CIRCUTOR CIRWATT-B410T Series - Manual (Page 16)

THREE PHASE STANDARD CIRWATT B METER
CIRWATT B THREE PHASE INSTRUCTION MANUAL 16 / 53
1.13.3.- Version with leakage current measurement
The meter will feature an input for connecting an external transformer from Circutor's WN
series, which will allow for the reading of the differential (leakage) current existing in the
installation.
1.13.4.- Version with Optocoupler output
The meter could have a optocoupler output card to send pulses related with the energy read
by the meter. The maximum voltage is to apply is 24 V d.c.
1.14.- Real-time clock
The meter features a real-time clock able to maintain the date and time with a loss of accuracy
of less than 0.5 seconds/day, as specified by the UNE EN 61038 standard.
The clock maintains this precision both when powered using the electricity network and when
using its own battery.
1.15.- Reserve power
The meter is equipped with a battery that allows the real-time clock to continue running. This
battery is non-removable and is designed to provide energy for a period of 5 years whilst the
meter is otherwise without power. When the meter is powered as normal, the battery
consumption is practically zero. The use of laser-sealed batteries ensures minimum auto-
discharge, making it possible to guarantee the battery for the 20 years of service life of the
meter.
1.16.- Optical communication port
The equipment, in all the different versions, features an optical serial communications port, in
accordance with the UNE IEC 62056-21:2003 standard. The communications port is fully
compatible with the optical ports approved by the major electricity companies.
The surface of the cover includes a profile for the correct fastening and placement of the
optical ports.
1.17.- PLC communication port (depending on model)
The Cirwatt Type B meter can be fitted with an advanced communications system for
communicating over the electrical distribution network (PLC). This system allows meters to be
networked without the need for extra wiring, with the subsequent cost savings in the reading
processes and the ability to carry out remote management. It is based on DCSK modulation
and a series of repeaters.
1.18.- RS232-RS485 Communication ports
The meter can be fitted with RS232 or RS485 serial communications. Up to two totally
independent channels, with speeds from 9600 up to 38400 baud, can be made available.