Precision Digital Corporation ProtEX-MAX PD8-150 Series User manual

PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
PRECISION DIGITAL CORPORATION
233 South Street • Hopkinton MA 01748 USA
Tel [phone] • Fax [phone]
www.predig.com
•CSA Certified Explosion-Proof Annunciators
•Switch, Open Collector NPN Transistor, and Logic Level Inputs
•4- or 8-Point Monitoring
•8 Field Selectable ISA Sequences Including First-Out
•Multiple-Unit First-Out Indication
•Free Custom Message Labels
•Silence, Acknowledge, and Reset Functions
•Sunlight Readable Indication
•SafeTouch Through-Glass Button Programming
•Annunciator Mountable at 0°, 90°, 180°, & 270°
•24 VDC @ 200 mA Power Available to Drive Other Devices (AC Models)
•2 SPDT Relays for Alarm Activated Devices
•Operating Temperature Range: -55 to 65°C (-67 to 149°F)
•CSA Certified as Explosion-Proof / Dust-Ignition-Proof / Flame-Proof
•Input Power Options Include 85-265 VAC or 12-36 VDC
•Built-in internal Audible Alarm with Silence Pushbutton
•Flanges for Wall or Pipe Mounting
•Explosion-Proof Aluminum or Stainless Steel NEMA 4X / IP68 Enclosures
•Four 3/4" NPT Threaded Conduit Openings
•Pipe Mounting Kits
•Stainless Steel Tag Available
•3-Year Warranty

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ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
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.
See Warranty Information and Terms &
Conditions on www.predig.com for complete
details.
•Read complete instructions prior to installation
and operation of the annunciator.
•Risk of electric shock or personal injury.
•This product is not recommended for life support
applications or applications 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 damages
resulting from such improper use.
•Failure to follow installation guidelines could
result in death or serious injury. Make sure only
qualified personnel perform the installation.
•Never remove the annunciator cover in explosive
environments when the circuit is live.
•Cover must be fully engaged to meet
explosion-proof/dust-ignition-proof/flame-proof
requirements.
WARNING
Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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.
See Warranty Information and Terms &
Conditions on www.predig.com for complete
details.
Registered Trademarks
All trademarks mentioned in this document are
the property of their respective owners.
© 2023 Precision Digital Corporation.
All rights reserved.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Table of Contents
Introduction......................................................................................................... 7
Ordering Information.......................................................................................... 7
Key Features....................................................................................................... 9
Specifications................................................................................................... 14
General.......................................................................................................... 14
Input .............................................................................................................. 14
Relays............................................................................................................ 15
Enclosure...................................................................................................... 16
General Compliance Information.................................................................... 16
Electromagnetic Compatibility.................................................................... 16
Product Ratings and Approvals.................................................................. 16
EU Declaration of Conformity.......................................................................... 17
Safety Information............................................................................................ 17
Installation......................................................................................................... 17
Unpacking..................................................................................................... 17
Mounting....................................................................................................... 18
Connections...................................................................................................... 20
Required Connections on AC-Powered Models......................................... 20
Required Connections on DC-Powered Models......................................... 20
Vigilante II Electronics Module Layout for PD8-158-6R2........................... 21
Power Connections.................................................................................... 22
Signal Connections.................................................................................... 23
Relays and 24 V Output Connections........................................................ 23
Switching Inductive Loads.......................................................................... 24
External Input Types.................................................................................. 24
External Pushbutton Connections.............................................................. 24
Multiple Unit First-Out Indication Connections........................................... 24
Setup and Programming.................................................................................. 25
Overview....................................................................................................... 25
LED Status Indicators.................................................................................. 25
PD8-154..................................................................................................... 25
PD8-158..................................................................................................... 26
Programming Buttons ................................................................................. 27
SafeTouch Buttons ...................................................................................... 27
Full Function Test ........................................................................................ 28
Multiple Unit First-Out Indication .................................................................. 28
Shared Front Panel Buttons........................................................................ 28
Annunciator Sequence Selection ............................................................... 28
Sequence Programming ............................................................................ 28
Sequence Descriptions.............................................................................. 28
Normally Open/Normally Closed Input Setup............................................ 29
Programming NO/NC Inputs...................................................................... 29
NO/NC Programming Example.................................................................. 29
Relay Operation............................................................................................ 30
Relay 1 Operation...................................................................................... 30
Relay 2 Operation...................................................................................... 30
Relay Fail-Safe .......................................................................................... 30
Programming Relay Fail-Safe.................................................................... 30
Relay Fail-Safe Programming Example..................................................... 30
Relay Operation Overview......................................................................... 31
Audible Alarm Enable/Disable .................................................................... 31
Enabling/Disabling Silence Option............................................................. 31
Silence Pushbutton Enable/Disable........................................................... 31
No Lock-In Sequence Option ...................................................................... 31

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
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Full Sequence Descriptions............................................................................. 32
Features..................................................................................................... 32
Sequence Condition Descriptions.............................................................. 32
LED Condition Descriptions....................................................................... 32
ISA Sequence A............................................................................................ 32
ISA Sequence F2A........................................................................................ 33
ISA Sequence F1A........................................................................................ 33
ISA Sequence F3A........................................................................................ 34
Input Follower Indication............................................................................ 35
ISA Sequence M ........................................................................................... 35
ISA Sequence F1M....................................................................................... 35
ISA Sequence F2M....................................................................................... 36
Troubleshooting............................................................................................... 37
Reset to Factory Defaults............................................................................ 37
Troubleshooting Tips................................................................................... 38

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
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Table of Figures
Figure 1. Example of Free Custom Message Label ......................................... 7
Figure 2. Enclosure Dimensions –Front View............................................... 18
Figure 3. Enclosure Dimensions –Side Cross Section View ....................... 18
Figure 4. Integrated Vigilante II Required Connections for AC-Powered Units.. 20
Figure 5. Integrated Vigilante II Required Connections for DC-Powered Units.. 20
Figure 6. Connector Labeling for PD8-154-6R2-1.......................................... 21
Figure 7. Connector Labeling for PD8-158-6R2-1.......................................... 21
Figure 8. Connector Labeling for PD8-154-7R2-0.......................................... 21
Figure 9. Connector Labeling for PD8-158-7R2-0.......................................... 21
Figure 10. Power Connections........................................................................ 22
Figure 11. NO/NC Contact Inputs.................................................................... 23
Figure 12. Open Collector NPN Transistor Inputs ......................................... 23
Figure 13. Relay & 24 V Output Connections................................................. 23
Figure 14. AC and DC Loads Protection......................................................... 24
Figure 15. Low Voltage DC Loads Protection................................................ 24
Figure 16. External Pushbutton Connections................................................ 24
Figure 17. System with Multiple Units Share First-Out................................. 24
Figure 18. Shared Pushbutton Connections.................................................. 28
Figure 19. DIP Switch Location....................................................................... 28

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
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Introduction
The ProtEX-MAX PD8-150 series offers easy-to-use
explosion-proof annunciators that can be set up to
respond to alarm conditions based on 8 field
selectable alarm sequences, including first-out
indication. With either 4 or 8 switch inputs, the alarm
channels accept normally open, normally closed, NPN
open collector transistor, and logic level inputs. The
annunciator is housed in a field-mountable, NEMA
4X/IP68 rated enclosure available in either aluminum
or stainless steel for convenient indoor and outdoor
installation.
Three front panel pushbuttons are used during
sequence operation to silence the audible alarm,
acknowledge the first out alarm, and reset cleared
channels as required by the sequences. These
functions can also be operated from hazardous-area
remote devices using the remote control signal
connectors, or in hazardous areas using the
SafeTouch through-glass buttons.
The ProtEX-MAX PD8-150 series has two SPDT
relays that can be used for additional external alarm
indication, additional audible devices, or for process
control.
To enhance the look of your ProtEX-MAX
Annunciator, we strongly recommend you order Free
custom message labels. These can be ordered at any
time, just by filling out a convenient on-line form at
Free Custom Message Labels.
Figure 1. Example of Free Custom Message Label
Ordering Information
85-265 VAC Models
Aluminum Enclosure
Model
Description
PD8-154-6R2-1
4-Point Explosion-Proof Annunciator
Powered from 85-265 VAC
PD8-158-6R2-1
8-Point Explosion-Proof Annunciator
Powered from 85-265 VAC
PD8-154-7R2-0
4-Point Explosion-Proof Annunciator
Powered from 12-24 VDC
PD8-158-7R2-0
8-Point Explosion-Proof Annunciator
Powered from 12-24 VDC
Stainless Steel Enclosure
Model
Description
PD8-154-6R2-1-SS
4-Point Explosion-Proof Annunciator
Powered from 85-265 VAC
PD8-158-6R2-1-SS
8-Point Explosion-Proof Annunciator
Powered from 85-265 VAC
PD8-154-7R2-0-SS
4-Point Explosion-Proof Annunciator
Powered from 12-24 VDC
PD8-158-7R2-0-SS
8-Point Explosion-Proof Annunciator
Powered from 12-24 VDC
Accessories
Model
Description
PDA0001
3/4" M-NPT to F-M20 Reducer
PDA0002
3/4" M-NPT to 1/2" F-NPT Reducer
PDAPLUG75
3/4" Metal Conduit/Stopping Plug
PDA-SSTAG
Custom Stainless Steel Tag (see
website for convenient ordering form)
PDA6848
2" U-Bolt Kit Zinc Plated Steel
PDA6848-SS
2" U-Bolt Kit Stainless Steel
-
Free Custom Message Labels
SafeTouch Buttons
To make it possible to program and operate the
ProtEX-MAX in a hazardous area, the programming
buttons that are located behind the glass window can
be operated without removing the cover by using the
SafeTouch through-glass buttons. The operator puts
their finger on the glass over the button and the
button is actuated.
To learn more about SafeTouch buttons,
see this video:
predig.com/videos/Safetouch_Buttons

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Helpful Videos
There are several videos that will help you get a
better understating of the features and functionality of
the ProtEX-MAX products. Since the ProtEX-MAX
annunciators have the same general features and
functionality of the Vigilante II annunciators,
appropriate videos for the Vigilante II annunciators
are also included.
ProtEX-MAX Products Overview
Learn about the complete line of ProtEX-MAX
products.
predig.com/videos/ProtEXMAX_Overview
ProtEX-MAX Products Overview
Learn about Precision Digital's 4- or 8-point
annunciators feature alarming and monitoring
capabilities for all of your level, pressure, flow, and
other process switches..
https://www.predig.com/videos/10V1_vERpvU

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Key Features
Connections for PD8-158-6R2-1
The Only Explosion-Proof Annunciator You Will Ever Need
The ProtEX-MAX PD8-150 series offers full-featured
multipurpose, easy-to use 4- or 8-point annunciators
ideal for alarming and monitoring capabilities for all of
your level, pressure, flow, and other process
switches. The annunciator boasts specifications,
features and functionality that make it the only
hazardous area annunciator you will ever need.
The PD8-154 and PD8-158 have all the same
features as our PD154 and PD158 1/8 DIN
annunciators, and are certified by CSA as
Explosion-Proof / Dust-Ignition-Proof / Flame-Proof.
The first thing you notice about the PD8-154 and
PD8-158 are their modern looking, rugged,
explosion-proof housing with convenient mounting
flanges, available in aluminum or stainless steel.
Housed inside these enclosures is a 4- or 8-point
annunciator with high-intensity LEDs that can be seen
in direct sunlight.
Three front panel pushbuttons are used during
sequence operation to silence the audible alarm,
acknowledge the first out alarm, and reset cleared
channels as required by the sequences. These
functions can also be operated from hazardous-area
remote devices using the remote control signal
connectors, or in hazardous areas using the
SafeTouch through-glass buttons.
The PD8-150 series can be programmed for multiple
sequences with first-out alarm indication. This feature
indicates the first point of failure of a system when
multiple alarms occur. If multiple annunciators are
connected for multiple unit first-out indication, only
one input from all connected devices will display as a
first-out alarm.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Customized Monitoring
Level Monitoring with Level Switches
The ProtEX-MAX Annunciator is ideal for tank level switch
monitoring.
• Up to 8 Individually Labeled Level Switch Inputs
• 24 VDC Level Switch Power Supply
• Relays for External Horns and Light Alarms
• Sunlight Readable Indication
Temp Monitoring with ProtEX-MAX
Instruments
Connect PD8-765 and PD8-7000 alarm relays to the
PD8-154 or PD8-158 for temperature alarm monitoring.
• First-Out Indication for Heating/Cooling Systems
• Multiple Unit First-Out Indication
• Remote Silence, Acknowledge, and Reset
• Fail-Safe Relays for Critical Applications
Multiple Unit First-Out Alarm Indication
If multiple ProtEX-MAX annunciators are connected for
multiple unit first-out indication, only one input from all
connected devices will display as a first-out alarm.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Physical Features
The ProtEX-MAX is designed for ease-of-use in safe
and hazardous area applications, and is housed in a
rugged NEMA 4X explosion-proof enclosure,
available in either aluminum or stainless steel. It can
operate over a wide temperature range (-55° to 60°C /
-67° to 140°F) includes removable screw terminal
connectors, and features through-glass buttons for
easy controller operation without the need to remove
the cover. All of these features are backed by a
3-year warranty.
Super-Bright LED Display
The ProtEX-MAX features super-bright alarm LEDs,
our brightest ever. These allow the display to be read
in any lighting condition, even in direct sunlight.
SafeTouch Through-Glass Buttons
The ProtEX-MAX is equipped with four sensors that
operate as through-glass buttons so that it can be
programmed and operated without removing the
cover (and exposing the electronics) in a hazardous
area. These buttons can be disabled for security by
selecting the DISABLE setting on the NO-CONTACT
BUTTONS switch located on the back of the
electronics module, inside the enclosure.
Rugged, Heavy-Duty Enclosure
The ProtEX-MAX is housed in a rugged NEMA 4X, 7,
& 9, IP68 aluminum or stainless steel enclosure,
designed to withstand harsh environments in safe and
hazardous areas.
Wide Viewing Angle
Customers can’t always look at the display from
straight on, so the window and display module have
been optimized to provide a wide viewing angle of
approximately ±40°; nearly twice that of the
competition.
Built-In Mounting Flanges
The ProtEX-MAX is equipped with two slotted flanges
for wall mounting or NPS 1½" to 2½" or DN 40 to
65 mm pipe mounting.
Flexible Mounting & Wiring
The ProtEX-MAX features four ¾" NPT threaded
conduit openings so that wiring can be routed to the
most convenient conduit connection(s).

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Rotatable Display
The ProtEX-MAX rotatable display, along with four
available conduit connections, provide for numerous
installation options. The display can be rotated in 90°
increments. Rotate it 90° for horizontal mounting.
Vertical Mounting Horizontal Mounting
Perfect & Secure Fit Every Time
The internal cast rails ensure the ProtEX-MAX
assembles together perfectly, quickly and securely;
and everything lines up for optimal viewing every
time. There are no standoffs to worry about breaking
or getting out of alignment. Two spring-loaded,
self-retaining, thumbscrews make the assembly a
snap, while pressing the display as close to the
glass as possible to improve wide angle viewing.
Stainless Steel Tags
PDA-SSTAG is a laser etched stainless steel tag
accessory for any of your Precision Digital meters.
The tag features custom text for equipment
identification, instruction, or whatever else is needed
in your facility. Each tag comes with a stainless steel
wire and lead seal for easy mounting wherever you
need it.
Removable Screw Terminals
Industrial applications require screw terminal
connections for easy field wiring, and the
ProtEX-MAX goes one step further in convenience
by also making them removable.
Hazardous Area Approvals
The ProtEX-MAX is certified by CSA as
Explosion-Proof / Dust-Ignition-Proof / Flame-Proof.
Wide Operating Temperature Range
The ProtEX-MAX can operate from -55 to 60°C
(-67 to 140°F) meaning it can be installed in a wide
variety of indoor and outdoor industrial applications.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Quick Setup Guide
The following overview details how to set up the
annunciator for most common uses.
Order Custom Message Labels
To make your Vigilante Annunciator the best it can
be, the first thing to do is order Free Custom Message
Labels online.
Sequence Selection
The two most common sequences are ISA A and
ISA F2A. Select the sequence using the four-position
switch on the rear of the unit above the signal
connector. For complete sequence details,
see page 32.
ISA A
ISA F2A
NO/NC Inputs
Each input can be set for normally open (NO) or
normally closed (NC) contacts. Each input channel is
programmed individually. The default setting is for all
inputs to be NO.
To set inputs to NC:
1. Press and hold ACK and RESET for
3 seconds until all LEDs cycle.
2. Press ACK within 3 seconds of release. All
LEDs will blink. If ACK is not pressed within
3 seconds, the unit will return to run mode.
3. Press ACK again within 3 seconds of
release. If ACK is not pressed within
3 seconds, the unit will return to run mode.
The LED for the channel being programmed will
display brightly on or off. All other channel indication
LEDs will be at low intensity to indicate programming
mode.
4. Press the RESET pushbutton to turn LED 1
off for a NO input, or on for a NC input for
channel 1.
5. Press ACK to accept the input type and
program channel 2.
6. Repeat steps 4 and 5 for all input channels.
7. Press and hold ACK for five seconds to
return to normal operation with the
programmed input types.
Basic Connections
All connections are made to removable screw
terminal connectors located at the rear of the
instrument. For complete connection details, see
page 18.
•Use copper wire with 60°C or 60/75°C insulation
for all line voltage connections.
•Observe all safety regulations.
•Electrical wiring should be performed in
accordance with all applicable national, state,
and local codes to prevent damage to the
instrument and ensure personnel safety.
Connector Labeling
The connectors label, affixed to the instrument, shows
the location of all connectors available with requested
configuration. See Vigilante II Electronics Module
Layout for PD8-158-6R2 on page 21.
Power Connections
Power connections are made to a two-terminal
connector labeled POWER. The instrument will
operate regardless of DC polarity connection.
The + and - symbols are only a suggested wiring
convention.
Signal Connections
Input signal connections are made to a 14-terminal
connector at terminals labeled INPUT CHANNELS.
The COM (common) terminal is the return for all input
channels.
Relays and 24 V Output Connections
Relay connections are made to a six-terminal
connector labeled RELAY1, RELAY2. The COM
(common) terminals of the relays should not be
confused with the COM (common) terminal of the
signal connector. The 24 VDC output is available at
the connector labeled 24V OUT, next to the relays
connector.
Additional Information
For additional setup and wiring information, please see
the complete details further in this manual.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
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Specifications
Except where noted all specifications apply to operation at +25°C.
General
Display
PD8-154; Four red LED channel/point
indicators.
PD8-158; Eight red LED channel/point
indicators.
One green LED power indicator.
Alarm
Messages
Custom printed adhesive clear labels.
Order Free Custom Message Labels online.
Area:
PD8-154, 1.25" x .60" (32 mm x 15 mm),
4 messages
PD8-158, 1.25" x .25" (32 mm x 6 mm),
8 messages
User specified size and length, up to 4 lines
(PD8-154) or 2 lines (PD8-158) of 14
characters of size 9 fonts.
Audible
Alarm
These annunciators contain an internal
audible alarm that, due to the nature of the
heavy-duty metal enclosure, produces a
very minimal sound.
Programming
Methods
Rear 4-position switch for sequence
selection and audible alarm operation.
Three front panel pushbuttons for NO/NC
input selection, sequence options, and
sequence operation.
Noise Filter
40 ms debounce on inputs (including SIL,
ACK, and RST).
Shared First-
Out Systems
1 ms unit-to-unit delay. Maximum of 200
units in the shared first-out system.
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 12-36 VDC, 12-24 VAC, 6 W max
Fuse
Required external fuse: UL Recognized,
5 A max, slow blow. Up to 6 annunciators
may share one 5 A fuse
Isolated
Power Supply
24 VDC 10% @ 200 mA max
Standard on 85-265 VAC powered units only.
Isolation
4 kV input/output-to-power line.
Overvoltage
Category
Installation Overvoltage Category II:
Local level with smaller transient overvoltages
than Installation Overvoltage Category III
Environmental
T6 Class operating temperature range
Ta = -55 to 60ºC
T5 Class operating temperature range
Ta = -55 to 65ºC
Storage temperature range:
-55 to 85ºC (-67 to 185ºF)
Relative humidity:
0 to 90% non-condensing
Max Power
Dissipation
Maximum power dissipation limited to 15.1 W
Connections
Removable screw terminal blocks for 12 to
22 AWG wire.
Mounting
Wall Mounting:
Four (4) mounting holes provided for
mounting annunciator to wall. See Wall
Mounting Instructions on page 18 for
additional details.
Pipe Mounting:
Optional pipe mounting kit (PDA6848)
allows for pipe mounting. Sold separately.
See Pipe Mounting Instructions on page 19
for additional details.
Tightening
Torque
Power, signal, relays, mA out terminals:
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
Aluminum: 14.7 lbs (6.67 kg)
Stainless Steel: 23.5 lbs (10.66 kg)
Warranty
3 years parts and labor. See Warranty
Information and Terms & Conditions on
www.predig.com for complete details.
Input
Input Types
NO or NC switches: No external
excitation required
Open collector transistor (NPN):
Open circuit voltage approximately
3.3 VDC
Logic Levels: LOW = 0 to 0.9 VDC
HIGH = 2.4 to 28 VDC
Update Rate
41 ms following alarm state;
1 ms for alarm state clear
Sequences
Input follower, ISA Sequences A, F1A,
F2A, F3A, M, F1M, F2M and F3M per
ISA Standard ISA-18.1-1979 R2004.
Sequence
Options
A, F1A, F2A, F3A, M, F1M, F2M, and
input follower with selectable options
-1 (silence pushbutton), -4 (no lock-in),
and -6 (no audible alarm) per
ISA Standard ISA-18.1-1979 R2004.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
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Relays
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 snubber should be connected to each
relay contact switching inductive loads
to prevent disruption to the
microprocessor’s operation.
Recommended snubber value:
0.01 µF/470 , 250 VAC (PDX6901).
Relay
Operation
Relay 1: Alarm state until alarm is
acknowledged.
Relay 2: Alarm state while any channel
indicating alarm condition.
Fail-Safe
Operation
Programmable
Independent for each relay
Note: In fail-safe mode, relay coil is
energized in non-alarm condition.
In case of power failure, relay will go to
alarm state.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
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Enclosure
Material
AL Models:
ASTM A413 LM6 die-cast aluminum,
copper-free, enamel coated
SS Models:
ASTM A743 CF8M investment-cast
316 stainless steel
Gasket
Fluoroelastomer
Rating
NEMA 4X, IP68 Explosion-proof
Color
AL: Blue
SS: Silver
Window
Borosilicate glass
Conduits
Four ¾" NPT threaded conduit
openings
Conduit Stopping
Plugs
Sold separately
Flanges
Two built-in flanges for wall and pipe
mounting.
Tamper-Proof
Seal
Cover may be secured with
tamper-proof seal.
Overall
Dimensions
6.42" x 7.97" x 8.47" (W x H x D)
(163 mm x 202 mm x 215 mm)
Weight
AL: 14.7 lbs (6.67 kg)
SS: 23.5 lbs (10.66 kg)
ATEX
Flameproof protection
II 2GD
Ex db IIC Gb
Ex tb IIIC Db
IP66/IP68
Tamb: -55°C to +85°C
Certificate No.: Sira 19ATEX1252U
IECEx
Flameproof and dust protection
Ex tb IIIC Db
IP66/IP68
Tamb: -55°C to +85°C
Certificate No.: IECEx SIR 19.0075U
CSA
Class I, Division 1, Groups A, B, C, D
Class II, Division 1, Group E, F, G
Class III Ex db IIC Gb Ex tb IIIC Db
Class I, Zone 1, AEx db IIC Gb
Zone 21, AEx tb IIIC Db
IP66/IP68/TYPE 4X
Tamb: -55°C to +85°C
Certificate No.: 80011200
UL
Class I, Division 1, Groups A, B, C, D
Class II, Division 1, Groups E, F, G
Class III
Class I, Zone 1, AEx db IIC Gb
Zone 21, AEx tb IIIC
Ex db IIC Gb
Ex tb IIIC Db
IP66/IP68/TYPE 4X
Tamb: -55°C to +85°C
Certificate Number: E518920
Note: The above approvals are for the enclosure only.
See next column for approvals on the entire
instrument.
General Compliance
Information
Electromagnetic Compatibility
Emissions
EN 55022
Class A ITE emissions requirements
Radiated
Emissions
Class A
AC Mains
Conducted
Emissions
Class A
Immunity
EN 61326-1
Measurement, control, and laboratory
equipment
EN 61000-6-2
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
Product Ratings and Approvals
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 db IICZone 21 Ex tb IIIC T90°C
-55°C < Tamb. < +60° C; Temperature Code T6
-55°C < Tamb. < +65° C; Temperature Code T5
Enclosure Type 4X & IP66 / IP68
Certificate Number: 2531731
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 atmosphere, 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.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
17
EU Declaration of
Conformity
For shipments to the EU and UK, a Declaration of
Conformity was printed and included with the product.
For reference, a Declaration of Conformity is also
available on our website www.predig.com/docs.
Safety Information
•Read complete instructions prior to installation
and operation of the annunciator.
•Risk of electric shock or personal injury.
•Hazardous voltages exist within enclosure.
Installation and service should be performed only
by trained service personnel.
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 Electrical Code CSA 22.1. All
power supplies below 36 V and input circuits
must be derived from a CSA Approved Class 2
source.
•Disconnect from supply before opening
enclosure.
•Keep cover tight while circuits are live.
•Conduit seals must be installed 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 annunciator from box. Inspect the
packaging and contents for damage. Report
damages, if any, to the carrier.
If any part is missing or the annunciator
malfunctions, please contact your supplier or the
factory for assistance.
Cover Jam Screw
The cover jam screw should be properly installed
once the annunciator has been wired and tested in a
safe environment. The cover jam screw is intended to
prevent the removal of the annunciator cover in a
hazardous environment without the use of tools.
Using a M2 hex wrench, turn the screw clockwise until
the screw contacts the annunciator. Turn the screw
an additional 1/4 to 1/2 turn to secure the cover.
•Excess torque may damage the threads, screw
head, and wrench.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
18
Mounting
The ProtEX-MAX has two slotted mounting flanges
that may be used for pipe mounting or wall mounting.
Refer to Figure 2 and Figure 3 below.
•Do not attempt to loosen or remove flange bolts
while the annunciator is in service.
Mounting Dimensions
All units: inches (mm)
Figure 2. Enclosure Dimensions –Front View
Figure 3. Enclosure Dimensions –
Side Cross Section View
Wall Mounting Instructions
The annunciator can be mounted to any wall or flat
surface using the four provided mounting holes
located in the built-in flanges. In addition, the internal
electronic assembly can be rotated to allow the
enclosure to be mounted in any position. To mount
the annunciator to a wall, follow these instructions:
•Prepare a section of wall approximately
7" x 8.5" (178 mm x 216 mm) for annunciator
mounting by marking with a pencil the
mounting holes (shown in Figure 2) on the
wall.
•Select the appropriate mounting screws for the
mounting surface to be used. The mounting
holes diameter is shown on Figure 2.
Note: Mounting screws are not included.
•Using a drill bit slightly smaller than the girth
of the mounting screws, pre-drill holes at the
mounting locations previously marked.
•Insert mounting screws into the four mounting
holes and screw them into the pre-drilled
holes.

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Pipe Mounting Instructions
The annunciator can also be mounted to a pipe using
an optional U-Bolt kit. This kit includes two U-bolts,
the necessary hardware, and is available in zinc
plated steel (PDA6848) and 316 stainless steel
(PDA6848-SS).
To mount the annunciator using a U-Bolt kit, follow
these instructions:
•Orient the groove on the back of the
instrument with the pipe and secure it to the
pipe with the two U-bolts and hardware
provided.
Vertical Pipe Mounting
Horizontal Pipe Mounting

ProtEX-MAX PD8-154 & PD8-158 Explosion-Proof Annunciators
Instruction Manual
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Connections
All connections are made to removable screw
terminal connectors located at the rear of the
annunciator.
•Use copper wire with 60°C or 60/75°C insulation
for all line voltage connections. Observe all safety
regulations. Electrical wiring should be performed
in accordance with all applicable national, state,
and local codes to prevent damage to the
annunciator and ensure personnel safety.
•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
annunciator and ensure personnel safety.
•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 presenton any lead or terminal.
•Follow all fusing and wiring precautions
requirements for the instrument integrated to the
PD8 Series model number being connected.
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
electronics module.
Some connectors may be provided already
connected. These connections are required for proper
operation 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 Connections on AC-Powered
Models
ProtEX-MAX units with Vigilante II integratedfunctionality
have two factory wired connectors. Four wires connect
the remote switch inputs ofthe annunciator. Two wires
connect the DC power supply on the main annunciator
electronics to the ProtEX-MAX connector board. These
must remain connected as shown for the SafeTouch
Buttons to function on these models.
Figure 4. Integrated Vigilante II Required
Connections for AC-Powered Units
Required Connections on DC-Powered
Models
Low voltage PD8-154-7R2-0 and PD8-158-7R2-0
models require low voltage power to be supplied to the
power supply connector on the ProtEX-MAX
connector board as well as to the integrated Vigilante
II connections as described in the Vigilante II
Instruction Manual. In addition, four wires connect the
remote switch inputs of the annunciator to the
ProtEX-MAX connector board. These wires must
remain connected for the SafeTouch buttons to
function.
Figure 5. Integrated Vigilante II Required
Connections for DC-Powered Units