Moxa Technologies PT-G7728 User manual

P/N: 1802077280416
*1802077280416*
PT-G7728/G7828 Series
Quick Installation Guide
Version 2.1, October 2023
Technical Support Contact Information
www.moxa.com/support

2023 Moxa Inc. All rights reserved.

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Package Checklist
Moxa’s PT-G7728/G7828 industrial rackmount switch is shipped with
the following items. If any of these items are missing or damaged,
please contact your customer service representative for assistance.
•1 PT-G7728 or G7828 switch
•2 protective caps for unused ports, 3 protective caps for unused
USB ports
•2 rackmount ears
•Quick installation guide (printed)
•Substance Disclosure Table
•Product Certificate of Quality Inspection (Simplified Chinese)
•Product Notices (Simplified Chinese)
•Warranty card
NOTE
You can find information and software downloads on the
relevant product pages located on Moxa’s website:
www.moxa.com/
Default Settings
•Default IP address: 192.168.127.253
•Default Subnet Mask: 255.255.255.0
•Default Usernames: admin, user
•Default Password: moxa
Panel Layouts
Front Panel
1. System status LEDs (from left to right):
STATE LED indicator, MSTR/HEAD LED indicator, FAULT LED
indicator, CPLR/Tail LED indicator, SYNC LED indicator
2. 2 x 100/1000Base SFP ports
3. 2 x 10/100/1000BaseT(X) ports
4. 100/1000Base SFP port status LEDs
5. 10/100/1000BaseT(X) port status LEDs
6. Ethernet module slot 1
7. Ethernet module slot 2
8. Ethernet module slot 3
9. Ethernet module slot 4
10. Ethernet module slot 5
11. Ethernet module slot 6
12. Power module slot 1
13. Power module slot 2
14. Grounding screw

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Rear Panel
1. Console port (RJ45, RS-232)
2. USB storage port
3. System LED indicators
4. Module and port LED indicators
5. Reset button
Dimensions
Unit: mm (inches)
Ethernet Modules
LM-7000H-4GTX
LM-7000H-4TX
LM-7000H-4GSFP
LM-7000H-4GPoE
LM-7000H-4PoE
LM-7000H-2GPHR

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NOTE
The LM-7000H-2GPHR module enables the device to interact
with a redundancy network using
the High-
Availability Seamless
Redundancy (HSR) and Parallel Redundancy (PRP) protocols. To
use this module, the PT
-G7728 switch must have Firmware
V6.2 or higher.
NOTE
The LM
-7000H-2GPHR module is only supported in slot
5 of the
PT-G7728 Series.
Power Modules
PWR-HV-P48
PWR-LV-P48
PWR-HV-NP
PWR-LV-NP
Rack Mounting Instructions
1. Elevated Operating Temperature:If installed in a closed or
multi-unit rack assembly, the operating ambient temperature of
the rack environment may be greater than room temperature.
Therefore, consideration should be given to installing the
equipment in an environment compatible with the maximum
ambient temperature (Tma) specified by the manufacturer.
NOTE
To ensure reliable operations, please make sure the operation
temperature of the environment does not exceed the spec.
When mounting a rack
-mounted switch with other operating
units in a cabinet without forced ventilation, it is recommended
that 1U of space
is reserved between each rack-
mounted switch
and/or device. It is the responsibility of the user to ensure that
the equipment is installed, operated
, and used for its intended
function in the manner specified by Moxa.
2. Required Air Flow: Installation of the equipment in a rack should
be such that the amount of air flow required for safe operation of
the equipment is not compromised.
3. Mechanical Loading: Mounting of the equipment in the rack
should be such that a hazardous condition is not achieved due to
uneven mechanical loading.
4. Circuit Overloading: Consideration should be given to the
connection of the equipment to the supply circuit and the effect
that overloading of the circuits might have on overcurrent
protection and supply wiring. Appropriate consideration of
equipment nameplate ratings should be used when addressing this
concern.
5. Reliable Grounding: Rack-mounted equipment should be reliably
grounded and should not be removed when the equipment is
energized. We suggest using a conductor that is 0.75 mm2or 18

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AWG and the thread diameter should be at least 3.5 mm.
Particular attention should be given to supply connections other
than direct connections to the branch circuit (e.g., use of power
strips).
NOTE
The rackmount ears can be installed on the front or rear of the
PT-G7728/G7828 switch.
ATTENTION
Safety First
!
Be sure to disconnect the power cord before installing and/or
wiring your Ethernet Switch. Calculate the maximum possible
current in each power wire and common wire. Observe all
electrical codes
dictating the maximum current allowable for
each wire size. If the current goes above the maximum ratings,
the wiring could overheat,
which can cause serious damage to
your equipment.
WARNING
This is a Class 1
laser/LED product. Do not stare directly into
the laser beam.
Connecting the Power Inputs
The PT-G7728/PT-G7828 switches support 4 types of power supply:
•PWR-HV-P48: one 110/220 VAC/VDC (90 to 264 VAC, 88 to 300
VDC), one 48VDC PoE power input for PoE+ ports.
•PWR-LV-P48: one 24/48 VDC (18 to 72 VDC), one 48 VDC PoE
power input for PoE+ ports.
•PWR-HV-NP: one 110/220 VAC/VDC (90 to 264 VAC, 88 to 300
VDC).
•PWR-LV-NP: one 24/48 VDC (18 to 72 VDC).
For the PWR-HV-P48, the 110/220 VAC/VDC power supplies provide
power to the switch. Separate 48 VDC power supplies are required to
provide power to 12 PoE+ ports (50 to 57 VDC is recommended for
IEEE 802.3at devices).
For the PWR-LV-P48 models, the 24/48 VDC power supplies provide
power to the switch. Separate 48 VDC power supplies are required to
provide power to 12 PoE+ ports (50 to 57 VDC is recommended for
IEEE 802.3at devices).
To provide power to 24 PoE+ ports, two power modules should be
used.
For the PWR-HV-NP, the 110/220 VAC/VDC power supplies provide
power to the switch.
For the PWR-LV-NP, the 24/48 VDC power supplies provide power to
the switch.

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Wiring Requirements
WARNING
Do not disconnect modules or wires unless power has been
switched off or the area is known to be non
-hazardous. The
device may only be connected to the supply voltage
printed
next to the power input
. The device is designed for operation
with a Safety Extra
-Low Voltage (SELV) or an isolated power
supply, which means that they may only be connected to the
supply voltage connections and to the signal contact with a
SELV or an isolated power supply in co
mpliance with IEC
60950-1.
Power Terminal Blocks
The connection for power input and PoE external power supply is on the
power modules.
PWR-HV-P48/PWR-HV-NP
STEP 1: Insert the neutral/line (L/N/Ground) AC wires into the
terminals.
STEP 2: Insert the terminal block connector into the terminal block
receptor.
PWR-LV-P48/PWR-LV-NP
STEP 1: Insert the negative/positive (-/+) DC wires into the terminals.
STEP 2: Insert the terminal block connector prongs into the terminal
block receptor.
PoE Power Terminal Blocks
STEP 1: Insert the negative/positive DC wires into the -/+ terminals,
respectively.
STEP 2: Insert the terminal block connector prongs into the terminal
block receptor.
NOTE
To have higher levels of protection against surge, it is
suggested to install a surge protector in front of the power
input
of the PoE powered device so that it is suitable for use in
IEC 61850 conditions.
NOTE
To activate the redundant load sharing mode, install two power
modules on the PT
-G7728/G7828 Series and ensure they are
both active.

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NOTE
The reverse power input connection will not activate the device
or PoE input. In addition, the PoE will only
activate when the
system power input is installed on the same power unit.
Wiring the Relay Contact
Each power module has one relay output that can provide two types of
relay output. Refer to the table below for detailed information.
The relay contact is used to detect user-configured events. Two wires
are attached to the relay pins with normally close and normally open
options.
FAULT:
The relay contact of the 3-pin terminal block connector is used to detect
user-configured events. The module provides normally open and
normally closed circuits depending on what the user chooses. For pin
definitions refer to the table below.
Relay connection
Power on state
Event trigger
NO and COM
Closed circuit
Open circuit
NC and COM
Open circuit
Closed circuit
NOTE
When wiring the relay contact, we suggest using the cable type
-
AWG (American Wire Gauge) 16-24 (1.31-0.205 mm2) and
the corresponding pin type cable terminals. The connector must
be able to withstand torque at maximum 5
pound-inches. The
rated temperature of wiring should be at least 105°C.
Install/Remove the Ethernet Module
The Ethernet modules are hot-swappable. You have the option to
mount or remove the Ethernet module while the device is operating.
The installation procedure is as follows:
1. Insert the Ethernet module straight into the slot.
2. Fasten the module to the device by tightening the 2 screws.
Use a torque of 3.5 kgf-cm (0.35 Nm).
The removal procedure is as follows:
1. Loosen the 2 screws of the module.
2. Pull the module out of the slot.
3. Insert the dummy module into the slot to have better protection
against dust and EMI.
4. Fasten the dummy module using 2 screws. The tightening torque
is 4 kgf-cm (0.40 Nm)
Install/Remove the Power Module
The power supply units are hot-swappable. You have the option to
mount or remove the power supply units while the device is operating.
The installation procedure is as follows:
1. Insert the power unit straight into the slot.
2. Fasten the unit to the device by tightening the 2 screws. The
tightening torque is 3.5 kgf-cm (0.35 Nm)

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The removal procedure is as follows:
1. Loosen the 2 screws of the module.
2. Pull the module out of the slot.
3. Insert the dummy module into the slot to have better protection
against dust and EMI.
4. Fasten the dummy module using 2 screws. The tightening torque
is 4 kgf-cm (0.40 Nm)
NOTE
If one of the modules is removed from the device, it is
advisable to insert a dummy module
to provide better
protection against dust and EMI.
Grounding the Moxa Industrial Rackmount Switch
Grounding and wire routing help limit the effects of noise due to
electromagnetic interference (EMI). Run the ground connection from
the ground screw to the grounding surface prior to connecting devices.
NOTE
Using a shielded cable achieves better electromagnetic
resistance.
Console Port Connection
The PT-G7728/G7828 device has one RJ45 console port (RS-232)
located on the front panel. Use a RJ45-to-DB9 cable (see the cable
wiring diagram below) to connect the PT-G7728/G7828’s console port
to your PC’s COM port. You may then use a console terminal program,
such as Moxa PComm Terminal Emulator, to access the console
configuration utility of the PT-G7728/G7828.
R
J45 Console Port Pinouts
Pin
Description
1
DSR
2
RTS
3
–
4
TxD
5
RxD
6
GND
7
CTS
8
DTR
USB Storage Connection
The USB storage port is on the rear panel of the PT-G7728/G7828
switch. (Type A connector; see the diagram below for pinout
assignments). Use Moxa’s ABC-02-USB automatic backup configurator
to connect to the PT-G7728/G7828 USB storage port to perform
configuration backup, firmware upgrade, or system log file backup.
Pin
Description
1
VCC (+5V)
2
D- (Data-)
3
D+ (Data+)
4
GND (Ground)

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The Reset Button
The reset button can perform two functions. One is to reset the PT-
G7728/G7828 switch back to factory default settings and the other is to
perform a quick back up of configuration and log files to the ABC-02-
USB automatic backup configurator.
Reset to Factory Default Settings
Depress the Reset button for five seconds to load the factory default
settings. Use a pointed object, such as a straightened paper clip or
toothpick, to depress the Reset button. When you do so, the STATE LED
will start to blink about once per second. Continue to depress the
STATE LED until it begins blinking more rapidly; this indicates that the
button has been depressed for five seconds and you can release the
Reset button to load factory default settings.
NOTE
DO NOT power off the switch when loading default settings.
Configuration and Log Files Back Up
When the ABC-02-USB is connected to the PT-G7728/G7828 switch, the
reset button allows for a quick back up of configuration and event logs
to the ABC-02-USB. Press the reset button to start backing up the
current system configuration files and event logs to the ABC-02-USB.
NOTE
When the ABC-02 is plugged in, you cannot reset to factory
default by pressing the reset button.
LED Indicators
The front panel of the PT-G7728/G7828 switch contains multiple LED
indicators. The function of each LED is described in the table below:
LED
Color
State
Description
System LEDs
STATE
Green
On System has passed self-diagnosis test on
boot-up and is ready to run
Blinking
1. When the reset button is pressed for 5
seconds, the LED will blink continuously (1
time/s) until the device is reset to the
factory default.
2. When an ABC-02 automatic backup device
is detected, the LED will blink slowly (1
time/2s).
Red On
System failed self-diagnosis on boot up.
•Switch Initiate fail.
•Fail Firmware Checksum Fail/
Uncompressed Fail
FAULT Red On
One of the following has happened:
1. ABC Loading/Saving Failure.
2. The port has been disabled because the
ingress multicast and broadcast packets
exceed the ingress rate limit.
3. Incorrect loop connection in a single switch
4. The Ring port connection is not valid.

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LED
Color
State
Description
Off
System is in normal operation
SYNC Amber
On
PTP function is enabled
Blinking
The device is starting to receive the sync
packet
Green
On
The PTP function has successfully converged
MSTR/
HEAD Green
On
1. This switch is set as the Master of the
Turbo Ring, or as the Head of the Turbo
Chain.
2. POST H.W. Fail (+State on and Fault
blinking)
Blinking
1. The switch has become the Ring Master of
the Turbo Ring.
2. Head of the Turbo Chain, after the Turbo
Ring or the Turbo Chain went down.
3. The switch is set as Turbo Chain’s Member
and the corresponding chain port is down.
Off
1. The switch is not the Master of this Turbo
Ring.
2. T
he switch is set as a Member of the Turbo
Chain.
CPLR/
TAIL Green
On
1. The switch coupling function is enabled to
form a backup path.
2. It is set as the Tail of the Turbo Chain.
3. POST S.W. Fail (+State on and Fault
blinking)
Blinking
1. Turbo Chain is down.
2. The switch is set as Turbo Chain’s Member
and the corresponding chain port is down.
Off 1. This switch disabled the coupling function.
2. Set as a Member of the Turbo Chain.
When the system is importing/exporting data from or to an ABC-02-
USB automatic backup device, the FAULT, MSTR/HEAD, and CPLR/TAIL
LEDs will blink in sequence.
Port Status LEDs
Ports
1 to 4
Green
On Port's 1000 Mbps link is active.
PoE port is connected to PoE device.
Blinking
Data is transmitting at 1000 Mbps.
PoE port is connected to PoE device.
Amber
On
Port's 10/100 Mbps link is active.
PoE port is connected to PoE device.
Blinking
Data is transmitting at 10/100 Mbps.
PoE port is connected to PoE device.
Red On
PoE power failure:
•Once per second: PoE detection failure
•Twice per second: short-circuit,
overloading, or outside operating
temperature range
Off
Port’s link is inactive