Mitsubishi Electric RH-FRH Series Instruction Manual page 6

CAUTION
Use the network equipments (personal computer, USB hub, LAN hub, etc)
confirmed by manufacturer. The thing unsuitable for the FA environment
(related with conformity, temperature or noise) exists in the equipments
connected to USB. When using network equipment, measures against the noise,
such as measures against EMI and the addition of the ferrite core, may be
necessary. Please fully confirm the operation by customer. Guarantee and
maintenance of the equipment on the market (usual office automation
equipment) cannot be performed.
CAUTION
To maintain the safety of the robot system against unauthorized access from
external devices via the network, take appropriate measures.
To maintain the safety against unauthorized access via the Internet, take mea -
sures such as installing a firewall.