Standards and certifications
Automation PC 3100 User's manual V 1.00
Translation of the original documentation
213
5.2.6.5 USB connection with the Automation PC 3100
5.2.6.5.1 Introduction
The information below describes the use of USB peripheral devices on USB interfaces 1, 2, 3 and 4 of the B&R
Automation PC 3100 in hazardous locations Class I, Division 2, Groups A, B, C and D.
Danger!
EXPLOSIONSGEFAHR
•
Before installation or use in potentially explosive atmospheres, the explosion protection class
of the equipment must be checked according to ANSI/ISA 12.12.01 and CSA C22.2 N°213.
•
To switch on/off B&R devices installed in potentially explosive atmosphere, one of the following
conditions must be met:
°
A switch outside the hazardous area must be used, or
°
A switch certified according to hazardous location class and division for "tube use"
must be 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.
•
Never use unshielded/ungrounded cables in potentially explosive atmospheres.
•
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!
5.2.6.5.2 Description
Nonincendive devices (keyboards, mouse) are certified for use on the rear USB interfaces of 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 4 USB interfaces must meet the following criteria.
The figure shows a sketch of the wiring of the USB cable:
9
8
7
6
5
1. Vcc
2. D-
3. D+
4. GND
5. StdA_SSRX-
6. St
7. GND_DRAIN
8. StdA_SSTX-
9. St
Shield GND
Connected device
Class I, Division 2
Group A, B, C, D
or non-hazardous location
Class I, Division 2
Group A, B, C, D
Nonincendive device
with field wiring
USB peripheral
devices
USB cables
USB 1 (3.0) pinout
-4
The following tables indicate the nonincendive electrical circuit parameters:
USB1, USB2, USB3 and USB4 interfaces (USB 3.0):
Open-circuit voltage [V
oc
]
50 V
Short-circuit current [I
sc
]
806 A
Connected capacity [
Ca
]
20 μF
Connected inductance [
La
]
4.8 μH
Table 221: Nonincendive electrical circuit parameters for the USB1, USB2, USB3 and USB4 interfaces
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
oc
(or U
o
) and I
sc
(or I
o
) for the
connected device must be less than or equal to V
max
(U
i
) and I
max
(I
i
) for the nonincendive device, the permissible
values of C
a
(C
o
) and L
a
(L
o
) for the connected device must be greater than or equal to C
i
+ C
Cable
and L
i
+ L
Cable
for the nonincendive device with field wiring.
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