Remote Input
An external switch with voltage free contacts such as a tank level switch or a set
of external relay contacts can be used to either start or to start and stop a pump
under the control of the F60. The supply to the external switch must be taken
from the (LV) terminal (Low Voltage active terminal) of the F60 when the controller
is powered from the mains or from a 24VAC source. The F60 must always be
powered from the same source as the supply to external switch. The supply to
the remote switch on the F60-12 (low voltage DC model) must be taken from the
supply positive terminal. In all cases the external switch return wire must be
connected to the Remote input (R) terminal on the F60. The Supply to the external
switch will range from 12 to 24 VDC or from 20V to 35V AC depending on the
model of the controller and on the supply voltage.
WARNING
The low voltage source available at the LV terminal is non-
isolated and in terms of insulation must be regarded as operating at full
mains potential whenever the F60 is powered from the mains.
The remote switch can be installed some distance from the F60. The maximum
distance is limited by cable resistance and capacitance. The total cable resistance
must not exceed 5K Ohms with the remote switch closed. The total capacitance
of the cable must not exceed 25nF with the remote switch open. Wires to the
remote switch should be run separately from power carrying cables. Do not run
the remote switch wires in a conduit that also contains power cables. Capacitive
coupling between the adjacent cables may cause false triggering of the F60’s
remote input. For cable runs longer than 150 meters we suggest using 2 separate
wires to reduce capacitive coupling between the adjacent wires. When set up this
way cable resistance becomes the limiting factor for distance. The table below
sets out the resistance of typical copper wire of various diameters.
20
Note:
Resistance may vary depending on the wire standard and the actual
construction of the wire.
Remote Input
Resistance in Ohms per 1000
Meters
0.2
95.30
0.5
36.20
0.75
24.13
1.0
18.10
1.5
12.10
Summary of Contents for F60
Page 11: ...ALIGNING THE PADDLE ASSEMBLY 8...
