Proface PS4800 - 19 Panel PC" - Manual (Page 102)

Industrial Personal Computer Connections
102
CAUTION
LOSS OF POWER
z Ensure that communication connections do not place excessive stress on the
communication ports of the Industrial Personal Computer.
z Securely attach communication cables to the panel or cabinet.
z Use only D-Sub 9 pin cables with a locking system in good condition.
Failure to follow these instructions can result in injury or equipment damage.