DC Power forBusiness-Critical Continuity™Standard Control Unit (SCU+)

Controller, SCU+M521B, M522B, M523B, M221B

The next generation Standard Control Unit (SCU+) is a powerful control unit used in DC power applications. The SCU+ enables remote monitoring of the telecom site's AC mains supply, DC power plant, battery backup, site environment, etc.

The SCU+ enables advanced battery management such as sophisticated boost charge control, remaining time prediction, constant current test, scheduled test and fast test. Furthermore, with basic energy saving function, the SCU is surely a cost-efficient product.

The information and alarms, from a specific site, can be monitored or checked by means of a simple web browser or special monitoring software. When using a web browser, no additional software is needed and the web browser login monitor the site is password protected.

Designed for global use, the SCU withstands high telecom standards, and provides great reliability and availability.

Features and Benefits■ Flexible and scalable to satisf y your

present and future needs■ Minimized installation time as a result of

easily configurable file upload/download■ Sophisticated boost charge management

gives long battery life-span■ Automatic battery test including advanced

scheduled test / constant test / fast test■ High quality failure information due to

intelligent alarm setup through using PLC1

■ Lower operating cost due to energy saving standby function for rectifier

1PLC = Programmable Logic Controller

Description

M221B

M521B

M522B

M523B (without Ethernet & RS232 Port )

DC Power forBusiness-Critical Continuity™

Business-Critical Continuity, Emerson Network Powerand the Emerson Network Power logo are trademarks

and service marks of Emerson Electric Co.©2008 Emerson Electric Co.

Emerson Network Power.The global leader in enablingBusiness-Critical Continuity™

AC Power

Connectivity

DC Power

Embedded Computing

Embedded Power

Monitoring

Outside Plant

Power Switching & Controls

Precision Cooling

Racks & Integrated Cabinets

Services

Surge Protection

Standard Control Unit (SCU+)

2008.11

Technical Specifications, SCU+

M521B M522B M523B M221B

Display LCD with 8X16 characters No display

Communication Interface RS232, Ethernet RS 232 RS232, Ethernet

Protocol

HTTP, SNMP √ √ √

YDN23, EEM, SocTpe, Rsoc

√ √ √ √

Inputs

Analog

2 battery currents, 1 load current, 1 bus voltage, 1 battery

voltage, 2 temperatures, 3 AC voltages

2 battery currents, 1 load current, 1 bus voltage, 1 battery voltage, 2 temperatures

Digital

12 load fuses, 6 battery fuses, 2 bi-stable

contactor statues, 2 user inputs

2 load fuses, 2 battery fuses,2 bi-stable contactor statues, 2 user inputs

Outputs2 LVD mono or bistable contactors, 2 user relay

outputs2 LVD mono or bistable contactors, 2 user relay outputs

Ethernet port

RS232 port

LCD

Green: Operating

Red: Major or critical alarm

Functional keys

Yellow: Minor alarm

Ethernet port

RS232 port

Green: Operating

Red: Major or critical alarmYellow: Minor alarm

M221B

M521B

M522B

M523B (without Ethernet & RS232 Port)

GeneralPower Supply 19 to 60VDCPower Consumption 5WOperating Temperature Range - 40℃ to + 75℃/- 40℉ to + 167℉Relative Humidity 0 to 90%EMC EN 300 386, 2001 class B, FCC part 15 class BSafety IEC 60950 -1, EN 60950 -1, UL 60950 -1Approvals CE, UL and NEBS level 3

Mechanical DataDimensions(H×W×D) 86.6×42×211.5mm/34.09×16.5×83.28inchStandard Installation Methods Hot pluggable in stand-alone or embedded power plantsWeight < 0.8 kg / 1.76 Ibs

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)

Inputs/Outputs

Ordering InformationDescription Product Name Product Code

Controller (SCU+) M521B 1M521BAXX M522B 1M522BAXX M523B 1M523BAXX M221B 1M221BAXX

Emerson Network Powerwww.emersonnetworkpower.comwww.emersonenergy.com (Energy Systems, Europe) www.emersonnetworkpower.com/energysystems (Energy Systems, North America)