Endress+Hauser Liquiphant FTL64, Руководство по эксплуатации

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Liquiphant FTL64 Electrical connection
Hauser 25
6.3.4 DC connection, relay output (electronic insert FEL64 DC)
• Switches the loads via 2 potential-free change-over contacts
• 2 galvanically isolated change-over contacts (DPDT), both change-over contacts switch
simultaneously
• Functional testing without level change. Functional testing of the entire device can be
performed using the test button on the electronic insert or with the test magnet (can be
ordered as an option) with the housing closed.
Supply voltage
U = 9 to 20 V
DC
Comply with the following according to IEC/EN61010-1: provide a suitable circuit
breaker for the device and limit the current to 500 mA, e.g. by installing a 0.5 A fuse
(slow-blow) in the power supply circuit.
Power consumption
P < 1.0 W
Connectable load
Loads switched via 2 potential-free changeover contacts (DPDT)
• I
AC
≤ 6 A (Ex de 4 A), U~ ≤ AC 253 V; P~ ≤ 1 500 VA, cos φ = 1, P~ ≤ 750 VA, cos φ > 0.7
• I
DC
≤ 6 A (Ex de 4 A) to DC 30 V, I DC ≤ 0.2 A to 125 V
According to IEC 61010, the following applies: Total voltage from relay outputs and power
supply ≤ 300 V
Preferably use electronic insert FEL62 DC PNP for small DC load currents, e.g. connection
to a PLC.
Relay contact material: silver/nickel AgNi 90/10
When connecting a device with high inductance, provide spark quenching 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.
Behavior of output signal
• OK status: relay energized
• Demand mode: relay de-energized
• Alarm: relay de-energized
Terminals
Terminals for cable cross-section up to 2.5 mm 2 (14 AWG). Use ferrules for the wires.
Overvoltage protection
Overvoltage category II