Device description SICAM MMU (Measurement and Monitoring Unit) is a power monitoring device that measures electrical quantities in power supply system. SICAM MMU is used in industrial plants, power plants and substations to measure and calculate parameters (e.g. current, voltage, power, phase angle, harmonics, energy or frequency) and forward these measured values to network control systems (SCADA, DMS, EMS etc.) via IEC 60870-5-104 or to automation systems via MODBUS where they can be further processed and visualized. Major characteristics of SICAM MMU • Compact and rugged design • Over 100 measured or calculated values available • Temperature range: -25 °C to +55 °C / -13 °F to 131 °F • Measuring accuracy: 0.1 % deviation for rated input voltage and rated input current according to IEC 60688 and 0.2 s according to IEC 62053-21 • High EMC immunity: according to the requirements of EN 61000-62 and EN 61000-6-4 for the EMC directives and the requirements of EN 61010-1 for the low-voltage directive • UL certification according to UL 61010-1 standard • Flexible current measuring range (up to 2 x In) • 2 individual binary outputs for fast switching, indications (e.g., limit violation) and operation status monitoring • 4 LEDs for local status visualization • Ethernet communication via IEC 60870-5-104 or MODBUS TCP protocols • Internal battery to power the real-time clock and save the energy counter values in case of auxiliary voltage failure • Real-time clock (RTC), field bus synchronization or network synchronization possible via NTP Application • Equipping secondary substations with measurement instrumentation and communication link • SICAM MMU is used at power utilities as well as industrial and commercial applications • Connection in 1-phase systems, in 3-wire and 4-wire systems Customer benefit • Reliable and cost efficient support of power system management and planning by measurements from distribution systems • Reduced cabling through Ethernet • Real-time data transmission via mobile communications (e.g. GPRS, UMTS) through reduced data rate • User-friendly operation through Web Server (no extra software for parameterization needed, no converters an

Device characteristics Housing specification • DIN rail mounting device • Plastic case 96 mm x 96 mm x 100 mm/ 3.78 in. x 3.78 in. x 3.94 in. (W x H x D) • Degree of protection: IP20 Input and output circuits • 4 inputs for alternating voltage measurements • 3 inputs for alternating current measurements up to 10 A continuous current • Individually programmable binary outputs Signalization LEDs • To automatically monitor the functions of hardware, software, and firmware components Communication • Ethernet: IEC 60870-5-104 or MODBUS TCP communication protocol Measurands • The following measurands...