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<br />I <br /> <br />returning motor to set speed in proper direction, without damage to <br />controller, motor, or load. <br />k. Power-Interruption Protection: To prevent motor from re-energizing after <br />a power interruption until motor has stopped. <br />I. Torque Boost: Automatically vary starting and continuous torque to at <br />least 1.5 times the minimum torque to insure high-starting torque and <br />increased torque at slow speeds. <br />m. Motor Temperature Compensation at Slow Speeds: Adjustable current <br />fall-back based on output frequency for temperature protection of self- <br />cooled fan-ventilated motors at slow speeds. <br />n. Status Lights: Door-mounted LED indicators will indicate the following <br />conditions: <br />1) Power on. <br />2) Run. <br />3) Overvoltage. <br />4) Line fault. <br />5) Overcurrent. <br />6) External fault. <br />o. Panel-Mounted Operator Station: Start-stop and auto-manual selector <br />switches with manual speed control potentiometer and elapsed time <br />meter. . <br />p. Indicating Devices: Meters or digital readout devices and selector switch, <br />mounted flush in controller door and connected to indicate the following <br />controller parameters: <br />1) Output frequency (Hz). <br />2) Motor speed (rpm). <br />3) Motor status (running, stop, fault). <br />4) Motor current (amperes). <br />5) Motor torque (percent). <br />6) Fault or alarming status (code). <br />7) PID feedback signal (percent). <br />8) DC-link voltage (VDC). <br />9) Set-point frequency (Hz). <br />10) Motor output voltage M. <br />q. Control Signal Interface: Provide VFC with the following: <br />1) Electric Input Signal Interface: A minimum of 2 analog inputs (0 to <br />10 V or 0/4-20 mA) and 6 programmable digital inputs. <br />2) Pneumatic Input Signal Interface: 3 to 15 psig. <br />3) Remote Signal Inputs: Capability to accept any of the following <br />speed-setting input signals from the BMS or other control systems: <br />a) 0 to 10-V dc. <br />b) 0-20 or 4-20 mA. <br />c) Potentiometer using up/down digital inputs. <br />d) Fixed frequencies using digital inputs. <br />e) RS485. <br />1) Keypad display for local hand operation. <br />4) Output Signal Interface: <br />a) A minimum of 1 analog output signal (0/4-20 mA), which can <br />be programmed to any of the following: <br />i. Output frequency (Hz). <br />ii. Output current (load). <br />iii. DC-link voltage (VDC). <br /> <br />I <br /> <br />I <br />