Diehl Metering SCYLAR INT 8, Installation And User Manual

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3.5.3 Mains unit
The mains unit indicates to the calculator if mains voltage is present. If the mains unit fails, the back-
up battery (CR2032) in the mains unit provides the power supply for up to 1 year. This back-up battery
can be replaced if necessary. The LCD readings (on pressing button) and the date and time are still
updated, but none of the measuring functions work, incl. the flow rate measurement. Communication
still functions over the optional M-Bus, RS485 and RS232 modules or the optical interface, but this
reduces the life of the back-up battery. The integrated radio function is switched off in the event of
mains failure.
3.6 Calculator interfaces
The calculator is equipped as standard with a ZVEI optical interface. This is located on the calculator
below the display (Fig. D). This interface can be used for communication with the calculator (using the
IZAR@Mobile2 software) and for checking it.
Communication uses the M-Bus protocol, for which the Bluetooth IZAR OH BT opto head is suitable.
Fig. D Front of calculator
1 Optical ZVEI interface
1