Grundfos LC 231 Manual Del Usuario página 9

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. Loosen the screws and remove the front cover.
Be careful not to damage the cable between the
front cover and the back cover.
2. Lead the wires through one of the cable glands.
3. Depending on the type of wire, take one of the
following actions:
• For a shielded wire, lead it through the cable
clamp.
CIO1
• For a not shielded wire, attach it to the
protection cover with a cable tie.
DIO1 GND DIO2 GND DI1
CIO1 GND CIO2 GND 24V
4. Depending on the type and function of the
sensor, connect the wires to the following
terminals. When using an analog sensor, level
switches can be used to add redundance or
security by adding an extra dry-run sensor or
high-level sensor or both.
Related information
2.2.1 Removing the front cover
3.6 Configuring the IO terminals using Grundfos GO
Remote
GND
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.
Default settings of the terminal blocks
Terminal block
Alarm 1
GND DI2 GND
Alarm 2
1. Loosen the screws and remove the front cover.
Be careful not to damage the cable between the
front cover and the back cover.
2. Lead the wires through one of the cable glands.
GND 24V GND
Sensor Sensor
Terminals
type function
CIO1 - GND - 24
Analog All levels
V
Dry-running
CIO2 - GND
level
Stop level DIO1 - GND
Digital Start level,
DIO2 - GND
pump 1
Not in use DI1 - GND
High level DI2 - GND
Default function
All alarms
High level
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