19
6 Setup
OPTISWITCH 3100 C • Relay (DPDT)
29953-EN-210702
For instruments detecting solids in water, these settings are not ap-
plicable. The density range is preset and must not be changed.
With the mode setting (min./max.) you can change the switching
condition of the relay. You can set the required mode according to the
"
Function table
" (max. - max. detection or overflow protection, min. -
min. detection or dry run protection).
We recommend connecting according to the idle current principle
(relay contact deenergizes when the switching point is reached),
because the relay always takes on the same (safe) state if a failure is
detected.
Control lamp for indication of the switching status
•
green = relay energized
•
red = relay deenergized
•
red (flashing) = failure
6.3 Function table
The following table provides an overview of the switching conditions
depending on the set mode and the level.
Level
Switching status
Control lamp
Mode of operation max.
Overflow protection
5
3
4
(8)
(6) (7)
Relay energized
Green
Mode of operation max.
Overflow protection
5
3
4
(8)
(6) (7)
Relay deenergized
Red
Mode of operation min.
Dry run protection
5
3
4
(8)
(6) (7)
Relay energized
Green
Mode of operation min.
Dry run protection
5
3
4
(8)
(6) (7)
Relay deenergized
Red
Failure of the supply volt-
age
(min./max. mode)
any
5
3
4
(8)
(6) (7)
Relay deenergized
Mode adjustment (2)
Signal lamp (5)
