WM20 Power analyzer for three-phase systems Benefits Clarity. The wide backlit LCD display clearly shows the measurements and the configuration parameter values. Simplicity. The rotating pages function automatically shows all measurements in sequence without having to use the keypad. An optical port is available for quick analyzer configuration using OptoProg (CARLO GAVAZZI). Specific software. WM20 can be configured and measurements viewed from UCS configuration software (CARLO GAVAZZI). The software and subsequent updates are free. Scalability. Two accessory modules can be added to WM20 according to need. This way, the analyzer extends its control capacities and communicates data remotely. Communication flexibility. The communication module is available in Modbus RTU, Modbus TCP/IP, BACnet IP, BACnet MS/TP and Profibus DP V0 versions. Fast installation. WM20 and accessory modules are all equipped with detachable terminals. Modules can be quickly installed via the specifically designed fast Description coupling pins. Tamper-proof. WM20 configuration access can be WM20 is a modular power analyzer for single-, locked. Terminals and accessory modules can be sealed. two- and three-phase systems. Installation flexibility. WM20 is suitable for single- phase, two-phase, three-phase and wild-leg systems. It is made up of a maximum of three components: the main unit that displays measurements on the LCD display and manages two alarms, and two accessory modules, one with digital outputs and the other for communication. The digital output module associates alarms with static or relay outputs and/or transmits pulses proportional to energy consumption. The communication module allows you configure the analyzer and transmit data using a different communication protocol according to the version. Applications WM20 can be installed in any switchboard to control energy consumption, main electrical variables and harmonic distortion. In automation, WM20 can use the communication module with Profibus protocol to both communicate data on consumption to supervision systems and manage them independently if installed on a machine. In building, WM20 can be installed in existent architectures using the communication module with BACnet protocol (on RS485 or Ethernet). 04/03/2019 WM20 DS ENG Carlo Gavazzi Controls S.p.A. 1WM20 Main functions Measure main electrical variables and voltage and current harmonic distortions Measure active and reactive energy Measure load operating hours Manage up to two alarms Manage two digital outputs (via optional accessory module) Transmit data to other systems (via optional accessory module) Components Module Description Main unit, measures and displays main electrical variables. With LCD display and WM20 touch keypad, it lets you set measurement parameters, configure accessory mod - ules and manage up to two alarms. Accessory module with two digital outputs. Expands main unit capacity, specifically allowing you to: Digital outputs (optional) Transmit pulses proportional to energy consumption Control digital outputs (static or relay according to the module) Accessory module that lets you transmit data to other systems or configure the Communication (optional) analyzer from remote Compatible accessory modules Type Module description Code Double static output M O O2 Digital outputs Double relay output M O R2 Modbus RTU communication on RS485/RS232 M C 485232 Modbus TCP/IP communication on Ethernet M C ETH Communication BACnet IP communication on Ethernet M C BAC IP BACnet MS/TP communication on RS485 M C BAC MS Profibus DP V0 communication on RS485 M C PB Possible configurations WM20 only WM20 + 1 module WM20 + 2 modules WARNING: maximum 1 module per type. In the configuration with 2 modules, the communication module is installed last. 04/03/2019 WM20 DS ENG Carlo Gavazzi Controls S.p.A. 2