Page 794 - Din prodcuts 2020

8/54 ELECTRICAL INSTALL ATION SOLUTIONS FOR BUILDINGS 2CHC 420 001 C0201

—
Energy efficiency

String monitoring CMS-660

Circuit monitoring system for PV applications
The CMS string monitoring increases the efficiency of photovoltaic systems
by detecting failures on PV strings. With the easy-to-integrate system you can im-
mediately detect unusual system status, e.g. defective strings, over-voltages,
breaker trips or high temperatures, enabling you to quickly implement
appropriate countermeasures.
String
Key features:
• Current and temperature measurement directly from the sensors
• Monitoring of two strings can be combined into one single CMS solid-core sensor
Inverter • Integration of SPD and Switch disconnector status via 2 digital inputs
• Up to 32 flexible monitoring points, placed where measurement is required
• LEDs provide local information about network and device status.
8
• Modbus RTU protocol guarantees easy integration into plant or inverter moni-
toring systems
• Connection technology is extremely simple and requires no special tools
Combiner
Control unit – CMS-660
Main technical specification CMS-660
General data
Degree of protection IP20
Operating temperature [°C] − 25 .. +70 °C
Storage temperature [°C] − 40 .. +85 °C
Dimensions W / H / D [mm] 71.8 x 87.0 x 64.9 (4 modules)
Screw-type terminals 0.5…2.5 mm², max 0.6 Nm
Altitude [m] ≤ 2000 m
Insulation strength [VAC] 400
Installation on DIN-rail 35 mm (DIN EN 50022)
Reference standards IEC 61010-1 UL | 508/CSA C22.2 No. 14
Supply
Supply voltage [VDC] 24 (±10%)
Power Input [W] 0.5 - 11 (dep. on n. of sensors)
Serial interface (RS-485)
Serial transmission speed 2.4 … 115. 2 kbps
Cable type Twisted, shielded
Communication protocol Modbus RTU
Measuring inputs
Max. number of sensors 32
Refresh time ≤1 sec with max 32 sensors
Digital inputs 2
Connection method Push-in spring connection
Cable diameter max. 0.5mm²
Electrical characteristics for potential-free contact
Micro USB port 1

Control Unit
Description Weight of 1 Unit conf.
Type ABB code unit (kg) (Pcs)
CMS-660 control unit CMS-660 2CCA880020R0001 0.153 1