VC-M-1
Installation, Operation & Maintenance Manual
OPTIONS
EXTERNAL ALARM OPTION:
This option feature allows the user to connect an audible or visual alarm apparatus located externally from
the Mainframe.
NOTE: To function, the Optional External Alarm Feature must also be present in the Mainframe.,
The alarm will activate if any of the properly optioned VC-M-1 modules in the mainframe go to an error
condition (regardless of the audible ALARM feature setting in the Options Menu).
Error Conditions:
•
Open Heater/Triac (tOh)
•
Shorted Heater/Triac (tSh)
•
Over current Condition (HiC)
•
Open Thermocouple (tCO)
•
Shorted Thermocouple (tCS)
•
Reversed Thermocouple (tCr)
•
Ground Fault (gFd)
•
Internal Configuration Error (CAL, cFg, CFg)
•
Over or Under temperature condition (+/-30 º from setpoint)
High/Low Temperature Alarm Notes:
•
First power up: When the module is first powered up, the Process Temperature will be below the
setpoint and have a low temperature condition, however, the module will not
close the alarm contacts, since this is considered to be normal operation. Once
the Process Temperature enters the normal range of +/- 30
o
(16° C) from setpoint,
the alarm contact closure procedure will be enabled for any future high or low
temperature conditions.
•
Standby mode: Placing the module into Standby Mode creates a temporary target temperature of
212
o
F. (100° C) If the Process Temperature at that time is +/- 30
o
from 212
o
F
(100° C), the alarm contacts will close.
•
Boost Mode: Placing the VC-M-1 into Boost Mode creates a temporary target temperature
greater than the current setpoint (the temperature and time are set in the Options
Menu). If the Process temperature at that time is +/- 30
o
from the temporary
Boost target temperature, the alarm contacts will close activating the external
alarm.
•
Operator Intervention: If an operator changes the setpoint, causing it to be +/- 30
o
from the
Process Temperature, the alarm contacts will close activating the external alarm.
•
Manual Mode: The alarm contacts will not close for High/Low Temperature conditions if the
module is in Manual Mode.
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