Yaskawa E7L Drive Bypass - Manual (Page 92)

Start Up and Operation 4 - 14
Contact Closure Inputs
Auto Mode Run/Stop Contact Input
TB1-2 and TB1-9 are input terminals used for the Run/Stop command when in the AUTO mode. When these input contacts
close, the unit will begin running. When the contacts reopen, the unit will cease
running.
Remote Transfer to Bypass
This function allows a contact closure from a BAS, between terminals TB1-4 and TB1-9, to transfer motor operation from
Drive mode to Bypass mode. This remote transfer to Bypass function overrides the DRIVE/BYPASS selector keys. An open
contact causes operation in Drive mode and a closed contact results in Bypass mode.
Smoke Purge
This function allows a contact closure between terminals TB1-5 and TB1-9 to transfer motor operation to Bypass for a maxi-
mum capacity smoke control function. When in smoke purge mode, during emergency fire/smoke
situations, the motor overloads and safety interlock circuit are overridden to shift the priority to protecting people rather than
equipment. [Note: Smoke purge overrides all other control inputs and selector switches. Smoke purge operation can only be
terminated by opening the contact closure at terminals TB1-5 and TB1-9 or by opening the Disconnect Switch.]