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Control Relay
Control Relay Configuration
The ST535 has a relay output that can be configured (see installation instructions) as
an event output, a damper control output, a fan control output or not used.
Event Output
The event relay can be programmed to change state at the start of a ramp and also at
the start of a soak period. Thus both ramp and soak events are possible. The event
output is ON (relay contacts are closed) when the event icon is lit. Prior to running a
program the event output is OFF (relay contacts are open). The event output status is
stored with the firing program.
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While displaying a ramp rate the event output
can be switched on or off by holding in the fn
key then pressing the ► (event) key. The event
output will be ON when the event lamp is on.
While displaying a soak period the event relay
can be switched on or off by holding in the fn
key then pressing the ► (event) key. The
event output will be ON when the event lamp is
on.
ST535 User Handbook
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