Connecting An Alarm Device - Grundfos LC 241 Montage- Und Betriebsanleitung

Contactor
Overload
Relay
Protective Earth
Three-phase connections for two pumps without neutral, for Norway
only
Related information
8.2 Code 2 (Power phase missing)
8.4 Code 9 (Power phase sequence wrong)
8.16 Code 181 (Signal fault, PTC input)
2.3.4 Connecting a level sensor
You can either connect an analog level sensor, such as a pressure
sensor, or a digital level sensor, such as a float switch.
1. Lead the wires through one of the cable glands and the cable
tray.
2. Depending on the type of cable, take one of the following
actions:
• For low-voltage cables, lead the wires through the right side
of the cable tray.
• For signal cables that in the event of an insulation fault can
obtain high-voltage potential, lead the wires through the left
side of the cable tray.
3. Depending on the type and function of the sensor, connect the
wires to the following terminals:
10
IO242
Contactor
Overload
Relay
Sensor type Sensor function
Analog All levels
Dry-running level
Stop level
Digital Start level, pump 1
Start level, pump 2
High level
Related information
3.6 Configuring the IO terminals using Grundfos GO Remote

2.3.5 Connecting an alarm device

You can connect an alarm device, such as a buzzer or a lamp, to
the output relays Alarm 1 and Alarm 2. The control unit triggers the
alarm device when it detects an alarm or a warning. You can
change the behaviour of the outputs with Grundfos GO Remote
under Relay output 1 and Relay output 2.
You can also set the alarm device to be activated during normal
operation. It will only be deactivated in case of an alarm, a warning,
or mains failure. The setting is made in Grundfos GO Remote.
Go to Settings > IO 242 > Relay output > Function.
Default settings of the terminal blocks
Terminal block
Alarm 1
Alarm 2
1. Lead the wires through one of the cable glands and the cable
tray.
2. Depending on the type of wire, take one of the following
actions:
• For low-voltage cables, lead the wires through the right side
of the cable tray.
• For signal cables that in the event of an insulation fault can
obtain high-voltage potential, lead the wires through the left
side of the cable tray.
3. Depending on the type of alarm device, connect the wires to
the relevant terminals. Note that all wires must be secured
inside the cabinet using cable ties.
• NO (Normally Open) and C (Common)
• NC (Normally Closed) and C (Common).
Terminals
ADI - GND - 24 V
DI1 - GND
DI2 - GND
DI3 - GND
DI4 - GND
ADI - GND
Default function
All alarms
High level