15
Instruction Manual
CIRWATT B 400
2�13 - REAL-TIME CLOCK
The meter has a real-time clock capable of keeping the date and time with a drift of less than 0.5
seconds/day, as specified in the UNE EN 61038 standard.
The clock maintains this accuracy whether it is powered from the mains or by its own battery.
2�14 - RESERVE POWER
The meter has a battery that allows the clock to remain operational in real time. This battery is not
removable and is sized to supply power for 5 years without plugging in the meter. When the meter is
plugged in, the battery consumption is zero. The use of laser-sealed batteries minimises the amount
of self-discharge, which makes it possible to guarantee the battery for the 20 years of the meter's
useful life.
2�15 - OPTICAL COMMUNICATIONS PORT
Every version of the device has an optical serial communications port, as per the IEC
62056-21:2003
standard. The communications port is fully compatible with the optical ports approved by the leading
electricity companies.
On the surface of the cover there is a profile for properly attaching and placing the optical heads.
2�16 - PLC COMMUNICATIONS BLOCK (OPTIONAL DEPENDING ON VERSION)
The
CIRWATT Type B
can be equipped with an advanced communications system through the electrical
distribution network (PLC). This system allows the meters to be connected to the network without the
need for extra wiring, with the consequent cost reduction in the reading process and the option of
telemanagement. It is based on DCSK modulation and contains a repeater system.
2�17 - RS-232/RS-485 COMMUNICATIONS BLOCK (OPTIONAL DEPENDING ON VERSION)
The meter can have RS232 or RS485 serial communications. Up to two completely independent
channels may be available, with speeds of 9600 to 38400 bauds.
2�18 - ETHERNET COMMUNICATIONS BLOCK (OPTIONAL DEPENDING ON VERSION)
The
CIRWATT Type B
can be connected to an Ethernet network, thus providing direct access to the
meter via IP.
2�19 - RESET
Locally, the device can be reset to the initial factory conditions
