Required Circuit Parameters For Usb Peripheral Devices - Allen-Bradley PanelView Plus 6 User Manual

Required Circuit Parameters for USB Peripheral Devices

The terminals contain one or two USB host ports that comply with hazardous location environments. Field-wiring
compliance requirements are provided in compliance with the National Electrical Code, Article 500.
Figure 4 - PanelView Plus 6 Terminals Control Drawing
Associated Nonincendive Field-wiring Apparatus
PanelView Plus 6 Host Product
PanelView Plus 6 terminals provide one or two separately-powered USB host ports.
of the USB host ports.
Table 30 - Circuit Parameters for USB Host Ports
Parameter Value Parameter Definition
V 5.25V DC Open circuit voltage of the host USB port.
oc (USB)
The maximum applied voltage rating, V
or equal to V
I
1.68 A Maximum output current of the host USB port.
sc (USB)
The maximum current, I
greater than or equal to I
C 10 μF This value is the maximum total capacitance that can be connected to the USB host port. The total
a (USB)
capacitance of the USB peripheral device and its associated cable must not exceed the indicated value.
The maximum total capacitance, C
must be less that or equal to C
L 15 μH This value is the maximum total inductance that can be connected to the USB host port. The total
a (USB)
inductance of the USB peripheral device and its associated cable must not exceed the indicated value.
The maximum total inductance, L
must be less than or equal to L
Application Information
Per the National Electrical Code, the circuit parameters of associated field-wiring apparatus for use in hazardous locations
must be coordinated with the host product such that their combination remains nonincendive. PanelView Plus 6 terminals
and the USB peripheral devices must be treated in this manner.
The USB peripheral devices and their associated cabling must have circuit parameters with the limits given in
them to remain nonincendive when used with the PanelView Plus 6 USB host port.
If cable capacitance and inductance are not known, use the following values from ANSI/ISA-RP 12.06.01-2003:
C = 197 pF/m (60 pF/ft)
cable
L = 0.7 μH/m (0.20 μH/ft)
cable
Nonincendive field-wiring must be wired and separated in accordance with 501.10(B)(3) of the National Electrical Code
(NEC) ANSI/NFPA 70 or other local codes as applicable. This associated nonincendive field-wiring apparatus has not
been evaluated for use in combination with another associated nonincendive field-wiring apparatus.
USB Host Port
USB Host Port
max (peripheral)
.
oc (USB)
, to which each USB peripheral device can be subjected must be
max (peripheral)
sc (USB).
, and cable capacitance of the separate USB peripheral device
i (peripheral)
.
a (USB)
, and cable inductance of the separate USB peripheral device
i (peripheral)
.
a (USB)
Rockwell Automation Publication 2711P-UM006E-EN-P - January 2017
Nonincendive
Field-Wiring Apparatus
USB Peripheral Device
USB Peripheral Device
Table 30
, of the USB peripheral device must be greater than
Install Terminal Chapter 2
defines the circuit parameters
≥ V
V ,
max (peripheral) oc (USB)
as appropriate
≥ I
I
max (peripheral) sc (USB)
≤ C
C + C
i (peripheral) cable(USB) a (USB)
≤ L
L + L
i (peripheral) cable a (USB)
Table 30 for
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