Rockwell Automation 2711P-xxxx PanelView Plus 6 Terminals User Manual - Manual (Page 29)

Rockwell Automation Publication 2711P-UM006C-EN-P - April 2013 29
Install Terminal Chapter 2
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
PanelView Plus 6 terminals provide one or two separately-powered USB host ports. Table 30 defines the circuit parameters
of the USB host ports.
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 Table 30 for
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
cable
= 197 pF/m (60 pF/ft)
L
cable
= 0.7 μH/m (0.20 μH/ft)
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.
Nonincendive
Field-Wiring Apparatus
Associated Nonincendive Field-wiring Apparatus
PanelView Plus 6 Host Product
USB Peripheral Device
USB Peripheral Device USB Host Port
USB Host Port
Table 30 - Circuit Parameters for USB Host Ports
Parameter Value Parameter Definition
V
oc (USB)
5.25V DC Open circuit voltage of the host USB port.
The maximum applied voltage rating, V
max (peripheral)
, of the USB peripheral device must be greater than
or equal to V
oc (USB)
.
V
max (peripheral)
≥ V
oc (USB)
,
as appropriate
I
sc (USB)
1.68 A Maximum output current of the host USB port.
The maximum current,
I
max (peripheral)
, to which each USB peripheral device can be subjected must be
greater than or equal to I
sc (USB).
I
max (peripheral)
≥ I
sc (USB)
C
a (USB)
10 μF This value is the maximum total capacitance that can be connected to the USB host port. The total
capacitance of the USB peripheral device and its associated cable must not exceed the indicated value.
The maximum total capacitance, C
i (peripheral)
, and cable capacitance of the separate USB peripheral device
must be less that or equal to C
a (USB)
.
C
i (peripheral)
+ C
cable(USB)
≤ C
a (USB)
L
a (USB)
15 μH This value is the maximum total inductance that can be connected to the USB host port. The total
inductance of the USB peripheral device and its associated cable must not exceed the indicated value.
The maximum total inductance, L
i (peripheral)
, and cable inductance of the separate USB peripheral device
must be less than or equal to L
a (USB)
.
L
i (peripheral)
+ L
cable
≤ L
a (USB)