Liquipoint T FTW 31, FTW 32
Endress + Hauser 7
Fail-safe mode
Selecting the correct fail-safe mode ensures that the relay always runs in quiescent current
fail-safe.
•
Maximum fail-safe: the relay de-energises when the switch point is exceeded
(probe covered), a fault occurs or the power supply fails.
•
Minimum fail-safe: the relay de-energises when the switch point is undershot
(probe uncovered), a fault occurs or the power supply fails.
Measuring ranges
A total of four measuring ranges (100 Ω; 1 kΩ; 10 kΩ; 100 kΩ) can be set via two DIL switches
(SENS). The setting on delivery is 100 kΩ.
L00-FTW3xxxx-15-05-xx-xx-001
Switching delay
A switching delay of 2.0 s can be activated or deactivated via a DIL switch.
If the switching delay is set to 0 s, the device switches after approx. 0.3 s.
Signal on alarm
Output signal in the event of a power failure or a damaged probe: relay de-energised.
Load
Loads are switched via 2 potential-free change-over contacts.
I~ max. 4 A, U~ max. 253 V;
P~ max. 1000 VA, cos ϕ = 1, P~ max. 700 VA, cos ϕ > 0.7;
I– max. 4 A to 30 V, I– max. 0.2 A to 150 V.
When connecting a functional extra-low voltage circuit with double insulation in accordance with
IEC 1010: the sum of the relay output and power supply voltages is max. 300 V.
Galvanic isolation
All input channels, output channels and relay contacts are galvanically isolated from each other.
MAX
MIN
2 s
0 s
SENS = 100 - 100kΩΩ
100 Ω
1 kΩ
10 kΩ
100 kΩ
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