Endress+Hauser Liquiphant FTL51B - DC Connection with Relay Output (FEL64 DC)

Liquiphant FTL51B Electrical connection
Endress+Hauser 23
Behavior of switch output and signaling
3 54
3 54
6 87
6 87
3 54
3
3
5
5
4
4
6 87
6
6
8
8
7
7
MAX
RD YE GN
MIN
A0033513
 24 Behavior of switch output and signaling, electronic insert FEL64
MAXDIP switch for setting MAX safety mode
MIN DIP switch for setting MIN safety mode
RD LED, red, for alarm
YE LED, yellow, switch status
GN LED, green, operational status, device on
6.2.4 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 with the
housing closed.
Supply voltage
U = 9 to 20 V
DC
Pay attention to 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 power 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 sum of the voltages of the 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