International and national certifications
10.2.9.5 USB connection with the SDL or SDL3 link module
10.2.9.5.1 Introduction
The information below describes the use of USB peripheral devices on the front USB interfaces of the B&R SDL
or SDL3 link module in hazardous locations Class I, Division 2, Groups A, B, C and D.
Danger!
RISK OF EXPLOSION
•
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 conditions must be met:
°
A suitable switch installed outside the hazardous area is used.
°
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!
10.2.9.5.2 Description
Nonincendive devices (keyboards, mouse) are certified for use on the USB interfaces of the B&R SDL or SDL3 link
module (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 USB interfaces must meet the following criteria.
Connected device
USB pinout
1. Vcc
2. D-
3. D+
4. GND
Shield. GND
Class I, Division 2
Group A, B, C, D
or non-hazardous location
Nonincendive device
with field wiring
USB peripheral
devices
Class I, Division 2
Group A, B, C, D
USB cable
USB interfaces (USB 2.0):
Open-circuit voltage [V
oc
]
5.12 V
Short-circuit current [I
sc
]
2131 mA
Connected capacity [
Ca
]
20 μF
Connected inductance [
La
]
16.8 μH
Table 27: Nonincendive circuit parameters for the USB 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.
The nonincendive device with field wiring must meet the following criteria:
Automation Panel 9x3 User's manual 2.01
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