Usb Connection With Optional Displayport Graphics Option - B&R Automation PC 3100 User Manual

10.2.6.6 USB connection with optional DisplayPort graphics option

10.2.6.6.1 Introduction
The information below describes the use of USB peripheral devices on the USB interface of the DisplayPort graph-
ics option in the B&R Automation PC 3100 in hazardous locations Class I, Division 2, Groups A, B, C and D.
Danger!
EXPLOSION HAZARD
• Before installation or use in potentially explosive atmospheres, the explosion protection class
of the device must be checked according to ANSI/ISA 12.12.01 and CSA C22.2 N°213.
• To switch on/off B&R devices that are installed in potentially explosive atmospheres, at least
one of the following measures must be taken:
° The switch is positioned outside the potentially explosive atmosphere.
° A switch certified according to the hazardous location class and division for "tube use"
is used.
• As long as the electrical circuit is activated, cables or lines are not permitted to be connected or
disconnected unless the area is knowingly free of flammable concentrations of vapors, gases
and other flammable or combustible materials. This applies to all connections and circuits. This
includes power, ground and network connections as well as series and parallel connections.
• Unshielded/Ungrounded cables are never permitted to be used in potentially explosive atmos-
pheres.
• Only configurations with nonincendive USB devices are permitted to be used.
• The doors and openings of housings must always remain closed. This prevents the accumula-
tion of foreign bodies within the workstation.
Failure to follow this instruction can result in death, serious bodily injury or damage to property!
10.2.6.6.2 Description
Nonincendive devices (keyboards, mouse) are certified for use on the USB interface of the DisplayPort graphics
option in the B&R Automation PC 3100 (connected device) and are permitted to be connected and disconnected
during operation. In addition to the nonincendive property, devices that can be connected to the USB1 interface
must meet the following criteria.
The figure shows a sketch of the wiring of the USB cable:
The following tables indicate the nonincendive electrical circuit parameters:
USB1 interface (USB 3.0):
Open-circuit voltage [V ]
oc
Short-circuit current [I ]
sc
Connected capacity [ ]
Ca
Connected inductance [ ]
La
The unit concept allows the interconnection of nonincendive devices with connected devices with non-specifically
tested combinations as a system. For this purpose, the permissible values of V
connected device must be less than or equal to V
values of C (C ) and L
a o a
for the nonincendive device with field wiring.
Automation PC 3100 User's manual V 2.10
Connected device
USB 1 (2.0) pinout
1. Vcc
2. D-
3. D+
4. GND
Shield. GND
Class I, Division 2
Group A, B, C, D
or non-hazardous location
5.0 V
8.16 A
20 μF
4.8 μH
Table 155: Nonincendive circuit parameters for the USB1 interface
(L ) for the connected device must be greater than or equal to C
o
Nonincendive device
with field wiring
USB cable USB peripheral
devices
Class I, Division 2
Group A, B, C, D
(U ) and I (I ) for the nonincendive device, the permissible
max i max i
International and national certifications
(or U ) and I
oc o sc
+ C
i Cable
(or I ) for the
o
and L + L
i Cable
237