category II:
Local level with smaller transient
overvoltages than Installation Overvoltage
Category III.
Environmental
T6 Class operating temperature range Ta =
-20 to 60°C
T5 Class operating temperature range Ta =
-20 to 65°C
Max Power
Dissipation
Maximum power dissipation limited to 15.1
W.
Connections
Screw terminals accept 12 to 22 AWG wire
Enclosure
Explosion-proof die cast aluminum with
glass window, corrosion resistant epoxy
coating, color: blue.
NEMA 4X, 7, & 9, IP68.
Default conduit connections: Four ¾" NPT
threaded conduit openings and two ¾" NPT
metal conduit plugs with 12 mm hex key
fitting installed. Additional conduit opening
configurations may be available; verify
quantity and sizes on specific device
labeling during installation.
Mounting
Four slotted flanges for wall mounting or
NPS 1½" to 2½" or DN 40 to 65 mm pipe
mounting. See Mounting Dimensions on
page 55.
Tightening
Torque
Screw terminal connectors: 5 lb-in (0.56 Nm)
Overall
Dimensions
6.42" x 7.97" x 8.47" (W x H x D)
(163 mm x 202 mm x 215 mm)
Weight
16.0 lbs (7.26 kg)
Warranty
3 years parts & labor
F4 Digital
Input
Contacts
3.3 VDC on contact. Connect normally open
contacts across F4 to COM.
F4 Digital
Input
Logic Levels
Logic High: 3 to 5 VDC
Logic Low: 0 to 1.25 VDC

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
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Temperature Input
Inputs
Thermocouple: J, K, T, E, R, S, B, N, C;
RTD: 100 Ω platinum (0.00385 & 0.00392
coefficients),
10 Ω copper, 120 Ω nickel, 1000 Ω platinum
(0.00385 & 0.00392 coefficients)
Cold
Junction
Reference
Automatic, fixed, no user calibration needed
Temperature
Drift
2C maximum from 0 to 65C ambient
temperature
4C maximum from -20 to 0C ambient
temperature
Offset
Adjustment
User programmable offset adjust ±50.0
degrees. This parameter allows the user to
apply an offset value to the temperature
being displayed.
Input
Impedance
Greater than 100 k
Sensor Break
Detection
Open TC or RTD sensor indicated by
display flashing oPEn,
relays can be programmed to go “On”, “Off”,
or to “Ignore” (Note: Ignore is detected as an
upscale condition).
Analog output goes to the programmed
sensor break value.
RTD
Averaging
Up to 10 RTDs connected in parallel can be
averaged.
Accuracy & Ranges
Type
Range (°F)
Accuracy
Range (°C)
Accuracy
J
-200 to 2000
±1.8°F
-129 to 1093
±1°C
K
-200 to 2400
±1.8°F
-129 to 1316
±1°C
T
-200 to 752
±1.8°F
-129 to 400
±1°C
E
-200 to 1800
±1.8°F
-129 to 982
±1°C
R
-50 to 3000
±3.6°F
-46 to 1649
±2°C
S
-50 to 3000
±3.6°F
-46 to 1649
±2°C
B
752 to 3300
±3.6°F
400 to 1816
±2°C
N
-100 to 2300
±3.6°F
-73 to 1260
±2°C
C
32 to 4100
±3.6°F
0 to 2260
±2°C
10
-328 to 500
±0.2°F
-200 to 260
±0.1°C
100
-328 to 1562
±0.7°F
-200 to 850
±0.4°C
120
-110 to 500
±0.2°F
-79 to 260
±0.1°C
1000
-328 to 900
±0.7°F
-200 to 482
±0.4°C
Relays
Rating
4 SPDT (Form C) internal and/or 4 SPST
(Form A) external; 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
page 19 for details.
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 (turn off).
Relay
Operation
Automatic (non-latching)
Latching (requires manual acknowledge)
Sampling (based on time)
Relay alternation control (2 to 4 relays)
Off (disable unused relays and enable
Interlock feature)
Manual on/off control mode
Relay Reset
User selectable via front panel buttons or
digital inputs
1. Automatic reset only (non-latching),
when the 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 (L)
Note: Front panel button 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 reflect the state of the input to the meter.

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
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Isolated 4-20 mA Output
Output
Source
PV (temperature), max, min, set points 1-4,
Modbus PV input, or manual control mode
Scaling
Range
1.000 to 23.000 mA for any display range
Calibration
Factory calibrated 0.0 to 2000.0 = 4-20 mA
output
Analog Out
Programming
23.000 mA maximum for all parameters:
Overrange, underrange, max, min, and
break
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 -20 to 0C ambient
Note: Analog output drift is separate from input
drift.
Power Supply
For Analog
Output Loop
Or Other
Uses
Terminals I+ &R: 24 VDC10%.May be used
to power the 4-20 mA output or other
devices. Refer to Figure 6 on page 14 and
Figure 17 on page 20.
All models @25mAmax.
External
Loop Power
Supply
35 VDC maximum
Output Loop
Resistance
Power supply
Minimum
Maximum
24 VDC
10 
700 
35 VDC
(external)
100 
1200 
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)
Slave Id
1 –247 (Meter address)
Baud Rate
300 –19,200 bps
Transmit
Time Delay
Programmable between 0 and 199 ms
Data
8 bit (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 to 2.54 sec
Turn Around
Delay
Less than 2 ms (fixed)
Note: Refer to the PROVU®Modbus Register Tables located
at www.predig.com for details.
Digital Inputs & Outputs
Channels
4 digital inputs & 4 digital outputs per
module
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 termi-
nal (pin 1) to power exter-
nal devices.
Function
Assignment
The on-board digital inputs (1-4) are
designed to mimic the behavior of the
front panel buttons (Menu, F1, F2, &
F3).
If you wish to change their behavior, re-
assign F1-F3 to the desired function,
then change the corresponding digital
input to match.
MeterView Pro
System Require-
ments
Microsoft®Windows®XP/Vista/7/8/10
Communications
USB 2.0 (Standard USB A to Micro USB
B)
Configuration
Configure device settings one at a time

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
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Product Ratings and Approvals;
FM
Enclosure: Type 4X; IP66
Class I, Division 1, Groups B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1, T5/T6
Class I, Zone 1, AEx d, IIC Gb T5/T6
Zone 21, AEx tb IIIC T90°C; Ta -40°C to +65°C
T6 Ta = -40°C to +60°C; T5 Ta = -40°C to +65°C
Certificate Number: 3047283
CSA
Class I, Division 1, Groups B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1
Class I Zone 1 Ex d IIC
Zone 21 Ex tb IIIC T90°C
-40°C < Tamb. < +60° C; Temperature Code T6
-40°C < Tamb. < +65° C; Temperature Code T5
Enclosure Type 4X & IP66
Certificate Number: 2531731
ATEX
II 2 G D
Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Ta = -40°C to +*°C
*T6 = -40°C to +60°C
*T5 = -40°C to +65°C
Certificate number: Sira 12ATEX1182
IECEx
Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Ta = -40°C to +*°C
*T6 = -40°C to +60°C
*T5 = -40°C to +65°C
Certificate Number: IECEx SIR 12.0073
Special Conditions for Safe Use:
Use suitably certified and dimensioned cable entry device and/or plug. The equipment shall be
installed such that the supply cable is protected from mechanical damage. The cable shall not
be subjected to tension or torque. If the cable is to be terminated within an explosive atmos-
phere, then appropriate protection of the free end of the cable shall be provided. Cable must be
suitable for 90°C.
Year of Construction
This information is contained within the serial number with the first four digits representing the
year and month in the YYMM format.
For European Community: The ProtEX-MAX must be installed in accordance with the ATEX
directive 94/9/EC, and the product certificate Sira 12ATEX1182.

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
10
Compliance Information
Safety
UL & c-UL Listed
USA & Canada
UL 508 Industrial Control Equipment
UL File Number
E160849
Front Panel
UL Type 4X, NEMA 4X, IP65; panel gasket provided
Low Voltage
Directive
EN 61010-1:2010
Safety requirements for measurement, control, and laboratory use
Electromagnetic Compatibility
Emissions
EN 55022:2010
Class A ITE emissions requirements
Radiated
Emissions
Class A
AC Mains
Conducted
Emissions
Class A
Immunity
EN 61326-1:2013
Measurement, control, and laboratory equipment
EN 61000-6-2:2005
EMC heavy industrial generic immunity standard
RFI - Amplitude
Modulated
80 -1000 MHz 10 V/m 80% AM (1 kHz)
1.4 - 2.0 GHz 3 V/m 80% AM (1 kHz)
2.0 - 2.7 GHz 1 V/m 80% AM (1 kHz)
Electrical Fast
Transients
±2kV AC mains, ±1kV other
Electrostatic
Discharge
±4kV contact, ±8kV air
RFI - Conducted
10V, 0.15-80 MHz, 1kHz 80% AM
AC Surge
±2kV Common, ±1kV Differential
Surge
1KV (CM)
Power-Frequency
Magnetic Field
30 A/m 70%V for 0.5 period
Voltage Dips
40%V for 5 & 50 periods
70%V for 25 periods
Voltage
Interruptions
<5%V for 250 periods
Note:
Testing was conducted on PD8-7000 meters installed through the covers of grounded metal
enclosures with cable shields grounded at the point of entry representing installations designed to
optimize EMC performance.
Declaration of Conformity available at www.predig.com

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
11
Safety Information
WARNINGS
•Read complete instructions prior to installation and operation of the instrument.
•Installation and service should be performed only by trained service personnel. Service
requiring replacement of internal sub-components must be performed at the factory.
•Disconnect from supply before opening enclosure. Keep cover tight while circuits are alive.
Conduit seals must be installed within 18" (450mm) of the enclosure or within 2" (50mm) for
Zone installations.
•Verify that the operating atmosphere of the instrument is consistent with the appropriate
hazardous locations certifications.
•If the instrument is installed in a high voltage environment and a fault or installation error
occurs, high voltage may be present on any lead
•Read all product labels completely and follow all instructions and requirements listed on the
labels for installation or service.
Installation
Install in accordance with applicable local and national regulations (e.g. NEC).
For Installation in USA: The ProtEX-MAX must be installed in accordance with the National Electrical
Code (NEC) NFPA 70.
For Installation in Canada: The ProtEX-MAX must be installed in accordance with the Canadian Electri-
cal Code CSA 22.1. All power supplies below 36 V and input circuits must be derived from a CSA Ap-
proved Class 2 source.
For European Community: The ProtEX-MAX must be installed in accordance with the ATEX directive
94/9/EC and the product certificate Sira 12ATEX1182.
WARNING
Disconnect from supply before opening enclosure. Keep
cover tight while circuits are alive. Conduit seals must be in-
stalled within 18" (450mm) of the enclosure or within 2"
(50mm) for Zone installations.
Wiring connectors are accessed by opening the enclosure. To access electrical connectors, remove the 2
captive screws and then remove the electronics module. Connectors are on the rear of the electronics
module.
Unpacking
Remove the instrument from packing box. Inspect the packaging and contents for damage. Report dam-
ages, if any, to the carrier.
If any part is missing or the instrument malfunctions, please contact your supplier or the factory for assis-
tance.

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
12
Pre-Installed Conduit/Stopping Plug
The PD8-6000 is supplied with two pre-installed conduit plugs for installations that do not require the use
of all conduit entries. The conduit/stopping plugs include an internal 12mm hexagonal socket recess for
removal. The pre-installed plugs and their installation are included in the hazardous area approvals for
the PD8 Series enclosure.
WARNING
In hazardous areas, conduit and conduit/stopping plugs require
the application of non-setting (solvent free) thread sealant. It is
critical that all relevant hazardous area guidelines be followed
for the installation or replacement of conduit or plugs.
Mounting
The ProtEX-MAX has four slotted mounting flanges that should be used for pipe mounting or wall mount-
ing. Refer to Mounting Dimensions, page 55 for details.
WARNING
Do not attempt to loosen or remove flange bolts
while the instrument is in service.
Cover Jam Screw
The cover jam screw should be properly installed once the instrument has been wired and tested in a
safe environment. The cover jam screw is intended to prevent the removal of the instrument cover in a
flameproof environment without the use of tools. Using a M2 hex wrench, turn the screw clockwise until
the screw contacts the aluminum enclosure. Turn the screw an additional 1/4 to 1/2 turn to secure the
cover. Caution: Excess torque may damage the threads and/or wrench.

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
13
Connections
WARNINGS
•Static electricity can damage sensitive components.
•Observe safe handling precautions for static-sensitive components.
•Use proper grounding procedures/codes.
•If the instrument is installed in a high voltage environment and a
fault or installation error occurs, high voltage may be present on
any lead or terminal.
•Follow all fusing and wiring precautions requirements for the in-
strument integrated to the PD8 Series model number being con-
nected.
To access the connectors, remove the enclosure cover and unscrew the two captive screws that fasten
the electronics module. Signal connections are made to de-pluggable connectors on the back of the elec-
tronics module.
Some connectors may be provided already connected. These connections are required for proper opera-
tion of the ProtEX-MAX and should not be removed unless instructed to by this manual.
Wires marked as being used for testing purposes should be removed.
Grounding connections are made to the two ground screws provided on the base –one internal and one
external.
After all connections have been completed and verified, apply power to the unit.
Required & Factory Wired Connection
The ProtEX-MAX comes with a pre-wired connection. This connection is detailed below, and must be
maintained in order for the instrument to function properly.
WARNING
Observe all safety regulations. Electrical wiring should be performed
in accordance with all agency requirements and applicable national,
state, and local codes to prevent damage to the meter and ensure
personnel safety.
Figure 1: Integrated ProVu Required Connections

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
14
Connectors Labeling
The connectors’label, affixed to the meter, shows the location of all connectors available with requested
configuration.
Warning!
Do not connect any equipment other than Precision
Digital’s expansion modules, cables, or meters to the
RJ45 M-LINK connector. Otherwise damage will
occur to the equipment and the meter.
Figure 2. Connector Labeling for Fully Loaded PD8-7000
Power Connections
Power connections are made to a two-terminal connector labeled POWER on Figure 2. The meter will
operate regardless of DC polarity connection. The + and - symbols are only a suggested wiring convention.
Figure 3. Power Connections
AC or DC
POWER
Required External Fuse:
5 A max, 250 V Slow Blow
POWER
+-

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
15
Signal Connections
Signal connections are made to a three-terminal connector labeled SIGNAL on Figure 2.
Thermocouple and RTD Connections
The following figures show examples for thermocouple and RTD connections.
The TYPE selector switch must be set to the proper position for the meter to accept the selected RTD or
TC input.
The RANGE selector switch is used to select 100-ohm platinum or 10-ohm copper RTD. The 1000-ohm
platinum RTD input uses the same setting as the 100-ohm RTD.
The input type is selected using the Setup menu.
The selected thermocouple input must correspond to the thermocouple sensor and wire type used.
The meter accepts two, three, or four-wire RTDs. The three-wire RTD connection has built-in lead wire
compensation.
Lead wire compensation for two-wire RTDs can be applied using the Adjust menu. See the Advanced
Features Menu on page 40.
The four-wire RTD connection is similar to the three-wire. One of the leads of a four-wire RTD is not
connected and may be clipped off.
The three-wire connection provides sufficient lead wire compensation to obtain accurate readings even
with long leads.
Figure 4. Thermocouple Input
Connections
Figure 5. Three-Wire RTD Input
Connections
Figure 6. Two-Wire RTD Input
Connections
Figure 7. Four-Wire RTD Input
Connections
SIGNAL
EXC T+ COM
1 2 3 RTD
TYPE
TC 100
RANGE
10
M-LINK
1 2 3 4 5 6 7 8
-
+
TC
RTD
Sensor
SIGNAL
EXC T+ COM
1 2 3 RTD
TYPE
TC 100
RANGE
10
M-LINK
1 2 3 4 5 6 7 8
RTD
Sensor
SIGNAL
EXC T+ COM
1 2 3 RTD
TYPE
TC 100
RANGE
10
M-LINK
1 2 3 4 5 6 7 8
RTD
Sensor
SIGNAL
EXC T+ COM
1 2 3 RTD
TYPE
TC 100
RANGE
10
M-LINK
1 2 3 4 5 6 7 8
NC

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
16
Connections for Averaging RTD Sensors
To obtain the average temperature from 2 to 10 RTD sensors, connect all the sensors in parallel and
select the number of sensors in the RTD Total (rtdtot) menu. See the Advanced Features Menu on
page 40.
Figure 8. Average Temperature RTD Input Connections
Serial Communications Connections
The ProtEX-MAX has a 5 position terminal block for connecting RS-485 serial devices.
Figure 9 details the wiring connections from the ProtEX-MAX to an RS-485 serial converter (such as the
PDA7485 or PDA8485) for a four-wire network.
ProtEX-MAX to RS-485
Serial Converter Connections
RS-485 Serial
Converter
ProtEX-MAX RS-
485 Connections
DO
DI
DO
DI
DI
DO
DI
DO
Figure 9: ProtEX-MAX Connections to a Serial Converter
The ProtEX-MAX has three diagnostic LEDs: a Power (P) LED to show when the module is powered
properly, a Transmit Data (TX) LED to show when the module is being transmitted to by the PC side, and
a Receive Data (RX) LED to show when the module is sending data to a receiving device.
The following diagrams detail how to connect the RS-485 serial communications from the ProtEX-MAX to
a RS-485/RS-232 serial converter (PDA7485) in four wire and two wire configurations.
Three Wire Connections
In order to wire the 5 pins for use as a 3-wire half-duplex RS-485 connection, it is necessary to create a
jumper connection between DI –DO and DI- –DO- as shown below.
Figure 10. Three-Wire RS485 Connection
RTD1
SIGNAL
EXC T+ COM
1 2 3 RTD
TYPE
TC 100
RANGE
10
M-LINK
1 2 3 4 5 6 7 8
RTD2 RTD3
F4 COM DI DI DO DO
TX
RX 1 2 3 4 51 2

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
17
Figure 11: RS-485 Wiring
Notes:
1. Termination resistors are optional and values depend on the cable length and characteristic im-
pedance. Consult the cable manufacturer for recommendations.
2. Refer to RS-232 to RS-485 Converter documentation for further details.
3. Use shielded cable, twisted-pairs plus ground. Connect ground shield only at one location.
WARNING
Observe all safety regulations. Electrical wiring should be performed
in accordance with all agency requirements and applicable national,
state, and local codes to prevent damage to the meter and ensure
personnel safety.

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
18
Figure 12: RS-485 Two-Wire Multi-Drop Wiring
Notes:
1. Termination resistors are optional and values depend on the cable length and characteristic im-
pedance. Consult the cable manufacturer for recommendations.
2. Refer to RS-232 to RS-485 Converter documentation for further details.
3. Use shielded cable, twisted-pair plus ground. Connect ground shield only at one location.
WARNING
Observe all safety regulations. Electrical wiring should be performed
in accordance with all agency requirements and applicable national,
state, and local codes to prevent damage to the meter and ensure
personnel safety.
When using more than one instrument in a multi-drop or multi-point mode, each meter must be provided
with its own unique address.
Using PROVU Serial Adapters
NOTICE
PROVUexpansion modules and serial adapters are not included in
the hazardous area approvals of the ProtEX-MAX. The PDA1232
may be used only while the ProtEX-MAX is in a safe area, and will
disable some features while installed.
PROVU expansion modules and serial adapters are not recommended for use with the ProtEX-MAX. It is
recommended that any serial protocol conversion required on the RS-485 communications connection be
performed using a PDA7485 RS-232 to RS-485 or PDA8485 USB to RS-485 serial converter located in a
safe area.
!

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
19
Relay Connections
Relay connections are made to two six-terminal connectors labeled RELAY1 –RELAY4 on Figure 2.
Each relay’s C terminal is common only to the normally open (NO) and normally closed (NC) contacts of
the corresponding relay. The relays’ C terminals should not be confused with the COM (common) terminal
of the INPUT SIGNAL connector.
Figure 13. Relay Connections
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 14. AC and DC Loads Protection
Choose R and C as follows:
R: 0.5 to 1 Ωfor each volt across the contacts
C: 0.5 to 1 µF for each amp through closed contacts
Notes:
1. Use capacitors rated for 250 VAC.
2. RC networks may affect load release time of solenoid loads. Check to confirm proper operation.
3. 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 15. 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.
CNONO NC NC C
RELAY4 RELAY3
4 36 5 2 1
CNONO NC NC C
RELAY2 RELAY1
4 36 5 2 1
C
R
C
R
Use a diode with a reverse
breakdown voltage two to three
times the circuit voltage and for-
ward current at least as large as
the load current.

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
20
F4 Digital Input Connections
A digital input, F4, is standard on the meter. This digital input connected with a normally open closure
across F4 and COM, or with an active low signal applied to F4.
Figure 16. F4 Digital Input Connections
4-20 mA Output Connections
Connections for the 4-20 mA output are made to the connector terminals labeled MA OUT. The 4-20 mA
output may be powered internally or from an external power supply.
Figure 17. 4-20 mA Output Connections
Power Supply for Analog Output Loop or Other Uses
The internal 24 VDC power supply powering the analog output may be used to power other devices, if the
analog output is not used. The I+ terminal is the +24 V and the R terminal is the return.
Interlock Relay Feature
As the name implies, the interlock relay feature reassigns one, or more, alarm/control relays for use as
interlock relay(s). Interlock contact(s) are wired to digital input(s) and trigger the interlock relay. This
feature is enabled by configuring the relay, and relative digital input(s) (see page 37). In one example, dry
interlock contacts are connected in series to one digital input which will be used to force on (energize) the
assigned interlock power relay when all interlock contacts are closed (safe). The interlock relay front
panel LED flashes when locked out. The interlock relay would be wired in-series with the load (N/O
contact). See below.
Figure 18. Interlock Connections
12-35 VDC
Power
Supply
+
4-20 mA
Input Meter
-
+
RI- I+
13 2
RELAY1
3 2 1
24 V
-
4-20 mA Input
Remote Display,
Chart Recorder, Etc.
-
+
RI- I+
MA OUT
13 2
RELAY1
3 2 1
24 V
MA OUT