THORLABS DCU22 Series User Manual

382 DCx camera
© 2010 Thorlabs
Figure 81 USB connector
standard A (four pins)
Figure 82 USB connector standard B
(four pins)
Figure 83 USB connector Mini B
(five pins)
Figure 84 DCU Sub-D (nine pins)
9.13.3
Structure and topology
USB uses a tree topology and is host controlled. That means that a PC with host functionality is
required. Therefore it is not possible to directly connect two USB devices (with exception of USB On-
the-go compliant devices). Also it is not possible to connect a DCU camera to a PDA or similar
systems.
Theoretically 127 devices can be connected at one host controller. With hubs and/or repeater the
root hub’s connection facilities can be extended. With the consideration that maximally 5 hubs/
repeater may be switched one behind the other, USB devices can be connected in up to seven
levels. Up to 5 hubs can be connected in series which allows 6 levels of USB-devices.
Figure 85 USB topology

THORLABS DCU22 Series Specifications

General

Brand	THORLABS
Model	DCU22 Series
Category	Security Camera
Language	English