The system may also include a contact closure interface having inputs for {HEAD ~ connection} of an alternate device or {TAIL ~ control system} to the contact closure interface for generating command signals for controlling one or more of the drive units 
of
The system may also include a contact closure interface having inputs for { HEAD ~ connection } of an alternate device or { TAIL ~ control system } to the contact closure interface for generating command signals for controlling one or more of the drive units
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH