Endress+Hauser Liquiphant FTL64 - Mounting Considerations for Process Conditions; Temperature Management for PFA Coatings; Switch Point and Viscosity Factors

Liquiphant FTL64
Endress+Hauser 13
DC connection, relay output (electronic insert FEL64 DC)
• Switches the loads via 2 potential-free changeover contacts
• Two 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
Observe the following as per 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 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 low DC current loads, 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
Terminal assignment
L+ L- 4
3 5
8
7
6
U = 9...20 V DC
!
0.5 A
1
2 2
L+ NO NONC NCC CL- PE
1 2 3 64 75 8
MIN
>0,7
MAX
>0,5
COM
A0037685
 9 DC connection with relay output, electronic insert FEL64 DC
1 When bridged, the relay output works with NPN logic
2 Connectable load