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ACT2000
This FAULT does not clear without RESET command.
Unregulated Voltage Low
The MCE signals a FAULT if the reference voltage drops below minimum for
ten (10) seconds.
Should the voltage return to acceptable level, the FAULT signal is cleared.
+/- 14V High/Low
The MCE signals a FAULT if the internal ±14 VDC power supplies exceed
operating limits. This FAULT does not clear without RESET command.
Input voltage High/Low
The MCE signals a FAULT if the 120 VDC supply exceeds 180 VDC or drops
below 75 VDC for more than 10 seconds. This FAULT clears when the 120 VDC
supply voltage returns.
2.6 OVERTEMP Alarm
The OVERTEMP alarm is a discrete output from the ACT2000. The OVERTEMP
circuit is CLOSED in the normal operating condition.
During normal operation, the ACT2000 monitors the electronics and motor
winding temperatures. If ACT2000 detects the motor or electronics temperature
above the maximum allowable, the OVERTEMP circuit is opened. The user-
provided controller should detect the open circuit.
An OVERTEMP Alarm will be indicated if the motor winding temperature is 130°C
or higher for ten (10) seconds or the electronics temperature is 110°C or higher
for ten (10) seconds.
Should an OVERTEMP alarm occur, the user should shut down the actuator.
Removing 120 VDC power shuts down the ACT2000. Toggling the RESET
command will clear the FAULT alarm, but it does NOT clear the fault file.
Note: The ACT2000 outputs an OVERTEMP alarm 5°C before the shut
down threshold.
2.7 Automatic Shutdown
The ACT2000 has a self-protective shutdown feature.
• If any two motor winding temperatures exceed 135 °C for one (1) minute, the
ACT2000 will shut down.
• If the electronics temperature exceeds 115 °C for one (1) minute, the
ACT2000 will shut down.
Note: Actuator position feedback and motor current will be set to 0 mA
when the actuator shuts down.
WARNING:
Property Damage and Injury Hazard – If the motor windings exceed 135° C
or the electronics exceed 115° C, the MCE will shut down power to the
motor and electronics thereby allowing the actuator to move with load.
Touching actuator may result in serious burn injury
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