9
Signet 9900 Conductivity Transmitter
NO
NC
C
NO
NC
C
RELA
Y
2
RELA
Y
3
AC or DC
power
Valve
Flow
AC or DC
power
ALARM!
Relay Module wiring
The alarm is OFF during normal operation, and
will go ON when relay energizes according to
9900 Relay settings.
The valve is ON during normal operation, and
will go OFF when relay energizes according to
9900 Relay settings.
NO = normally open (closes when energized)
NC = normally closed (opens when energized)
Relay and Open Collector Wiring
Password Overview
The password is often required to start editing. Once entered correctly, this password will not be
needed for subsequent edits. However, once the menu system is exited,
the password will again be required when edit mode is re-entered.
Your choice of password (STD or CODE) is selected in the Options Mode.
●
STD
The standard (STD) password is
▲▲▲▼
, pressed in sequence. This password is designed
to protect the 9900 from unintentional changes. It is best suited for systems where a group of
people need to be able to change settings.
●
CODE
The CODE default setting is 0000, adjustable to any 4-digit numerical code up to 9999. Using
a personal code provides the maximum degree of security.
This code can be modi
fi
ed in the Options mode.
