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Output wiring
SP-33: The SP-33 provides one set of isolated
SPDT relay outputs. If you are directly control-
ling a load (eg pump, blower, valve, etc), you must
connect a source of power through this output
relay. “NO” are normally open contacts which
close when the control output is on. “NC” are
normally closed contacts which open when the
control output is on. Refer to the sample diagrams
shown below.
SP-33D: The SP-33D provides two sets of iso-
lated SPDT relay outputs. If you are directly
controlling a load (eg pump, blower, valve, etc),
you must connect a source of power through these
output relays. “NO” are normally open contacts
which close when the control output is on. “NC”
are normally closed contacts which open when the
control output is on. Refer to the sample diagrams
shown below.
Installation
Installation
Installation
Installation
Installation
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