Grundfos LC 231 - Page 28

Enclosure class
IP54 / NEMA 3R.
Mains input terminal
Current: See nameplate.
IEC stranded or solid 0.5 to 16 mm
2
.
UL stranded or solid AWG 20 to 6.
Screw torque: 1.2 Nm.
Stripping length: 12 mm (0.47").
Pump output terminal
Current: See nameplate.
IEC stranded 0.75 to 2.5 mm
2
.
IEC solid 1.0 to 4.0 mm
2
.
UL stranded or solid AWG 18 to 12.
Screw torque: 1.2 Nm.
Alarm relay terminals
250 VAC nominal and 24 VDC nominal.
Nominal current 10 mA to 2 A AC/DC.
D300 pilot duty (auxiliary relay).
UL: solid AWG 28-12, stranded AWG 30-12.
IEC: solid or stranded 0.2 - 2.5 mm
2
.
Stripping lenght: 7-8 mm (0.28"-0.31").
Screw torque: 0.5 Nm.
Relay output 1 and 2
Minimum contact load: 10 mA AC/DC.
Potential-free changeover contacts.
IEC: solid or stranded 0.2 - 2.5 mm
2
.
UL: solid AWG 28-12, stranded AWG 30-12.
Stripping length: 7-8 mm (0.28"-0.31").
Screw torque: 0.5 Nm.
Digital input
IEC: solid or stranded 0.5 - 2.5 mm
2
, flexible 0.25 -
1.5 mm
2
.
UL: solid or stranded AWG 28-12.
Stripping length: 5-6 mm (0.19"-0.24").
Digital input mode
Low logic level below 1.8
V.
High logic level higher
than 2.7 V.
DIO terminals
Digital input mode
Low logic level below 1.8
V.
High logic level higher
than 2.7 V.
Digital output mode
Open collector.
Current sink capability:
maximum 75 mA, no
sourcing.
Overcurrent protected.
DIO terminals
Digital input mode
Low logic level below 1.8
V.
High logic level higher
than 2.7 V.
Digital output mode
Open collector.
Current sink capability:
maximum 75 mA, no
sourcing.
Overcurrent protected.
PTC
IEC: solid or stranded 0.2 - 2.5 mm
2
.
UL: solid AWG 28-12, stranded AWG 30-12.
Stripping length 7-8 mm (0.28"-0.31").
Screw torque: 0.5 Nm.
Trip resistance: greater than 2.2 kΩ +/-5 %.
Automatic reset resistance: less than 1 kΩ +/-5 %.
Pt100 or Pt1000 inputs (Pt)
Use Pt100 for short wires.
Use Pt1000 for long wires.
Solid or stranded wire: AWG 28-12 or maximum 2.5
mm
2
.
IEC: solid or stranded 0.5 - 2.5 mm
2
, flexible 0.25 -
1.5 mm
2
.
UL: solid or stranded AWG 28-12.
Stripping length: 5-6 mm (0.19"-0.24").
Power supplies, +24 V
Output voltage: 24 VDC - 10 % to + 10 %.
Maximum 250 mA on each terminal.
Weight
See nameplate.
Altitude
Maximum 2000 m (6562 ft).
Pollution degree
Category 3.
28
English (GB)