Endress+Hauser Liquiphant FTL41 Brief Operating Instructions page 16

Electrical connection
Behavior of the switch output and signaling
MAX
MIN
 15 FEL42 switching behavior, signaling LED
MAX DIP switch for setting the MAX safety
MIN DIP switch for setting the MIN safety
RD LED red for warning or alarm
YE LED yellow, switch status
GN LED green, operational status, device on
I Load current switched through
L
6.3.2 Universal current connection with relay output (electronic insert FEL44)
• Switches the loads via 2 potential-free change-over contacts
• 2 separate change-over contacts (DPDT)
WARNING
L
An error at the electronic insert can cause the permitted temperature for touch-safe
surfaces to be exceeded. This presents a risk of burns.
‣
Do not touch the electronics in the event of an error!
Supply voltage
U= 19 to 253 V / 19 to 55 V
AC
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.
16
RD YE GN
L+
L+
L+
L+
L+
DC
I
L
1 3
ΔU
<100 µA
1 3
I
L
1 3
ΔU
<100 µA
1 3
<100 µA
3
1
Liquiphant FTL41
(L–)
K
(L–)
K
(L–)
K
(L–)
K
(L–)
K
A0033508
Endress+Hauser