Endress+Hauser Liquiphant FTL41 Brief Operating Instructions page 20

Electrical connection
Power consumption
S < 25 VA, P < 1.3 W
Connectable load
Loads switched via 2 potential-free changeover contacts (DPDT)
• I ≤ 6 A (Ex de 4 A), U~ ≤ AC 253 V; P~ ≤ 1 500 VA, cos φ = 1, P~ ≤ 750 VA, cos φ > 0.7
AC
• I ≤ 6 A (Ex de 4 A) to DC 30 V, I
DC
According to IEC 61010, the following applies: Total voltage from relay outputs and power
supply ≤ 300 V.
Use electronic insert FEL42 DC PNP for small DC load currents, e.g. for connection to a PLC.
Relay contact material: silver/nickel AgNi 90/10
When connecting a device with high inductance, provide a spark suppressor to protect the
relay contact. A fine-wire fuse (depending on the connected load) protects the relay contact in
the event of a short-circuit.
Both relay contacts switch simultaneously.
Behavior of output signal
• OK status: relay energized
• Demand mode: relay de-energized
• Alarm: relay de-energized
20
≤ 0.2 A to 125 V
DC
Liquiphant FTL41
Endress+Hauser