Emerson NetSure 722 Brochures and Data Sheets
ACU+ Controller
M820B, M821B, M820D, M821D, M820N
DC Power for
Business-Critical Continuity
™
Key Features
n Flexible and scalable to satisfy your
present and future needs with
configurable IB (interface boards)
n Easily configurable file
upload/download minimizes
installation time
n Long battery life-span –
sophisticated boost charge
management
n Unattended battery test –
advanced scheduled test/constant
test/fast test
n High quality failure information –
programmable logic controller
provides intelligent alarm setup
n Lower operating cost –
energy-saving standby function
for rectifier
Designed for global use, the ACU+ Controller
withstands high telecom standards, providing
outstanding reliability and availability.
Description
The ACU+ is an advanced control unit designed for DC power applications. It can
provide remote monitoring of the telecom site's AC mains supply, DC power plant,
battery backup, diesel generator and site environment etc.
Featuring advanced battery management such as sophisticated boost charge
control, remaining time and capacity prediction, constant current test, scheduled
test and short test, and Battery Low Voltage Disconnection (BLVD), the ACU+
realizes easy and predictive battery maintenance. Furthermore, with basic energy
saving and power split function, the ACU+ is a highly cost-efficient product.
The information and alarms from a specific site can be monitored or checked with
a simple web browser or special monitoring software. When using a web browser,
no additional software is needed, and the web browser login is password
protected.
M820B
M821B
M820D
M821D
M820N
12012.09
ACU+ Controller
Technical Specifications
General
Power Supply 19 to 60VDC
Power Consumption 5W
Operating Temperature Range - 40°C to + 75°C/- 40°F to + 167°F
Relative Humidity 0 to 90%
EMC EN 300 386, 2001 class B, FCC part 15 class B
Safety IEC 60950-1, EN 60950-1, UL 60950-1
Approvals CE, UL and NEBS level 3
Mechanical Data
M820B and M821B: 42 x 86.6 x 211.5mm
Dimensions (H x W x D)
M820D, M821D and M820N: 86.6 x 86.8 x 211.5mm
Standard Installation Methods Hot pluggable in stand-alone or embedded power plants
Weight < 1 kg / 2.2 Ibs
Inputs/Outputs
Model M820B M821B M820D M821D M820N
Display LCD with 8 x 16 characters LCD with 4 x 16 characters
Communication RS232, RS485, Ethernet, USB
Protocol HTTP, SNMP, EEM, SocTpe, Rsoc
Inputs
Analog
Digital
2 battery
currents, 1 load
current, 1 bus
voltage, 2 battery
voltages,
3 temperatures,
3 AC voltages
1 input for status
of SPD auxiliary
contacts, 10 load
fuses, 4 battery
fuses, bi-stable
2 battery
currents, 1 load
current, 1 bus
voltage, 2 battery
voltages, 2
temperatures
1 input for status
of SPD auxiliary
contacts
contactor status
2 LVD mono &
Outputs
bistable
None
contactors
1.65 x 3.41 x 8.33inch
3.41 x 3.42 x 8.33inch
Refer to
M820B
Refer to
M821B
RS232, 10/100M
ethernet, TCP/IP,
SNMP, web server
voltages, 3 DC
system currents, 3
temperatures, 3
1 input for status
of SPD auxiliary
10 load fuses,
4 battery fuses
2 LVD mono &
3 DC systen
AC voltages
contacts
bistable
contactors
Diagram
Network Operation Center
Net Management
Centre
DC POWER
PSU PSU PSU
IE
ACU+
MODEM
IB1 or
IB2
TCP
RS232
HTTPSNMP
TCP/IP PSTN,GSM
CAN I2C RS485
SM
conv
DU
ENEC
USB memory
SM
EIB
Modules
ABBREVIATIONS
PSTN Public Switched Telephone
Network, an ordinary
telephone line
IE Internet Explorer
ENEC EnergyMaster
™
Emerson Network
Energy Center, multi-platform,
multi-user, distributed multilanguage web environment for
monitoring of Emerson Network
Power DC, HPAC and UPS
equipment
PSU Power Supply Unit (AC/DC
converter/rectifier)
SM DU Supervision Module for additional
alarms in extension cabinets
EIB Extension Interface Board
IB Interface Board
Ordering Information
stick
Large
DU
Examples of Alarms
DC Power Plant Alarms
AC mains failure, Rectifier failure, DC/DC converter failure, High
voltage shutdown, Fan failure, Thermal derating (of rectifier
output due to high temperature)
Model Part Number / Description
M820B 1M820BAXX / ACU+ controller
M821B 1M821BAXX / ACU+ controller
M820D 1M820DAXX / ACU+ controller
M821D 1M821DAXX / ACU+ controller
M820N 1M820NXX / ACU+ controller
Optional Interface Board
IB1 4 relay outputs, 4 digital inputs
IB2
EmersonNetworkPower.com/EnergySystems (North America)
EIB
EmersonNetworkPower.eu/EnergySystems (EMEA)
© Emerson Network Power Energy Systems North America 2012.
Business-Critical Continuity™, Emerson Network Power™, the Emer son Networ k Power logo, Em erson® and Consi der it Solved ar e service ma rks and trad emarks of Eme rson Elect ric Co.
EnergyMaster™, eSure™, NetPerform™, NetReach™, NetSpan™, NetSur e® and NetXtend™ are trad emarks of Eme rson Netwo rk Power Energ y Systems Nor th America .
8 relay outputs, 8 digital inputs,
2 temperatures
5 relay outputs, 8DC voltages,
3DC currents, 2 temperatures
2012.092
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