Usb Connection With The 4-Port Hub - B&R Panel PC 2100 User Manual

Standards and certifications

5.2.7.7 USB connection with the 4-port hub

5.2.7.7.1 Introduction
The information below describes the use of USB peripheral devices for the B&R 4-port USB hub in hazardous
locations Class I, Division 2, Groups A, B, C and D.
Danger!
DANGER OF EXPLOSION
• Before installation or use in a potentially explosive atmosphere, the explosion protection class
of the device must be checked per ANSI/ISA 12.12.01 and CSA C22.2 No. 213.
• The following must be used to switch on/off B&R devices installed in a potentially explosive
atmosphere:
° A switch outside the potentially explosive atmosphere, or
° A switch that is certified in accordance with the hazardous location class and division
for "tube use"
• As long as the electrical circuit is activated, cables or wires are not permitted to be connected or
disconnected unless the area is known to be free of ignitable concentrations of vapors, gases
and other flammable or combustible materials. This applies to all connections and switches.
This includes electrical, ground and network connections as well as series and parallel con-
nections.
• Unshielded/Ungrounded cables are not permitted to be used in potentially explosive atmos-
pheres under any circumstances.
• Only configurations with nonincendive USB devices are permitted to be used.
• Doors and openings on housings must remain closed. This prevents the accumulation of for-
eign bodies within the workstation.
Failure to follow these instructions can result in death, serious injury or damage to property!
5.2.7.7.2 Description
Nonincendive devices (keyboards, mouse) are certified for use on the B&R 4-port hub (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.
The figure shows a wiring diagram of the USB cable:
The following table indicates the nonincendive electrical circuit parameters:
USB interfaces (USB 2.0):
No-load voltage [V ]
oc
Short circuit current [I ]
sc
Associated capacitance [C ]
a
Associated inductance [L ]
a
Table 278: Nonincendive electrical circuit parameters for the 4-port USB interfaces
312
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
5.11 V
1621 mA
20 μF
16.8 μH
Nonincendive device
with field wiring
USB cables
USB peripheral
devices
Class I, Division 2
Group A, B, C, D
Panel PC 2100 user's manual V1.17