ABB Uvisor SF910i, Руководство пользователя, Страница: 37 / 190

The output goes to the “low” value of 3.5mA in case the SF910i detects a fault in any of
its internal parts.
Figure 2.6: Analog Output Wiring
2.2.5 Communication Lines
For SF910i-*-L, there is one communication line: galvanic isolated, half-duplex RS-485
serial communication.
The communication lines are based on the RS-485 serial communication physical level
standard. The transmission is differential; high-speed and long distance can be used on
a copper cable. See
Appendix A for cable length.
2.2.6 Configuration Memory
SF910i has a non-volatile internal memory that keeps configuration data indefinitely
during power-down periods. The data retention circuit needs no batteries, and it is based
on non-volatile memory technology.
In case of SF910i replacement, the new unit must be configured as the old one.
Easy configuration, reconfiguration, and tuning can be done with the Flame Explorer
software that, among the other features, allows the user to store any unit’s configuration
in a file that can be kept for reference or to reprogram a unit in case of replacement or
failure.
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2 Hardware
2.2 Display and Terminations Boards