Red Lion TSC - Manual (Page 37)

ALARM MODULE (4-AL) (OPTIONAL)
The controller may be optionally fitted with the dual alarm option (AL1 and
AL2), or a single alarm with the cooling output option (AL1 and OP2). One of
three types of output modules (Relay, Logic/SSR Drive or Triac) must be
ordered separately and installed into the alarm channel socket.
Note: Units with RS-485 serial option must have the same type of modules
installed for the Dual Alarms setup.
The output modules may be replaced or interchanged (with appropriate
wiring considerations) at any time without re-programming the controller.
With an open sensor, the alarm outputs are up-scale drive (+9999) and with a
shorted sensor (RTD only) they are down-scale drive (-9999).
A front panel annunciator illuminates to indicate that the alarm output is on
(AL1 for alarm 1 and AL2 for alarm 2).
Note: When deviation low-acting with positive alarm value (d-LO), deviation
high-acting with negative value (d-HI), or Band inside-acting (b-IN) is
selected for the alarm action, the indicator is “OFF” when the alarm
output is “ON”.
The alarm values can be accessed in configuration module (4-AL), the
unprotected mode, and in the protected mode, if not locked.
CAUTION: In applications where equipment or material damage, or risk to
personnel due to controller malfunction could occur, an independent and
redundant temperature limit indicator with alarm outputs is strongly
recommended. Red Lion Controls model IMT (thermocouple) or model
IMR (RTD) units may be used for this purpose. The indicators should have
independent input sensors and AC power feeds from the other equipment.
Alarm Action (Act1, Act2)
The alarm(s) may be independently configured for one of six possible alarm
modes or configured to operate as a timed event output(s). The timed event
output(s) are programmed in profiles module 8 (8-Pr).
Note: If an alarm is programmed for Timed Event Output (P-Ev), the
remaining alarm parameters are not applicable.
Alarms configured for deviation or band action, track the setpoint during
ramp and hold phases of a profile. Deviation and band alarms trigger from the
target setpoint when the auto setpoint ramp rate (SPrP) feature is enabled.
The alarm action figures describe the status of the alarm output and the front
panel indicator for various over/under temperature conditions. (See output
module “OUTPUT ON” state table for definitions, under installing output
modules section.) The alarm output waveform is shown with the output in the
automatic reset mode.
Note: Select the alarm action with care. In some configurations, the front
panel indicator (LED) might be “OFF” while the output is “ON”.
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Absolute High Acting (A-HI)
Absolute Low Acting (A-LO)
Deviation High Acting (d-HI) - Tracks Setpoint Value
Deviation Low Acting (d-LO) - Tracks Setpoint Value
Band Inside Acting (b-in) - Tracks Setpoint Value
Band Outside Acting (b-Ot) - Tracks Setpoint Value
Timed Event Output (P-Ev)