Tip:
Highlight text to annotate it
X
HI, I'm Jim, Senior Engineer at Sangamo and in this video I will explain
the main differences between the S250
and the Q550 series 3 and 4 pin time switches
and how
they should be wired
first of all, the term 3-pin and 4-pin
the stands for the connection pins
on the back of the time switch
so if we remove the mechanism
so that you can see the back
and you can see
connection pins located here
and of corresponding terminal positions within
it's base
these are numbered on
the actual plastic starting
on the left hand side
with terminal number 1
if we start with 3-pin time switches
these are for 230 volt applications only
where a common live supply is being used to operate the clock and also provide an
input for the switching circuit
in terms of wiring
you would have a 'live in' to terminal 1
a 'live out'
to terminal 3
all 'neutral' connections
to terminal 2
and lastly
you would have an 'earth'
to the side connection. This, the product
must have an 'earth' connection
and that's the wiring
for a 3-pin
time switch
if we look at 4-pin time switches now
these have independent clock
and switch connections
which enable a different
AC
switching circuit voltage to be controlled from that of the 230 volts
required to run the clock
for instance
you may wish to switch a 110 volt AC machine
essentially, you've got a volt free AC contact
and you can also isolate
the switching circuit
independant
of the supply to the clock
so in terms of the actual
wiring of it
terminal 3
is your 'live in' to the clock
terminal 1 is the 'live in' for the switching circuit
terminal 2 is your 'live out'
to your load
terminal 4 is for 'neutrals'
and you've got
again you've got the essential 'earth'
into the side
of the unit
if you have a 4-pin
device
but only one supply, then one way to get round it is to
fit a link
and you wouldn't have
an independent supply for the switching circuit but instead you would link
from the clock live
through to
terminal 1, so you would link from terminal 3
through to terminal 1
and you're now using
the same live supply
that's being used for the clock
and you're using that
for the switching circuit aswell
lastly, there's a special 4-pin
time switch
model Q563
this has a changeover contact enabling you to switch between 2 outputs, for instance
2 machines
the wiring is therefore different to normal 4-pin time switches
and, similar to the 3-pin, requires a common live supply to operate the clock
and also provide
an input for the switching circuits
in terms of wiring
you have a 'live in' to terminal 1
and you have
a 'live out'
from terminal 2 to your 20 amp rated
lever A
circuit
you have a 'live out'
from terminal 3 to your 10 amp
lever B
circuit
all 'neutrals' go into
and finally, again, you have an 'earth into the side
so I hope that's been of help
for more 'how to' video's please visit our website at
sangamo.co.uk thank you.