Hanna Instruments hi 9914 User Manual
17
Water nozzle, Circulation and Feeding pump connection
The Water nozzle, Circulation pump and Feeding pump outputs are
relay type (2A, 240V). Both the
The Water nozzle, Circulation pump and Feeding pump outputs are
relay type (2A, 240V). Both the
NO (normally open) and NC (normally
closed) contacts are available to the user. If the device is off, the
COM-
MON pin is connected to corresponding NC pin. If the device is on, the
COMMON pin is connected to the NO pin.
COMMON pin is connected to the NO pin.
• Connect one pin of the source to the
COMMON pin.
• Connect the device between the
NO pin and the remaining source pin.
Alarm connection
The Alarm output is relay type (2A, 240V). Both the NO (normally open)
and NC (normally closed) contacts are available to the user. If the alarm
is off, the COMMON pin is connected to the NC pin. If the alarm is off, the
COMMON pin is connected to the NO pin.
The Alarm output is relay type (2A, 240V). Both the NO (normally open)
and NC (normally closed) contacts are available to the user. If the alarm
is off, the COMMON pin is connected to the NC pin. If the alarm is off, the
COMMON pin is connected to the NO pin.
• Connect one pin of the source to the
COMMON pin of the alarm
output.
• Connect the alarm device between the
NO output pin and the
remaining source pin.