Siemens Maxum II User manual

Maxum Edition II
PD PA AP
Installation Manual
Installation Manual
General guidelines for receiving, unpacking, and
installing the Maxum Edition II gas chromatograph.
General initial startup procedures are given. Actual
practice is application dependent.
12/2019
2000595 Rev 1
Installation Overview 1
Safety notes 2
Installation Steps 3
Initial Startup Procedures 4
Appendix A - PECM LED
Interpretation A
Appendix B - Change Log B

Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property
damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified
personnel are those who, based on their training and experience, are capable of identifying risks and avoiding
potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended or
approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this
publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Siemens AG
Division Process Industries and Drives
Postfach 48 48
90026 NÜRNBERG
GERMANY
2000595 Rev 1
Ⓟ 12/2019 Subject to change
Copyright © Siemens AG 2012 - 2019.
All rights reserved

Table of contents
1 Installation Overview ....................................................................................................................................7
2 Safety notes..................................................................................................................................................9
2.1 Read the Safety Manual First...................................................................................................9
2.2 Analyzer Environment ..............................................................................................................9
2.3 Hazardous Gasses.................................................................................................................10
2.4 Location..................................................................................................................................10
2.5 Security information ...............................................................................................................11
2.6 Approved Use ........................................................................................................................12
2.7 Qualified Personnel................................................................................................................12
3 Installation Steps ........................................................................................................................................13
3.1 Custom Application Drawing Package ...................................................................................13
3.2 Considerations for Pulsed Discharge Detector Installation ....................................................13
3.3 Receiving a Crated Analyzer..................................................................................................14
3.4 Mounting the Analyzer ...........................................................................................................16
3.4.1 Pre-installation Requirements ................................................................................................17
3.4.2 Wall Mounting Units ...............................................................................................................17
3.4.3 Mounting and Powering an Air Treater ..................................................................................18
3.5 Cable Connections.................................................................................................................19
3.5.1 Protective Earth Ground.........................................................................................................20
3.5.2 Cable Connection Using Steel Conduit System.....................................................................20
3.5.3 Power Connections ................................................................................................................21
3.5.3.1 Air Bath or Airless AC Input and Fuses..................................................................................22
3.5.3.2 Modular Oven Model Power Connections..............................................................................23
3.5.3.3 Customer Supplied Components ...........................................................................................25
3.5.3.4 Installing AC Power................................................................................................................25
3.5.4 Signal Cables .........................................................................................................................26
3.5.5 Automatic Purge Unit .............................................................................................................27
3.6 Utility Gas Supply Installation.................................................................................................28
3.6.1 Air Supply...............................................................................................................................28
3.6.1.1 Minimum Air Pressure............................................................................................................28
3.6.1.2 FID Air Supply ........................................................................................................................29
3.6.2 Calibration Standard Supply ..................................................................................................29
3.6.3 Detector Flame Fuel Supply...................................................................................................29
3.6.4 Carrier Supply ........................................................................................................................30
3.6.5 Heat Tracing...........................................................................................................................31
3.7 Sampling System Installation .................................................................................................31
3.7.1 Heat Tracing...........................................................................................................................33
3.7.2 Sample Wetted Parts .............................................................................................................33
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3.7.3 Returning Samples to the Process Stream ............................................................................33
3.8 Final Analyzer Connections ...................................................................................................34
3.8.1 IO Wiring ................................................................................................................................35
3.8.2 Tubing Connections ...............................................................................................................35
4 Initial Startup Procedures ...........................................................................................................................37
4.1 Inspect the Electronics Cabinet..............................................................................................37
4.2 Preparing and Inspecting the Oven........................................................................................38
4.3 Establish Utility Gas Flows.....................................................................................................40
4.4 Enable Power to the Maxum II ...............................................................................................40
4.5 Leak Check the Column Oven Connections ..........................................................................40
4.6 Check Operation of Oven Heaters .........................................................................................41
4.7 Check Flows and Pressures at Operating Temperature ........................................................42
4.8 Prepare Flame Detectors if Present.......................................................................................43
4.9 Establish Sample Flow to the Maxum II .................................................................................43
4.10 Establish Communications with GCP.....................................................................................44
4.11 Run Chromatograms and Make Method Adjustments if Necessary ......................................45
4.12 Calibrate the Maxum II ...........................................................................................................45
4.13 Run the Maxum II on Process Fluid .......................................................................................47
4.14 Check for Proper Reporting of Results ..................................................................................47
A Appendix A - PECM LED Interpretation .....................................................................................................49
B Appendix B - Change Log ..........................................................................................................................51
B.1 December 2019 Changes ......................................................................................................51
Tables
Table 3-1 Regulator Assemblies .................................................................................................................30
Figures
Figure 2-1 Typical analyzer shelter.................................................................................................................9
Figure 3-1 Crated analyzer...........................................................................................................................14
Figure 3-2 Uncrating Details.........................................................................................................................15
Figure 3-3 Using a lift to install an analyzer..................................................................................................16
Figure 3-4 Example Maxum II outline drawing (Air-bath or Airless Oven on left and Modular Oven on
right) ............................................................................................................................................18
Figure 3-5 Simplified cable connection diagram - no APU ...........................................................................19
Figure 3-6 Simplified cable connection diagram - with APU.........................................................................19
Figure 3-7 Protective earth ground symbol...................................................................................................20
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Figure 3-8 PECM AC Power Distribution......................................................................................................22
Figure 3-9 MMO 24VDC Power Entry Connection .......................................................................................24
Figure 3-10 MMO AC Power Entry Connection..............................................................................................24
Figure 3-11 Power entry plate ........................................................................................................................25
Figure 3-12 APU signal disconnector units.....................................................................................................27
Figure 3-13 Automatically-switched carrier-gas cylinders ..............................................................................30
Figure 3-14 Typical Installed Sample Probe...................................................................................................32
Figure 4-1 Typical Airless oven packaging...................................................................................................39
Figure 4-2 Removing inner covers, Modular oven........................................................................................39
Figure 4-3 Analytical module removed from oven ........................................................................................39
Figure 4-4 PECM Overtemperature Test Switches ......................................................................................41
Figure 4-5 Peak Screen - Calibration ...........................................................................................................46
Figure 4-6 Changing Calibration Level Settings ...........................................................................................47
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Table of contents
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Installation Overview 1
This section is intended for installation personnel. After completing these procedures, the
Maxum II will be ready for startup. To ensure a safe and trouble-free installation, follow all
instructions and associated advisories. The Maxum II has special instructions in the custom
documentation and on tags placed on the unit. These must be followed as well to ensure safe
operation of the Maxum II.
CAUTION
Ensure that all AC Power (Mains) specification requirements and advisories are met. Failure
to do so, and operating the equipment in a manner not specified, may impair the safety
protection provided by the equipment. Be sure to review the information provided in the Safety
notes (Page 9) section of this manual.
WARNING
Specific additional instructions are provided with tags placed on the Maxum II and in the
custom application drawing package noted below. Installation should include all of the items
noted in both of these as well as the manuals. The tagging and custom application drawing
packages are unique to the particular Maxum II.
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Installation Overview
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Safety notes 2
2.1 Read the Safety Manual First
The Maxum II Explosion Protection Safety Standards Manual (https://
support.industry.siemens.com/cs/document/42017542/) in multiple languages is shipped on a
CD with each new analyzer. Read and become familiar with this manual before attempting to
install the analyzer.
2.2 Analyzer Environment
To protect the Maxum II from the elements, it should be located in an analyzer house or a similar
protected enclosure; see Figure 1-1. The air temperature around the analyzer should be
maintained between 0°F (-18°C) and 122°F (50°C). An installation drawing package will be
sent out early in the project to document the application specific information for each Maxum II
needed for site preparation. Final documentation will be shipped with the unit.
Figure 2-1 Typical analyzer shelter
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2.3 Hazardous Gasses
When hazardous gases (such as poisonous, flammable, or oxygen depleting) are potentially
present in or around the Maxum II area, all national and international safety requirements must
be fulfilled to protect personnel and the environment against hazards that could arise. All
process conditions (such as normal, backup, and upset) must be considered in the
determination for potential hazardous gas presence.
Scheduled preventive maintenance and inspection for leaks should be performed by the
customer. Minimize leak sources by external venting of the oven exhaust and analyzer vents.
This reduces but does not eliminate the sources for leaks, so personnel protection is a
requirement whenever hazardous/poisonous gases may be present. Disregarding this warning
could result in serious injury or death and damage to equipment.
2.4 Location
Each Maxum II is manufactured and tagged for a specific hazardous area classification. Each
unit must be installed in an area that is suitable for this area classification.
WARNING
T-Rating
Each unit is tagged with a T-rating which quantifies the maximum surface temperature that
may occur in the instrument. The user must ensure that no combustible gas concentrations
will be present, whether on a continual or occasional basis, which has an ignition temperature
below the T-rating of the unit.
The analyzer house should be located as close as possible to where the sample is to be
obtained to minimize the sample transit time. It is preferable that this distance be less than 30
m (100 feet).
The analyzer house must be large enough to allow ample access for installing, operating, and
maintaining the analyzer. The concrete slab for the analyzer house should be large enough to
accommodate gas cylinders located on the outside. Make sure to secure the cylinders using a
cylinder rack or chain guard.
Space inside for the analyzer must be at least 229 cm high by 127 cm wide by 102 cm deep (90”
high by 50” wide by 40” deep). The height may be somewhat less if there is no sampling system
cabinet or panel beneath the analyzer, or if the analyzer is a Maxum II Modular Oven. See the
Maxum II Outline Drawings in Maxum II Official Product Specifications (https://
support.industry.siemens.com/cs/document/109742522/).
Safety notes
2.4 Location
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When the Maxum II contains an air bath oven, it will vent in excess of 85 liters per minute (3
SCFM) of heated air through the oven exhaust. See note below for the recommended
approach.
WARNING
Oven Venting
All vent lines and oven exhaust should be vented outside the shelter. The vents should be
connected to a location where the pressure is atmospheric. Connection of oven or analyzer
vents to a variable pressure source such as a flare header should not be done, as
chromatographic performance will be severely affected. Backpressure on oven vent could
cause the T-rating of the instrument to be exceeded, which might become an ignition source.
In addition, in some situations it may be possible for backpressure on oven vents to force
hazardous gases into the shelter. Refer to the comments on Hazardous gases previously
described.
Installation of the unit with a combustible gas coming into the EPC requires that a restriction be
placed on the flow into the Maxum II. This is required to limit the flow of the combustible gas into
the unit. The recommendation is to limit the flow prior to entry into the shelter.
WARNING
Flow Restriction
The Maxum II will be tagged for flow restriction of combustible gases into the Electronic
Pressure Controller. The user/installer must ensure that this flow restriction is implemented to
permit safe operation of the unit.
2.5 Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected
to an enterprise network or the internet if and to the extent such a connection is necessary and
only when appropriate security measures (e.g. firewalls and/or network segmentation) are in
place.
For additional information on industrial security measures that may be implemented, please
visit (https://www.siemens.com/industrialsecurity).
Siemens' products and solutions undergo continuous development to make them more secure.
Siemens strongly recommends that product updates are applied as soon as they are available
and that the latest product versions are used. Use of product versions that are no longer
supported, and failure to apply the latest updates may increase customers' exposure to cyber
threats.
Safety notes
2.5 Security information
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To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed visit (https://www.siemens.com/industrialsecurity).
2.6 Approved Use
The Maxum edition II gas chromatograph is primarily used in all branches of the fine chemicals,
refining, and hydrocarbon processing industries. It performs chemical composition analysis of
gases and liquids that are present in all phases of production. The application flexibility of the
Maxum II allows it to analyze a wide variety of samples including feedstock, partially processed
streams, final products, and process byproducts including wastes and environmental hazards.
The Maxum II product is intended to be used only in conjunction with other devices and
components which have been recommended and approved by Siemens. Appropriate safety
standards were used in the development, manufacture, testing, and documentation of the
Maxum II. Under normal operation, this product is safe for use providing that all safety and
handling guidelines are observed with respect to configuration, assembly, approved use, and
maintenance.
This device has been designed with safe isolation between high and low voltage circuits. Low
voltages which are connected must also be generated using safe isolation. If any part of the
Maxum II is opened, certain parts of the device are accessible which may carry dangerous
voltages. Therefore, only suitably qualified personnel may work on this device as indicated in
the next section which is titled "Qualified Personnel".
2.7 Qualified Personnel
Only suitably qualified personnel may operate or perform maintenance on the Maxum II. For the
purposes of safety, qualified personnel are defined as follows:
● Those who have been appropriately trained for the tasks which they are performing (for
example, commissioning, maintenance, or operation).
● Those who have been appropriately trained in the operation of the Maxum II process gas
chromatograph and are sufficiently acquainted with Maxum II documentation.
● Those who are familiar with the safety concepts of the Maxum II process gas
chromatograph and are sufficiently acquainted with Maxum II documentation.
● Those who are authorized to energize, ground, and tag circuits and devices in accordance
with established safety practices may perform those tasks for which they are trained.
WARNING
Avoid injury and property damage
Operation or Maintenance of the Maxum II by unqualified personnel or failure to observe the
warnings in this manual or on the device may lead to severe personal injury and/or extensive
property damage.
Safety notes
2.7 Qualified Personnel
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Installation Steps 3
3.1 Custom Application Drawing Package
Included with your analyzer is a custom application drawing package that provides drawings
and information pertinent only to your analyzer. You should have this package readily available
during installation.
Typical drawings may include:
● System Block and Utility Requirements
● System Outline and Dimensional Drawings
● Sampling System – Plumbing and Spare Parts List
● Sampling System Dimensional Diagram
● Sampling Probe
● Electronic Controller – Internal Layout
● Applicable Wiring Diagrams
● Oven Plumbing Diagram – Sensor Near Electronics
● Recommended Spare Parts - Analyzer
● Manufacturing Test Charts
● Stream Composition Data
3.2 Considerations for Pulsed Discharge Detector Installation
Special installation considerations may be required for installation, power, gas supply, wiring,
etc. in association with the Valco Pulsed Discharge Detector. If your Maxum II is equipped with
this type of detector, see the custom documentation provided with the Maxum II and the
Instruction Manual for the Pulsed Discharge Detector that is available from Valco Instruments
Co. Inc.
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3.3 Receiving a Crated Analyzer
Figure 3-1 Crated analyzer
When the Maxum II is shipped to the installation site in a reinforced crate with vibration
protection, it will be clearly labeled for horizontal placement and handling.
● On receipt of the unit, look for any visible damage and verify that all items noted to be
shipped were received. Record on the receipt any damage or missing items noting the
item(s) and quantity missing on all copies. If anything is damaged or missing, then also
notify your Siemens representative or authorized agent of the damage to the equipment.
CAUTION
Protect from weather
If the unit is to be stored, it should be protected from the weather (the crate does not provide
weather protection.) If left outside in the weather, severe damage to the unit may occur. If the
unit is to be shipped to another location, preserve the vibration isolation provided in the original
shipping crate, or address the vibration isolation in the shipment method.
Note
Use proper lifting methods and equipment
A crated Maxum II will weigh a minimum of 200 pounds (90 kg), and can weigh substantially
more depending upon the configuration. Use a forklift or other suitable load-handling
equipment until it is uncrated.
● Place the crate on the floor horizontally with the orientation label THIS SIDE UP pointed up.
● Remove the metal bands from around the crate.
● Unscrew the cover and remove the crate cover. Remove the crate sides to facilitate removal
of the unit. Remove the wooden 2x4 supports and foam blocks from the top of the analyzer.
The analyzer will be covered in a plastic sheet.
● The Maxum II is bolted to a plywood sheet that 'floats' on a foam shock-absorbing pad. The
plywood can optionally be left on the analyzer to aid in handling during mounting.
Installation Steps
3.3 Receiving a Crated Analyzer
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Figure 3-2 Uncrating Details
CAUTION
Do not use protruding equipment as lifting handles.
The Maxum II must be lifted only by the mounting brackets on the back. Never allow the
analyzer to be supported on its side or front. Lifting by applying force on any of the equipment
protruding from the analyzer will damage the equipment.
● Remove the Maxum II from the shipping crate.
● Remove the plastic bag and drying agent from around the analyzer.
● Examine the Maxum II for visible damage. Notify the carrier of the damage and file the
necessary claims. Also notify your Siemens representative or authorized agent of the
damage to the equipment.
● The analyzer is likely to be shipped with packing material to help stabilize interior
components. Remove any packing material from inside the device enclosures.
Installation Steps
3.3 Receiving a Crated Analyzer
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3.4 Mounting the Analyzer
The following procedures should be used to mount the Maxum II to wall or bulkhead. See the
illustration, Figure 3-4 Example Maxum II outline drawing (Air-bath or Airless Oven on left and
Modular Oven on right) (Page 18).
CAUTION
Use safe handling techniques for heavy objects
Prior to wall mounting and without the sampling system, the Maxum II will weigh a minimum
of 150 pounds (68 kg) and can weigh substantially more depending on the configuration. To
mount the Maxum II to the wall, use a mechanical lift or the number of people specified in the
user’s policy on lifting and installing. Failure to use care in this area can result in personal injury
and equipment damage.
CAUTION
Use only designated lifting points
The Maxum II should be lifted only by the mounting brackets on the back or supported from the
bottom (be sure to protect any bottom connections). Never allow the analyzer to be supported
on its side or front. It can be moved in either the horizontal or vertical position. Failure to follow
this practice may result in equipment damage.
Figure 3-3 Using a lift to install an analyzer
See also
Wall Mounting Units (Page 17)
Installation Steps
3.4 Mounting the Analyzer
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3.4.1 Pre-installation Requirements
Before installing the Maxum II to the wall, verify that the following requirements are met:
● Determine the suitable height from the floor to allow easy access to front and internal
components.
● Locate the Maxum II in a position that allows easy access to primary power wiring, I/O,
stainless steel tubing connections, carrier gas and compressed air supplies, and connection
of any peripheral devices within the house or shelter.
● The Maxum II does not have a power switch. Install a circuit breaker near the unit (or power
switch with a fuse). For the air bath or airless oven configuration, a minimum rating of 20A
is required for 115V and 16A for 230V. For modular oven configuration, the maximum
current for circuit planning purposes is 5.7A at 115V or 2.3A at 230V (or refer to the
specifications at the beginning of this manual for optional DC requirements). Refer to the
Application Drawing Package for specific information on the utility requirements.
3.4.2 Wall Mounting Units
Observe the following minimum specifications when wall-mounting the Maxum II.
Left side clearance: 460 mm (18") from wall or other equipment
Right side clearance: 460 mm (18") in all cases
Front side clearance: 654 mm (25¾”) in all cases
Center to center: 1120 mm (44”) in all cases
See the Application Drawing Package, Dimension Diagram Analyzer sheet for drilling
information. As shown in the example pattern below, drill 12 mounting holes in the shelter (16
if sample system is attached to Maxum II). If using an M6 bolt, use a 5.10 mm (.201 inch) drill
bit. If using ¼ x 20 bolts, use a No. 7 (.201) drill bit. If using ¼ x 28 bolts, use a No. 3 (.213) drill
bit. Be certain mounting height is convenient for the user.
Installation Steps
3.4 Mounting the Analyzer
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Figure 3-4 Example Maxum II outline drawing (Air-bath or Airless Oven on left and Modular Oven on
right)
● With a mechanical lift such as the unit shown in Figure 3-3 Using a lift to install an analyzer
(Page 16) or adequate personnel, lift and align Maxum II mounting holes with those of the
house or shelter wall pre-drilled mounting holes.
● Insert the 12 or 16 bolts through Maxum II mounting brackets and into mounting wall stud
pre-drilled holes. Before tightening mounting bolts, be certain unit is leveled both
horizontally and vertically. Securely tighten all bolts to be certain the Maxum II is securely
mounted to the wall.
See also
Mounting the Analyzer (Page 16)
3.4.3 Mounting and Powering an Air Treater
The Air Treater is a catalytic device designed to remove hydrocarbons from ordinary plant
instrument air. Analyzers that include an FID will typically be equipped with an Air Treater, used
as a means to supply clean air to the detector. The Air Treater is an independent unit with its
own mounting and power. Mount the Air Treater in a convenient location near the Maxum II. The
mounting bracket requires four ¼” (6.35 mm) diameter bolts. Power the Air Treater per local
electrical codes, referring to the custom documentation package and the Maxum II Explosion
Protection Safety Standards Manual (A5E02220442001) for additional information.
Installation Steps
3.4 Mounting the Analyzer
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3.5 Cable Connections
The simplified diagram below shows power and signal wiring into the analyzer. Conduit may or
may not be required to meet local codes and safety rules.
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Figure 3-5 Simplified cable connection diagram - no APU
When an Automatic Purge Unit (APU) is used, described in detail in Maxum II Explosion
Protection Safety Standards Manual (https://support.industry.siemens.com/cs/document/
42017542/), both power and signal wiring enter the analyzer through separate disconnect
relays that are controlled by the APU.
$&OLQHPDLQV6LJQDOZLUHV(OHFWURQLFVFDELQHW,QWHUQDOWHUPLQDOEORFNV&DEOHJODQGRUFRQGXLWILWLQJ,QWHUQDOWHUPLQDOEORFNV3RZHUFRQGXLW3RZHUFLUFXLWEUHDNHU6LJQDOFRQGXLW&DEOHJODQGRUFRQGXLWILWLQJ3URWHFWLYHHDUWKJURXQG$383RZHUGLVFRQQHFWUHOD\6LJQDOGLVFRQQHFWUHOD\
Figure 3-6 Simplified cable connection diagram - with APU
Installation Steps
3.5 Cable Connections
Installation Manual
Installation Manual, 12/2019, 2000595 Rev 1 19

3.5.1 Protective Earth Ground
Install the protective earth ground per applicable codes, including applicable standards for
Intrinsic Safety ground. See the illustration, Figure 3-4 Example Maxum II outline drawing (Air-
bath or Airless Oven on left and Modular Oven on right) (Page 18) for connection locations.
Grounding locations are located on the back and top of the Maxum II Airbath or Airless Oven
or right side and top of the Maxum II Modular Oven. The ground is secured with a M5 x 10
socket head screw (uses M4 hex). Although there are multiple possible connection points, only
one externally connected ground is used.
Figure 3-7 Protective earth ground symbol
Note
Protective Earth (PE) Grounds
In addition to the Protective Earth (PE) Grounds described above, there are additional PE
Ground connection points inside the Electronics Cabinet (EC). For the air bath or airless oven
configuration one is on the floor of the EC next to the PECM and four more located on the left
side wall of the EC just above the PECM. For the modular oven configuration there is one on
the floor of the EC on the front left side of the device and two more on the left side wall near the
front. These connections are marked with the same ground symbol as the external PE
connections. These PE connections may be used when it becomes necessary to connect
internal hardware to PE Ground (for example, if an Automatic Purge Unit is used). Local
electrical code rules regarding grounding connections must be followed.
CAUTION
Verify grounding paths
Ensure that a ground wire or protective conductor from the external protective earthing system
is connected to a ground lug or protective conductor terminal before connecting to mains
power. See the drawing and note above for location of the PE lug.
See also
Wall Mounting Units (Page 17)
3.5.2 Cable Connection Using Steel Conduit System
Using flexible conduit and/or armored cable is equivalent to using “steel conduit.”
● The power wiring and the Ethernet wiring can be regular unshielded lines. The power wiring
and signal wiring must be routed in separate conduit.
● All DO lines with inductive loads must have transient suppression at the inductive load.
● Flexible conduit or armored cable must have its flexible conduit and/or armoring conductivity
360-degree terminated at its entry to the Maxum II enclosure (or bulkhead.).
Installation Steps
3.5 Cable Connections
Installation Manual
20 Installation Manual, 12/2019, 2000595 Rev 1