Class 8839 58M Enclosed AC Drives
Specifications
2.12SYSTEM CONTROL AND INTERFACE REQUIREMENTS
Note to Specifier: Select the additional control functions that are appropriate for application requirements.
a.The following additional controls and interface requirements shall be provided:
1.Smoke Purge – The AC Drive shall provide a smoke purge interface relay. This relay, when closed will force the AC Drive to operate at the high speed setting (HSP) of the drive controller independent of any control setting or interlock. If full speed bypass is provided, the drive shall operate on bypass when the smoke purge relay is closed, independent of any system interlocks.
2.Fire / Freeze Stat Interlocks – The AC drive shall provide interlock wired to user terminals. Open interlocks shall prevent drive or bypass operation unless a smoke purge relay is provided and closed.
3.Damper End Switch – The AC Drive shall provide a damper control circuit to coordinate the position of a damper to open before the motor is started either in AFC or Bypass. This circuit shall also provide maximum power of 40 VA sealed and 100 VA into the damper solenoid.
4.Seal Water Solenoid – The AC Drive shall provide 120 Vac / 50 VA to operate the seal water solenoid whenever the motor is energized.
5.Moisture Detection – The AC Drive shall provide a moisture detection circuit to indicate the presence of moisture in the windings of a submersible pump and prevent drive or bypass operation if moisture is detected.
6.Check Valve Sequencing – The AC Drive shall provide a circuit that shuts down the drive whenever a user supplied check valve limit switch does not open within a specified time. This circuit shall provide an illuminated reset push button to indicate improper sequence.
7.Motor Space Heater Sequencing – The AC Drive shall provide 120Vac/50VA to operate motor space heater when the motor is not running.
8.Motor Elapsed Time Meter – The AC Drive shall provide and elapsed time meter which operate whenever the motor runs.
9.Auxiliary Contacts – The AC Drive shall provide the following auxiliary contacts to indicate the following conditions:
2 N.O. contacts to indicate DRIVE RUN
1 N.C. contact to indicate DRIVE RUN
1 N.O. contact to indicate DRIVE FAULT
2 N.C. contacts to indicate DRIVE FAULT
1 N.O. contact to indicate BYPASS RUN
1 N.O. contact to indicate AUTO/COMM MODE
2.13COMMUNICATION AND NETWORKING REQUIREMENTS
Note to Specifier: Specifying a communication relay serves two important user safety concerns when using network communications:
1.Ensures that communication can not start an AC Drive when safety interlocks (limit, pressure, temperature or flow switches and/or Emergency Stop circuits) that are not part of the communication network are in an open state.
2.Ensures that network communications can not start, stop, or change the speed of an AC Drive, when a control mode other than communication is selected.
a.A Communication Mode Relay (CMR) shall close when operator controls are in the communication position. Contacts from the CMR relay shall pick up the run command relay if all safety conditions are met. Contacts from the CMR relay shall also provide pilot light indication when the AC Drive is in the communication mode. The CMR relay shall allow monitoring using network communication in any operator control mode. Network communication of start, stop, and speed control shall be limited to the communication mode when operator controls are in the communication position.
b.The following Ethernet TCP/IP communication card and protocol shall be mounted and wired within the enclosed AC Drive.
c.The AC Drive shall accept an Ethernet communications card that includes embedded
1.The embedded
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©
09/2003
