Cyber Power RT33020KE User manual

User’s Manual
RT33020/25/30KE
Cyber Power Systems, Inc.
www.cyberpower.com

Ver 1.0.0

Safety Precautions
Safety Precautions
This manual contains information concerning the installation and operation of Tower UPS.
Please carefully read this manual prior to installation.
The Tower UPS cannot be put into operation until it is commissioned by engineers approved
by the manufacturer (or its agent). Not doing so could result in personnel safety risk,
equipment malfunction and invalidation of warranty.
Safety Message Definition
Danger: Serious human injury or even death may be caused, if this requirement is ignored.
Warning: Human injury or equipment damage may be caused, if this requirement is ignored.
Attention: Equipment damage, loss of data or poor performance may be caused, if this
requirement is ignored.
Commissioning Engineer: The engineer who installs or operates the equipment should be well
trained in electricity and safety and familiar with the operation, debug, and maintenance of the
equipment.
Warning Label
The warning label indicates the possibility of human injury or equipment damage, and
advises the proper step to avoid the danger. In this manual, there are three types of warning
labels as below.
Labels
Description
Danger
Serious human injury or even death may be caused, if this
requirement is ignored.
Warning
Human injury or equipment damage may be caused, if this
requirement is ignored.
Attention
Equipment damage, loss of data or poor performance may be
caused, if this requirement is ignored.
Safety Instruction
Danger
Performed only by commissioning engineers.
This UPS is designed for commercial and industrial
applications only, and is not intended for any use in
life-support devices or system.
Warning
Read all the warning labels carefully before operation, and
follow the instructions.
When the system is running, do not touch the surface with
this label, to avoid any hurt of scald.
ESD sensitive components inside the UPS, anti-ESD
measure should be taken before handling.

Safety Precautions
Move & Install
Danger
Keep the equipment away from heat source or air outlets.
In case of fire, use dry powder extinguisher only, any liquid
extinguisher can result in electric shock.
Warning
Do not start the system if any damage or abnormal parts
founded.
Contacting the UPS with wet material or hands may be
subject to electric shock.
Attention
Use proper facilities to handle and install the UPS. Shielding
shoes, protective clothes and other protective facilities are
necessary to avoid injury.
During positioning, keep the UPS way from shock or
vibration.
Install the UPS in proper environment, more detail in section
3.3.
Debug & Operate
Danger
Make sure the grounding cable is well connected before
connecting the power cables, the grounding cable and
neutral cable must be in accordance with the local and
national codes practice.
Before moving or re-connecting the cables, make sure to
cut off all the input power sources, and wait for at least 10
minutes for internal discharge. Use a multi-meter to
measure the voltage on terminals and ensure the voltage is
lower than 36V before operation.
Attention
The earth leakage current of load will be carried by RCCB or
RCD.
Initial check and inspection should be performed after long
time storing of UPS.
Maintenance & Replacement
Danger
All the equipment maintenance and servicing procedures
involving internal access need special tools and should be
carried out only by trained personnel. The components that
can only be accessed by opening the protective cover with
tools cannot be maintained by user.
This UPS full complies with “IEC62040-1-1-General and
safety requirements for use in operator access area UPS”.
Dangerous voltages are present within the battery box.
However, the risk of contact with these high voltages is
minimized for non-service personnel. Since the component
with dangerous voltage can only be touched by opening the
protective cover with a tool, the possibility of touching high
voltage component is minimized. No risk exists to any
personnel when operating the equipment in the normal
manner, following the recommended operating procedures

Safety Precautions
in this manual.
Battery Safety
Danger
All the battery maintenance and servicing procedures
involving internal access need special tools or keys and
should be carried out only by trained personnel.
When connected together, the battery terminal voltage will
exceed 400Vdc and is potentially lethal.
Battery manufacturers supply details of the necessary
precautions to be observed when working on, or in the
vicinity of, a large bank of battery cells. These precautions
should be followed implicitly at all times. Particular attention
should be paid to the recommendations concerning local
environmental conditions and the provision of protective
clothing, first aid and fire-fighting facilities.
Ambient temperature is a major factor in determining the
battery capacity and life. The nominal operating temperature
of battery is 20°C. Operating above this temperature will
reduce the battery life. Periodically charge the battery
according to the battery user manuals to ensure the back-up
time of UPS.
Replace the batteries only with the same type and the same
number, or it may cause explosion or poor performance.
When connecting the battery, follow the precautions for
high-voltage operation before accepting and using the
battery, check the appearance the battery. If the package is
damaged, or the battery terminal is dirty, corroded or rusted
or the shell is broken, deformed or has leakage, replace it
with new product. Otherwise, battery capacity reduction,
electric leakage or fire may be caused.
Before operating the battery, remove the finger ring,
watch, necklace, bracelet and any other metal jewelry
Wear rubber gloves.
Eye protection should be worn to prevent injury from
accidental electrical arcs.
Only use tools (e.g. wrench) with insulated handles.
The batteries are very heavy. Please handle and lift the
battery with proper method to prevent any human injury
or damage to the battery terminal.
Do not decompose, modify or damage the battery.
Otherwise, battery short circuit, leakage or even human
injury may be caused.
The battery contains sulfuric acid. In normal operation,
all the sulfuric acid is attached to the separation board
and plate in the battery. However, when the battery
case is broken, the acid will leak from the battery.
Therefore, be sure to wear a pair of protective glasses,
rubber gloves and skirt when operating the battery.
Otherwise, you may become blind if acid enters your
eyes and your skin may be damaged by the acid.
At the end of battery life, the battery may have internal
short circuit, drain of electrolytic and erosion of

Safety Precautions
positive/negative plates. If this condition continues, the
battery may have temperature out of control, swell or
leak. Be sure to replace the battery before these
phenomena happen.
If a battery leaks electrolyte, or is otherwise physically
damaged, it must be replaced, stored in a container
resistant to sulfuric acid and disposed of in accordance
with local regulations.
If electrolyte comes into contact with the skin, the
affected area should be washed immediately with
water.
Disposal
Warning
Dispose of used battery according to the local instructions

Contents
Contents
Chapter 1 Product Introduction............................................................................................1
1.1 System Configuration............................................................................................1
1.2 Operation Mode.....................................................................................................1
1.2.1 Normal Mode......................................................................................................1
1.2.2 Battery Mode......................................................................................................2
1.2.3 Bypass Mode......................................................................................................2
1.2.4 Maintenance Mode (Manual Bypass) ................................................................2
1.2.5 ECO Mode..........................................................................................................3
1.2.6 Auto-restart Mode...............................................................................................3
1.2.7 Frequency Converter Mode ...............................................................................3
1.3 UPS models and configurations............................................................................4
1.3.1 UPS model .........................................................................................................4
1.3.2 UPS configuration ..............................................................................................4
1.4 Appearance and Configuration..............................................................................4
1.4.1 Appearance ........................................................................................................4
1.4.2 Configuration......................................................................................................4
Chapter 2 Installation Instruction.........................................................................................6
2.1 Unpacking and Inspection.....................................................................................6
2.2 Notes for Installation..............................................................................................6
2.2.1 Moving and Unpacking of the Cabinet...............................................................6
2.3 Main Cabinet Installation.......................................................................................6
2.3.1 Tower Installation...............................................................................................6
2.3.2 Rack Installation.................................................................................................6
2.4 Power Cables........................................................................................................8
2.4.1 Specifications.....................................................................................................8
2.4.2 Specifications for Power Cables Terminal..........................................................8
2.4.3 External breakers specifications ........................................................................8
2.4.4 Connecting Power Cables..................................................................................9
2.5 Control and Communication Cables .....................................................................9
2.5.1 Dry Contact Interface .......................................................................................10
2.5.2 Communication Interface.................................................................................13
Chapter 3 LCD Panel.........................................................................................................14
3.1 Control and Operation Panel...............................................................................14
3.2 LCD Screen.........................................................................................................14
3.3 Main menu...........................................................................................................15
3.3.1 Main menu........................................................................................................15
3.3.2 Main menu........................................................................................................15
3.3.3 Main menu........................................................................................................17
3.3.4 Main menu........................................................................................................20
3.3.5 Main menu........................................................................................................22
3.3.6 Main menu........................................................................................................22
3.4 Menu Window......................................................................................................23
Chapter 4 Operations ........................................................................................................24
4.1 UPS Start-up .......................................................................................................24
4.1.1 Start from Normal Mode...................................................................................24
4.1.2 Start from Battery.............................................................................................25
4.2 Procedure for Switching between Operation Modes..........................................26
4.2.1 Switching the UPS into Battery Mode from Normal Mode...............................26

Contents
4.2.2 Switching the UPS into Bypass Mode from Normal Mode ..............................26
4.2.3 Switching the UPS into Normal Mode from Bypass Mode ..............................27
4.2.4 Switching the UPS into Normal Mode from Maintenance Bypass Mode.........27
4.3 Battery Maintenance ...........................................................................................27
4.4 Installation of Parallel Operation System............................................................27
4.4.1 Parallel system diagram...................................................................................27
4.4.2 Parallel system setting .....................................................................................29
Chapter 5 Maintenance .....................................................................................................32
5.1 Precautions..........................................................................................................32
5.2 Instruction for Maintaining UPS...........................................................................32
5.3 Instruction for Maintaining Battery string.............................................................32
Chapter 6 Product Specification........................................................................................34
6.1 Applicable Standards ..........................................................................................34
6.2 Environmental Characteristics ............................................................................34
6.3 Mechanical Characteristic...................................................................................34
6.4 Electrical Characteristics.....................................................................................35
6.4.1 Electrical Characteristics (Input Rectifier)........................................................35
6.4.2 Electrical Characteristics (Intermediate DC Link)............................................35
6.4.3 Electrical Characteristics (Inverter Output)......................................................36
6.4.4 Electrical Characteristics (Bypass Mains Input)...............................................36
6.5 Efficiency.............................................................................................................37
6.6 Display and Interface...........................................................................................37

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RT33020/25/30KE User Manual
Chapter 1 Product Introduction
Chapter 1 Product Introduction
The series rack-mountable UPS using on-line double conversion design and DSP
based digital control. It supplies stable and uninterrupted power for the important load. It
can eliminate the power supply surge, instantaneous high/low voltage, harmonic and
frequency offset pollution, to provide high quality electrical energy to customers.
1.1 System Configuration
The Tower UPS is configured by the following part: Rectifier, Charger, Inverter, Static
Switch and Manual Bypass Switch. One or several battery strings should be installed to
provide backup energy once the utility fails. The UPS structure is shown in Fig. 1-1.
Rectifier
AC/DC Inverter
DC/AC
Charger
DC/DC
Bypass Input
Battery
Load
Static Switch
Main Input
Fig.1-1 UPS Configuration
1.2 Operation Mode
The Tower UPS is an on-line, double-conversion UPS that permits operation in the
following modes:
Normal mode
Battery mode
Bypass mode
Maintenance mode (manual bypass)
ECO mode
Auto-restart mode
Frequency Converter mode
1.2.1 Normal Mode
The inverter of power modules continuously supply the critical AC load. The
rectifier/charger derives power from the AC mains input source and supplies DC power to
the inverter while simultaneously FLOAT or BOOST charging its associated backup
battery.
Rectifier
AC/DC Inverter DC/AC
Charger
DC/DC
Bypass Input
Battery
Load
Static Switch
Main Input

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2 RT33020/25/30KE User Manual
Fig.1-2 Normal mode operation diagram
1.2.2 Battery Mode
Upon failure of the AC mains input power, the inverter of power modules, which obtain
power from the battery, supply the critical AC load. There is no interruption in power to
the critical load upon failure. After restoration of the AC mains input power, the” Normal
mode” operation will continue automatically without the necessity of user intervention.
Rectifier
AC/DC Inverter
DC/AC
Charger
DC/DC
Bypass Input
Battery
Load
Static Switch
Main Input
Fig.1-3 Battery mode operation diagram
1.2.3 Bypass Mode
If the inverter overload capacity is exceeded under Normal mode, or if the inverter
becomes unavailable for any reason, the static transfer switch will perform a transfer of
the load from the inverter to the bypass source, with no interruption in power to the critical
AC load. Should the inverter be asynchronous with the bypass, the static switch will
perform a transfer of the load from the inverter to the bypass with power interruption to the
load. This is to avoid large cross currents due to the paralleling of unsynchronized AC
sources. This interruption is programmable but typically set to be less than 3/4 of an
electrical cycle, e.g., less than 15ms (50Hz) or less than 12.5ms (60Hz). The action of
transfer/re-transfer can also be done by the command through monitor.
Rectifier
AC/DC Inverter DC/AC
Charger
DC/DC
Bypass Input
Battery
Load
Static Switch
Main Input
Fig.1-4 Bypass mode operation diagram
1.2.4 Maintenance Mode (Manual Bypass)
A manual bypass switch is available to ensure continuity of supply to the critical load
when the UPS becomes unavailable e.g. during a maintenance procedure. (See Fig.1-5).

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Chapter 1 Product Introduction
Main Input
Manual Bypass
Battery
Bypass
Input
Output
Switch
Rectifier/
Discharger Inverter
Charger
Load
Fig.1-5 Maintenance mode operation diagram
Danger
During Maintenance mode, dangerous voltages are present on the terminal of input, output
and neutral, even with all the modules and the LCD turned off.
1.2.5 ECO Mode
To improve system efficiency, UPS rack system works in Bypass mode at normal time,
and inverter is standby. When the utility fails, the UPS transfers to Battery Mode and the
inverter provide powers to the loads.
Rectifier
AC/DC Inverter DC/AC
Charger
DC/DC
Bypass Input
Battery
Load
Static Switch
Main Input
Fig.1-6 ECO Mode operation diagram
Note
There is a short interruption time (less than 10ms) when transfer from ECO mode to battery
mode, it must be sure that the interruption has no effect on loads.
1.2.6 Auto-restart Mode
The battery may become exhausted following an extended AC mains failure. The
inverter shuts down when the battery reaches the End of Discharge Voltage (EOD). The
UPS may be programmed to “System Auto Start Mode after EOD”. The system starts
after a delay time when the AC main recovers. The mode and the delay time are
programmed by the commissioning engineer.
1.2.7 Frequency Converter Mode
By setting the UPS to Frequency Converter mode, the UPS could present a stable

Chapter 1 Product Introduction
4 RT33020/25/30KE User Manual
output of fixed frequency (50 or 60Hz), and the bypass static switch is not available.
1.3 UPS models and configurations
1.3.1 UPS model
The configuration table for UPS is shown in Table 1.1:
Table 1.1 UPS model table
Type
Model Name
20kVA long backup
RT33020KE
25kVA long backup
RT33025KE
30kVA long backup
RT33030KE
1.3.2 UPS configuration
The configuration table for UPS is shown in table 1.2:
Table 1.2 UPS configuration table
Components
Quantity
Remark
Dual Input
3
Standard
Dry Contact Card
1
Standard
Cold start
1
Standard
Parallel Card
1
Optional
Circuit Breakers
1
Optional
Battery
1
Optional
1.4 Appearance and Configuration
1.4.1 Appearance
The appearance of the UPS is shown in Fig. 1-7:
Fig.1-7 UPS Outlook
Note: Non-professionals are forbidden to open the case cover, otherwise there may be an
electric shock hazard
1.4.2 Configuration
Operation display panel:
The UPS front panel unit is shown in Fig.1-7. The operation display panel is located on the
front panel of the UPS, providing the LED indicator, the LCD display and the control button.

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Chapter 1 Product Introduction
See the "operation display panel" for more details".
Rear panel
As shown in Fig.1-8, the UPS rear panel offers the following components:
Fig.1-8 UPS rear panel
Components
Remark
RS232
Standard
RS485
Standard
Connector
Standard
SNMP
Optional
Parallel Card
Optional
USB
Optional
LBS
Optional

Chapter 2 Installation Instruction
6 RT33020/25/30KE User Manual
Chapter 2 Installation Instruction
This chapter introduces UPS installation include unpacking and inspection, main Cabinet
Installation, cables connection.
2.1 Unpacking and Inspection
1) Unpack the packaging and check the package contents. The shipping package contains:
● UPS
● User manual
2) Inspect the appearance of the UPS to see if there is any damage during transportation. Do
not turn on the unit and notify the carrier and dealer immediately if there is any damage or
lacking of some parts.
3) If you need tower type installation, you need to find the support block and the middle seat in
advance. You need a support seat and 2 middle seats
2.2 Notes for Installation
1) The UPS must be installed in a location with good ventilation, far away from water,
inflammable gas and corrosive agents.
2) Ensure the air vents on the front and rear of the UPS are not blocked. Allow at least 0.5m of
space on each side.
3) Condensation to water drops may occur if the UPS is unpacked in a very low temperature
environment. In this case it is necessary to wait until the UPS is fully dried inside out before
proceeding installation and use. Otherwise there are hazards of electric shock.
NOTICE：UPS operation in sustained temperature outside the range of 15-25C
(59-77F) reduces battery life.
2.3 Main Cabinet Installation
Two installation modes are available: Tower installation and Rack installation, depending on
available space and user considerations. You can select an appropriate installation mode
according to the actual conditions.
2.3.1 Tower Installation
Various installation configurations are available: single UPS, single UPS with single or
multiple battery cabinets. Their installation methods are all the same.
Please prepare support bases and spacers before installation
1) Take out the support bases and spacers and then assemble the spacer and the support
bases, shown as Fig.2-1.
Fig.2-1 Support Bases and Spacers Assembly

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Chapter 2 Installation Instruction
2) Place the UPS on the support bases, shown as Fig.2-2.
Fig.2-2 Tower Installation
3) Remove the LOGO in the upper right corner, turn it 90 degrees counterclockwise, and
then insert it.
2.3.2 Rack Installation
Battery cabinets must be installed firstly because battery cabinets are too heavy. And two
or more installation personnel are required to install them at the same time. Please install them
from bottom to top.
1) Install the guide rail
2) Put the UPS and battery cabinet on the guide rail, fix the units to the service rack, shown
as Fig.2-3.
Fig.2-3 Rack Mounted Installation

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8 RT33020/25/30KE User Manual
2.4 Power Cables
2.4.1 Specifications
The UPS power cables are recommended in Table 2.1.
Table 2.1 Recommended cables for power cables
Contents
Main Input
Bypass Input
Output
Battery
PE
Phase
L1
L2
L3
N
L1
L2
L3
N
L1
L2
L3
N
BAT+
N
BAT-
PE
Current（A）
45
45
45
45
38
38
38
38
38
38
38
66
78
78
78
45
Size（mm²）
10
10
10
10
10
10
10
10
10
10
10
16
16
16
16
10
Note
The recommended cable section for power cables are only for situations described below：
Ambient temperature：30℃.
AC loss less than 3%, DC loss less than 1%, The length of the AC power cables are no
longer than 50 m and the length of the DC power cables are no longer than 30 m.
Currents listed in the table are based on the 208V system (Line-to-line voltage).
The size of neutral lines should be 1.5-1.7 times the value listed above when the
predominant load is non-linear.
2.4.2 Specifications for Power Cables Terminal
Specifications for power cables connector are listed as Table 2.2.
Table 2.2 Requirements for UPS terminal
Port
Connection
Bolt
Bolt Aperture
Torque Moment
Mains input
Cables crimped
OT terminal
M6
7mm
4.9Nm
Bypass Input
Cables crimped
OT terminal
M6
7mm
4.9Nm
Battery Input
Cables crimped
OT terminal
M6
7mm
4.9Nm
Output
Cables crimped
OT terminal
M6
7mm
4.9Nm
PE
Cables crimped
OT terminal
M6
7mm
4.9Nm
2.4.3 External breakers specifications
UPS external air breaker recommendations are shown in Table 2.3.
Table 2.3 UPS external breaker recommendation
Input
Bypass
Output
Battery
63A/3P
63A/3P
63A/4P
DC 100A/3P
Attention
The CB with RCD (Residual Current Device) is not suggested for the system.

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Chapter 2 Installation Instruction
2.4.4 Connecting Power Cables
The steps of connecting power cables are as follows:
1. Verify that all the switches of the UPS are completely open and the UPS internal
maintenance bypass switch is open. Attach necessary warning signs to these switches to
prevent unauthorized operation.
2. Open the back door of the cabinet, remove the plastic cover. The input and output terminal,
battery terminal and protective earth terminal are shown in Fig.2-4
Fig.2-4 connections terminals
3. Connect the protective earth wire to protective earth terminal (PE).
4. Connect the AC input supply cables to the Input terminal and AC output supply cables to
the Output terminal.
5. Connect the Battery cables to the Battery terminal.
6. Check to make sure there is no mistake and re-install all the protective covers.
Note: mL1, mL2, mL3 standard for Main input phase L1, L2 and L3; bL1, bL2, bL3 standard for
Bypass Input phase L1, L2 and L3.
Attention
The operations described in this section must be performed by authorized electricians or
qualified technical personnel. If you have any difficulties, contact the manufacturer or agency.
Warning
Tighten the connections terminals to enough torque moment, refer to Table 3.3, and please
ensure correct phase rotation.
The grounding cable and neutral cable must be connected in accordance with local and
national codes.
When the cable holes does not goes through by cables, it should be filled by the hole
stopper
2.5 Control and Communication Cables
The rear panel of the cabinet provides dry contact interface(J2-J9) and communication
interface (RS232, RS485, SNMP, Parallel card interface and USB port)，as it is shown in
Fig.2-5.

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10 RT33020/25/30KE User Manual
Fig.2-5 Dry contact &communication interface
2.5.1 Dry Contact Interface
Dry contact interface includes port J2-J9 and the functions of the dry contact are shown in
Table 2.4. Table 2.4 Functions of the port
Port
Name
Function
J2-1
TEMP_BAT
Detection of battery temperature
J2-2
TEMP_COM
Common terminal for temperature detection
J3-1
TEMP_ENV
Detection of environmental temperature
J3-2
TEMP_COM
Common terminal for temperature detection
J4-1
+24V_DRY
+24V
J4-2
REMOTE_EPO_NC
Trigger EPO when disconnect with J4-1
J6-1
BCB_Drive
Output dry contact, function is settable.
Default: Battery trip signal
J6-2
BCB_Status
Input dry contact, function is settable.
Default: BCB Status and BCB Online,(Alert no
battery when BCB Status is invalid).
J7-1
BCB_Online
Input dry contact, function is settable.
Default: BCB Status and BCB Online(Alert no
battery when BCB Status is invalid).
J7-2
GND_DRY
Ground for +24V
J8-1
BAT_LOW_ALARM_NC
Output dry contact (Normally closed), function is
settable.
Default: Low battery alarming
J8-2
BAT_LOW_ALARM_NO
Output dry contact (Normally open), function is
settable.
Default: Low battery alarming
J8-3
BAT_LOW_ALARM_GND
Common terminal for J8-1 and J8-2
J9-1
GENERAL_ALARM_NC
Output dry contact, (Normally closed) function is
settable.
Default: Fault alarming
J9-2
GENERAL_ALARM_NO
Output dry contact, (Normally open) function is
settable.
Default: Fault alarming
J9-3
GENERAL_ALARM_GND
Common terminal for J9-1 and J9-2

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Chapter 2 Installation Instruction
Note
The settable functions for each port can be set by the monitor software.
The default functions of each port are described as follows.
Battery Warning Output Dry Contact Interface
The input dry contact J2 and J3 can detect the temperature of batteries and environment
respectively, which can be used in environment monitoring and battery temperature
compensation.
Interfaces diagram for J2 and J3 are shown in Fig.2-6, the description of interface is in Table
2.5.
J2 J3
TEMP_BAT
TEMP_ENV
Fig.2-6 J2 and J3 for temperature detecting
Table 2.5 Description of J2 and J3
Port
Name
Function
J2-1
TEMP_BAT
Detection of battery temperature
J2-2
TEMP_COM
common terminal
J3-1
TEMP_ENV
Detection of environmental temperature
J3-2
TEMP_COM
common terminal
Note
Specified temperature sensor is required for temperature detection (R25=5Kohm,
B25/50=3275), please confirm with the manufacturer, or contact the local maintenance
engineers when placing an order.
Remote EPO Input Port
J4 is the input port for remote EPO. It requires shorting NC and +24V during normal operation,
and the EPO is triggered when opening NC and +24V. The port diagram is shown in Fig.2-7,
and port description is shown in Table 2.6.
EPO_NC
+24V
+24V
Fig.2-7 Diagram of input port for remote EPO

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12 RT33020/25/30KE User Manual
Table 2.6 Description of input port for remote EPO
Port
Name
Function
J4-1
+24V_DRY
+24V
J4-2
REMOTE_EPO_NC
Trigger EPO when disconnect with J4-1
BCB Input Port
The default function of J6 and J7 are the ports of BCB. The port diagram is shown in Fig.2-8,
and description is shown in Table 2.7.
BCB_DRV
BCB_CONT
J6 J7
BCB_ONL
+24V
+24V
+24V
Fig.2-8 BCB Port
Table 2.7 Description of BCB port
Port
Name
Function
J6-1
BCB_DRIV
BCB contact drive, provides +24V voltage，20mA
drive signal
J6-2
BCB_Status
BCB contact status, connect with the normally
open signal of BCB
J7-1
BCB_Online
BCB on-line input (normally open) , BCB is
on-line when the signal is connecting with J7-2
J7-2
GND_DRY
Power ground for +24V
Battery Warning Output Dry Contact Interface
The default function of J8 is the output dry contact interface, which presents the battery
warnings of low or excessive voltage, when the battery voltage is lower than set value, an
auxiliary dry contact signal will be activated via the isolation of a relay. The interface diagram is
shown in Fig.2-9, and description is shown in Table 2.8.
Fig.2-9Battery warning dry contact interface diagram
J8
BAT_LOW_NC
BAT_LOW_N
O
GND