Siemens SIMATIC NET RUGGEDCOM RSG2200F User manual

Edition 01/2020
Installation Manual
SIMATIC NET
Rugged Ethernet Switches
RUGGEDCOM RSG2200F
https://www.siemens.com

SIMATIC NET
Rugged Ethernet Switches
RUGGEDCOM RSG2200F
Installation Manual
Preface
Introduction 1
Installing the Device 2
Device Management 3
Communication Ports 4
Technical Specifications 5
Certification 6
01/2020
C79000-G8976-1346-06

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 be-
low 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 relat-
ing 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 in-
structions. Qualified personnel are those who, based on their training and experience, are capable of identify-
ing 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 recommend-
ed 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 permis-
sible ambient conditions must be complied with. The information in the relevant documentation must be ob-
served.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publica-
tion may be trademarks whose use by third parties for their own purposes could violate the rights of the own-
er.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software de-
scribed. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the in-
formation in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Digital Industry
Process Automation
Postfach 48 48
90026 NÜRNBERG
GERMANY
© 01/2020 Subject to Change Copyright © Siemens 2020
All rights reserved

Table of Contents
Preface ............................................................................................................................................ v
Related Documents ................................................................................................................. v
Accessing Documentation ....................................................................................................... v
Training ................................................................................................................................... v
Customer Support .................................................................................................................. vi
Contacting Siemens ................................................................................................................ vi
1 Introduction ........................................................................................................................... 1
1.1 Feature Highlights ................................................................................................. 1
1.2 Description ............................................................................................................ 2
1.3 Required Tools and Materials ................................................................................. 3
1.4 Decommissioning and Disposal ............................................................................. 3
1.5 Cabling Recommendations .................................................................................... 4
1.5.1 Protection On Twisted-Pair Data Ports .................................................................... 4
1.5.2 Gigabit Ethernet 1000Base-TX Cabling Recommendations ...................................... 4
1.5.3 Supported Fiber Optic Cables ................................................................................ 5
1.6 Tamper-Evident Security Seals ............................................................................... 5
2 Installing the Device ............................................................................................................. 7
2.1 General Procedure ................................................................................................. 7
2.2 Unpacking the Device ........................................................................................... 8
2.3 Mounting the Device ............................................................................................. 8
2.3.1 Mounting the Device to a Rack .............................................................................. 9
2.3.2 Mounting the Device on a DIN Rail ...................................................................... 10
2.3.3 Mounting the Device to a Panel .......................................................................... 11
2.4 Connecting the Failsafe Alarm Relay .................................................................... 12
2.5 Connecting Power ............................................................................................... 13
2.5.1 Connecting AC or DC Power ................................................................................ 14
2.5.2 Wiring Examples .................................................................................................. 16
3 Device Management ........................................................................................................... 21
3.1 Connecting to the Device .................................................................................... 21
3.2 Configuring the Device ........................................................................................ 22
4 Communication Ports .......................................................................................................... 23
4.1 Copper Ethernet Ports ......................................................................................... 24
4.2 Fiber Optic Ethernet Ports ................................................................................... 25
4.3 SFP Transceivers .................................................................................................. 26
4.4 GBIC Optic Ethernet Ports .................................................................................... 27
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Table of Contents
4.4.1 Installing a GBIC Optical Port ............................................................................... 27
4.4.2 Removing a GBIC Optical Port .............................................................................. 29
5 Technical Specifications ...................................................................................................... 31
5.1 Power Supply Specifications ................................................................................ 31
5.2 Failsafe Relay Specifications ................................................................................ 31
5.3 Supported Networking Standards ........................................................................ 31
5.4 Copper Ethernet Port Specifications ..................................................................... 32
5.5 Fiber Optic Ethernet Port Specifications ............................................................... 33
5.6 Operating Environment ....................................................................................... 34
5.7 Mechanical Specifications .................................................................................... 34
5.8 Dimension Drawings ........................................................................................... 35
6 Certification ......................................................................................................................... 39
6.1 Approvals ............................................................................................................ 39
6.1.1 CSA ..................................................................................................................... 39
6.1.2 European Union (EU) .......................................................................................... 39
6.1.3 FCC ..................................................................................................................... 40
6.1.4 FDA/CDRH ........................................................................................................... 40
6.1.5 ISED .................................................................................................................... 40
6.1.6 ISO ...................................................................................................................... 41
6.1.7 RoHS ................................................................................................................... 41
6.1.8 Other Approvals .................................................................................................. 41
6.2 EMC and Environmental Type Tests ..................................................................... 41
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Preface
This guide describes the RUGGEDCOM RSG2200F. It describes the major features of
the device, installation, commissioning and important technical specifications.
It is intended for use by network technical support personnel who are responsible
for the installation, commissioning and maintenance of the device. It is also recom-
mended for use by network and system planners, system programmers, and line
technicians.
Related Documents
Other documents that may be of interest include:
•RUGGEDCOM RSG2200F User Guide [https://support.industry.siemens.com/cs/-
ww/en/view/109757148]
Accessing Documentation
The latest user documentation for RUGGEDCOM RSG2200F is available online at
https://www.siemens.comhttps://support.industry.siemens.com . To request or in-
quire about a user document, contact Siemens Customer Support.
Training
Siemens offers a wide range of educational services ranging from in-house training
of standard courses on networking, Ethernet switches and routers, to on-site cus-
tomized courses tailored to the customer's needs, experience and application.
Siemens' Educational Services team thrives on providing our customers with the es-
sential practical skills to make sure users have the right knowledge and expertise to
understand the various technologies associated with critical communications net-
work infrastructure technologies.
Siemens ' unique mix of IT/Telecommunications expertise combined with domain
knowledge in the utility, transportation and industrial markets, allows Siemens to
provide training specific to the customer's application.
For more information about training services and course availability, visit or contact a
Siemens Sales representative.
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Preface
Customer Support
Customer Support
Customer support is available 24 hours, 7 days a week for all Siemens customers.
For technical support or general information, contact Siemens Customer Support
through any of the following methods:
Online
Visit http://www.siemens.com/automation/support-request to submit a
Support Request (SR) or check on the status of an existing SR.
Telephone
Call a local hotline center to submit a Support Request (SR). To locate a lo-
cal hotline center, visit https://w3.siemens.com/aspa_app/?lang=en.
Mobile App
Install the Industry Online Support app by Siemens AG on any Android,
Apple iOS or Windows mobile device and be able to:
• Access Siemens' extensive library of support documentation, includ-
ing FAQs and manuals
• Submit SRs or check on the status of an existing SR
• Contact a local Siemens representative from Sales, Technical Support,
Training, etc.
• Ask questions or share knowledge with fellow Siemens customers
and the support community
Contacting Siemens
Address Siemens AG
Industry Sector
300 Applewood Crescent
Concord, Ontario
Canada, L4K 5C7
Telephone Toll-free: 1 888 264 0006
Tel: [phone]
Fax: [phone]
E-Mail [email protected]
Web
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Introduction 1
The RUGGEDCOM RSG2200F is a rugged, fully managed, modular Ethernet switch
specifically designed to operate reliably in electrically harsh and climatically de-
manding utility substation, railway and industrial environments. The RUGGEDCOM
RSG2200F’s superior rugged hardware design coupled with the embedded Rugged
Operating System (ROS) provides improved system reliability and advanced cyber
security and networking features, making it ideally suited for creating Ethernet net-
works for mission-critical, real-time, control applications.
1.1 Feature Highlights
Ethernet Ports
• Up to 9 x Gigabit Ethernet ports (copper and fiber)
• Up to 9 x 100Base-FX Fiber Fast Ethernet ports
• 2-port modules for tremendous flexibility
• Non-blocking, store and forward switching
• Supports many types of fiber (multimode, single mode, bidirectional single
strand)
• Full compliance with IEEE: 802.3, 802.3u & 802.3z
• Full duplex operation and flow control (IEEE 802.3x)
• Long haul optics allow Gigabit at distances up to 70 km
• Industry standard fiber optic connectors: LC, SC, SFP, GBIC
Rated for Reliability in Harsh Environments
• Immunity to EMI and heavy electrical surges
• Zero-Packet-Loss™ technology
• -40 to 85 °C (-40 to 185 °F) operating temperature (no fans)
• Conformal coated printed circuit boards (optional)
• 18 AWG galvanized steel enclosure
Universal Power Supply Options
• Fully integrated, dual-redundant (optional) power supplies
• Universal high-voltage range: 88-300 VDC or 85-264 VAC
• Popular low voltage ranges: 24 VDC (10-36 VDC), 48 VDC (36-72 VDC)
• Screw or pluggable terminal blocks for reliable, maintenance-free connections
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Introduction
1.2Description
• CSA/UL 60950-1 safety approved to 85 °C (185 °F)
1.2 Description
The RUGGEDCOM RSG2200F features various ports, controls and indicator LEDs on
the display panel for connecting, configuring and troubleshooting the device. The
display panel can be located on the rear, front or top of the device, depending on the
mounting configuration.
3
4
2
1
5
7
6
1 Fiber or Copper Ethernet Ports
2 Port Status Indicator LEDs
3 Mode Button
4 RS-232 Serial Console Port (RJ45)
5 Display Mode Indicator LEDs
6 Alarm Indicator LED
7 Power Module Indicator LEDs
Figure1.1 RUGGEDCOM RSG2200F
Communication Ports Ports for communicating with other devices or accessing the
RUGGEDCOM RUGGEDCOM RSG2200F operating system are de-
scribed in "Communication Ports (Page 23)".
Port Status Indicator LEDs Port status indicator LEDs indicate the operational status of each
port, dependent on the currently selected mode.
Mode Color/State Description
Green (Solid) Link detected
Green (Blinking) Link activity
Status
Off No link detected
Green Full duplex mode
Orange Half duplex mode
Duplex
Off No link detected
Green (Solid) 100 Mbps
Green (Blinking) 1000 Mbps
Orange (Solid) 10 Mbps
Speed
Off No link detected
Display Mode Indicator LEDs The display mode indicator LEDs indicate the current display mode
for the port status indicator LEDs (i.e. Status, Duplex or Speed).
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Introduction
1.3Required Tools and Materials
Mode Button The Mode button sets the display mode for the port status indicator
LEDs (i.e. Status, Duplex or Speed). It can also be used to reset the
device if held for 5 seconds.
Alarm Indicator LED The alarm indicator LED illuminates when an alarm condition exists.
Power Module Indicator LEDs The power module indicator LEDs indicate the status of the power
modules.
•Green – The power supply is supplying power
•Red – Power supply failure
•Off – No power supply is installed
RS-232 Console Port The serial console port is for interfacing directly with the device and
accessing initial management functions. For information about con-
necting to the device via the serial console port, refer to "Connect-
ing to the Device (Page 21)".
1.3 Required Tools and Materials
The following tools and materials are required to install the RUGGEDCOM RSG2200F:
Tools/Materials Purpose
AC power cord (16 AWG) For connecting power to the device.
CAT-5 Ethernet cables For connecting the device to the network.
Flathead screwdriver For mounting the device to a DIN rail.
Phillips screwdriver For mounting the device to a panel.
4 x #8-32 screws For mounting the device to a panel.
1.4 Decommissioning and Disposal
Proper decommissioning and disposal of this device is important to prevent malicious
users from obtaining proprietary information and to protect the environment.
Decommissioning
This device may include sensitive, proprietary data. Before taking the device out of
service, either permanently or for maintenance by a third-party, make sure it has
been fully decommissioned.
For more information, refer to the associated Configuration Manual.
Recycling and Disposal
For environmentally friendly recycling and disposal of this device and related acces-
sories, contact a facility certified to dispose of waste electrical and electronic equip-
ment. Recycling and disposal must be done in accordance with local regulations.
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Introduction
1.5Cabling Recommendations
1.5 Cabling Recommendations
Before connecting the device, be aware of the recommendations and considerations
outlined in this section.
1.5.1 Protection On Twisted-Pair Data Ports
All copper Ethernet ports on RUGGEDCOM products include transient suppression
circuitry to protect against damage from electrical transients and conform with IEC
61850-3 and IEEE 1613 Class 1 standards. This means that during a transient electri-
cal event, communications errors or interruptions may occur, but recovery is auto-
matic.
Siemens also does not recommend using copper Ethernet ports to interface with de-
vices in the field across distances that could produce high levels of ground potential
rise (i.e. greater than 2500 V), during line-to-ground fault conditions.
1.5.2 Gigabit Ethernet 1000Base-TX Cabling Recommendations
The IEEE 802.3ab Gigabit Ethernet standard defines 1000 Mbit/s Ethernet commu-
nications over distances of up to 100 m (328 ft) using all 4 pairs in category 5 (or
higher) balanced, unshielded twisted-pair cabling. For wiring guidelines, system de-
signers and integrators should refer to the Telecommunications Industry Association
(TIA) TIA/EIA-568-A wiring standard that characterizes minimum cabling performance
specifications required for proper Gigabit Ethernet operation. For reliable, error-free
data communication, new and pre-existing communication paths should be verified
for TIA/EIA-568-A compliance.
The following table summarizes the relevant cabling standards:
Cabling
Category
1000Base-
TX Compliant
Required Action
< 5 No New wiring infrastructure required.
5 Yes Verify TIA/EIA-568-A compliance.
5e Yes No action required. New installations should be designed with Cate-
gory 5e or higher.
6 Yes No action required.
> 6 Yes Connector and wiring standards to be determined.
Follow these recommendations for copper data cabling in high electrical noise envi-
ronments:
• Data cable lengths should be as short as possible, preferably 3 m (10 ft) in
length. Copper data cables should not be used for inter-building communica-
tions.
• Power and data cables should not be run in parallel for long distances, and
should be installed in separate conduits. Power and data cables should intersect
at 90° angles when necessary to reduce inductive coupling.
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Introduction
1.5.3Supported Fiber Optic Cables
• Shielded/screened cabling can be used when required. Care should be taken to
avoid the creation of ground loops with shielded cabling.
1.5.3 Supported Fiber Optic Cables
The following fiber optic cable types are supported under the stated conditions.
Distance (m)Cable Type Wavelength (nm) Modal Band-
width (MHz·km) 100Base-FX 1000Base-SX 10GBase-SR
850 200 — 275 33OM1 (62.5/125)
1300 500 2000 — —
850 500 — 550 82OM2 (50/125)
1300 500 2000 — —
850 1500 — 550 300OM3 (50/125)a
1300 500 2000 — —
850 3500 — 550 400OM4 (50/125)a
1300 500 2000 — —
aLaser optimized.
1.6 Tamper-Evident Security Seals
In compliance with the security requirements of the Federal Information Processing
Standards (FIPS140-2), FIPS-compliant tamper-evident security seals are applied to
potential access points on this device. Security seals provide evidence of unautho-
rized tampering or removal of components.
NOTICE
Worn, damaged or missing seals must be replaced immediately.
Replacement seals are available for purchase from Siemens. For more information,
contact a Siemens Sales representative.
There are three ways to determine if a security seal has been tampered with:
• The seal is cut or torn
• A pattern is left on the device when the top layer of the seal is removed
• Residue left by the seal is visible on the device under ultra-violet light
For information about the placement of security seals, refer to the RUGGEDCOM
RUGGEDCOM RSG2200F FIPS 140-2 Non-Proprietary Security Policy [https://sup-
port.industry.siemens.com/cs/ww/en/view/109757984] .
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Introduction
1.6Tamper-Evident Security Seals
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Installing the Device 2
The following sections describe how to install the device, including mounting the de-
vice, installing/removing modules, connecting power, and connecting the device to
the network.
DANGER
Electrocution hazard – risk of serious personal injury and/or damage to equip-
ment.
Before performing any maintenance tasks, make sure all power to the device has
been disconnected and wait approximately two minutes for any remaining energy
to dissipate.
WARNING
Radiation hazard – risk of serious personal injury
This product contains a laser system and is classified as a CLASS 1 LASER PRODUCT.
Use of controls or adjustments or performance of procedures other than those speci-
fied herein may result in hazardous radiation exposure.
NOTICE
This product contains no user-serviceable parts. Attempted service by unauthorized
personnel shall render all warranties null and void.
Changes or modifications not expressly approved by Siemens AG could invalidate
specifications, test results, and agency approvals, and void the user's authority to
operate the equipment.
NOTICE
This product should be installed in a restricted access location where access can only
be gained by authorized personnel who have been informed of the restrictions and
any precautions that must be taken. Access must only be possible through the use of
a tool, lock and key, or other means of security, and controlled by the authority re-
sponsible for the location.
2.1 General Procedure
The general procedure for installing the device is as follows:
NOTICE
The user is responsible for the operating environment of the device, including main-
taining the integrity of all protective conductor connections and checking equip-
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Installing the Device
2.2Unpacking the Device
ment ratings. Make sure to review all operating and installation instructions before
commissioning or performing maintenance on the device.
1. Review the relevant certification information for any regulatory requirements.
For more information, refer to "Approvals (Page 39)".
2. Mount the device.
3. Connect the failsafe alarm relay.
4. Connect power to the device and ground the device to safety Earth.
5. Connect the device to the network.
6. Configure the device.
2.2 Unpacking the Device
When unpacking the device, do the following:
1. Inspect the package for damage before opening it.
2. Visually inspect each item in the package for any physical damage.
3. Verify all items are included.
NOTICE
If any item is missing or damaged, contact Siemens for assistance.
2.3 Mounting the Device
The RUGGEDCOM RSG2200F is designed for maximum mounting and display flexibil-
ity. It can be equipped with connectors that allow it to be installed in a 48 cm (19 in)
rack, 35 mm (1.4 in) DIN rail, or directly on a panel.
NOTICE
Heat generated by the device is channeled outwards from the enclosure. As such, it
is recommended that 2.5 cm (1 in) of space be maintained on all open sides of the
device to allow for some convectional airflow.
Forced airflow is not required. However, any increase in airflow will result in a reduc-
tion of ambient temperature and improve the long-term reliability of all equipment
mounted in the rack space.
Note
For detailed dimensions of the device with either rack, DIN rail or panel hardware in-
stalled, refer to "Dimension Drawings (Page 35)".
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Installing the Device
2.3.1Mounting the Device to a Rack
2.3.1 Mounting the Device to a Rack
The RUGGEDCOM RSG2200F can be secured to a standard 48 cm (19 in) rack using
separately purchased rack mount adapters. The adapters can be installed at the front
or rear of the chassis.
Each adapter kit includes four adapters.
CAUTION
Vibration hazard – risk of damage to the device
In high-vibration or seismically active locations, always install four rack mount
adapters (two at the front of the chassis and two at the rear).
CAUTION
Electrical/mechanical hazard – risk of damage to the device
Before installing the device in a rack, make sure of the following:
• When installing the device in a closed or multi-device rack, be aware the operat-
ing ambient temperature of the rack may be higher than the ambient tempera-
ture of the room. Make sure the rack is installed in a suitable environment that
can withstand the maximum ambient temperature generated by the rack.
• Make sure each device in the rack is separated by at least one rack-unit of space,
or 44 mm (1.75 in), to promote convectional airflow. Forced airflow is not re-
quired. However, any increase in airflow will result in a reduction of ambient
temperature and improve the long-term reliability of all equipment mounted in
the rack space.
• Do not exceed the maximum number of devices or weight restrictions specified
by the rack manufacturer.
• Do not overload the supply circuit. Refer to the over-current protection and pow-
er supply ratings specified by the rack manufacturer.
• Make sure the rack and all devices have a proper ground-to-Earth connection.
Pay particular attention to power supply connections other than direct connec-
tions to the branch circuit (e.g. power strips).
To secure the device to a standard 48 cm (19 in) rack, do the following:
Note
The device can be ordered with the communication ports located at the front or rear
of the device. Placing the ports at the rear allows all data and power cabling to be in-
stalled and connected at the rear of the rack.
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Installing the Device
2.3.2Mounting the Device on a DIN Rail
1. Make sure the rack mount adapters are installed on the correct side of the chas-
sis.
• To make the modules and ports accessible, install the rack mount adapters
at the rear of the chassis
• To make the management ports and LEDs accessible, install the rack mount
adapters at the front of the chassis
Note
The chassis features multiple mounting holes, allowing the rack mount adapters
to be installed up to 25 mm (1 in) from the face of the device.
1 2
3 3
1 Rear
2 Front
3 Rack Mount Adapter
Figure2.1 Rack Mount Adapters
2. If required, install adapters on the opposite side of the device to protect from vi-
brations.
3. Insert the device into the rack.
4. Secure the adapters to the rack using the supplied hardware.
2.3.2 Mounting the Device on a DIN Rail
For DIN rail installations, the RUGGEDCOM RSG2200F can be equipped with pan-
el/DIN rail adapters pre-installed on each side of the chassis. The adapters allow the
device to be slid onto a standard 35 mm (1.4 in) DIN rail.
NOTICE
DIN rail mounting is not recommended for constant vibration environments.
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Installing the Device
2.3.3Mounting the Device to a Panel
To mount the device to a DIN rail, do the following:
1. Align the adapters with the DIN rails and slide the device into place.
1
3
2
3
2
1 Panel/DIN Rail Adapter
2 DIN Rail
3 Screw
Figure2.2 DIN Rail Mounting
2. Install one of the supplied screws on either side of the device to secure the
adapters to the DIN rails.
2.3.3 Mounting the Device to a Panel
For panel installations, the RUGGEDCOM RSG2200F can be equipped with panelDIN
rail adapters pre-installed on each side of the chassis. The adapters allow the device
to be attached to a panel using screws.
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Installing the Device
2.4Connecting the Failsafe Alarm Relay
To mount the device to a panel, do the following:
1. Place the device against the panel and align the adapters with the mounting
holes.
21
1
1 Screw
2 Panel/DIN Rail Adapter
Figure2.3 Panel Mounting
2. Install the supplied screws to secure the adapters to the panel.
2.4 Connecting the Failsafe Alarm Relay
The failsafe relay can be configured to latch based on alarm conditions. The NO
(Normally Open) contact is closed when the unit is powered and there are no ac-
tive alarms. If the device is not powered or if an active alarm is configured, the relay
opens the NO contact and closes the NC (Normally Closed) contact.
Note
Control of the failsafe relay output is configurable through RUGGEDCOM RSG2200F .
One common application for this relay is to signal an alarm if a power failure oc-
curs. For more information, refer to the RUGGEDCOM RSG2200F User Guide for the
RUGGEDCOM RSG2200F.
The following shows the proper relay connections.
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Installing the Device
2.5Connecting Power
13
2
1 Normally Open
2 Common
3 Normally Closed
Figure2.4 Failsafe Alarm Relay Wiring
2.5 Connecting Power
The RUGGEDCOM RSG2200F supports a single or dual redundant AC and/or DC pow-
er supplies.
The RUGGEDCOM RSG2200F can be equipped with either a screw-type or pluggable
terminal block, which provides power to both power supplies . The screw-type ter-
minal block is installed using Phillips screws and compression plates, allowing either
bare wire connections or crimped terminal lugs. Use #6 size ring lugs for secure, reli-
able connections under severe shock or vibration.
CAUTION
Electrical hazard – risk of damage to the device
Make sure power input to the device is within the specified input range. For infor-
mation about the nominal input range for the device, refer to "Power Supply Specifi-
cations (Page 31)".
Note
• For maximum redundancy in a dual power supply configuration, use two inde-
pendent power sources.
• Use minimum #16 gage copper wiring when connecting terminal blocks.
• For 100-240 VAC rated equipment, an appropriately rated AC circuit breaker
must be installed.
• For 125/250 VDC rated equipment, an appropriately rated DC circuit breaker
must be installed.
• A circuit breaker is not required for 12, 24 or 48 VDC rated power supplies.
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