3
panel to allow room for wires to clear all internal components.
Do not make connections
through the back of the control box
. All connections and conduit hubs must be of the type
which will maintain the correct NEMA rating of your unit.
All connections are to be made directly to the terminal block located inside the Failsafe unit;
these terminals are clearly marked and assigned on the electrical drawings attached to the door.
Make all the connections between the actuators and the Failsafe unit. When connecting the
limit
switches
be sure that you have selected a set of contacts that
will
close
when the actuator has
reached a
FULLY OPENED
or
FULLY CLOSED
position after power failure. Failure to
select the correct set of contacts will prevent the Failsafe unit from automatically disconnecting
after the actuators have reached the failsafe position.
3.1. – AUTO / TIMED UPS shut down
The 1620ES-24VDC series includes an option that allows the system to
be shut down in
AUTO
or
TIMED
mode.
AUTO
MODE
requires that a Limit Switch from the valve actuator be
connected to the controller for the system to shut down automatically
after power failure.
TIMED
MODE
should be used only when the valve actuator does not
have an available limit switch.
To enable this option, jumpers
J1
and
J2
must be moved from pins
1-2
to pins
2-3
. Once enabled, the time available for a shut down after a
power failure is selected with the potentiometer
P3
, the minimum time
is factory set at 4.5 minutes (P3 set fully to the left) and the maximum
possible time to select is of 12.5 minutes (P3 set fully to the right).
Longer times are available and should be requested when ordering.
Regardless of the mode selected, this controller has an
LED
above
P3
that will be ON when the
failsafe has been shut down after a power failure, and it will remain ON until normal power is
restored.
The battery included with this Failsafe unit was sized to operate a specific system for a specific
amount of time. If it is not disconnected from the valve it will fully discharge the battery after
activation.
Ensure that all the electrical connections are made according to the drawings and schematics
provided by the actuator manufacturer. If more than one actuator is to be controlled by the
Failsafe, each one should be connected to the assigned terminal block inside the Failsafe unit.
