Rockwell Automation 2711PC-xxxx PanelView Plus 6 Compact Terminals User Manual - Manual (Page 19)

Rockwell Automation Publication 2711PC-UM002B-EN-P - April 2014 19
Install the Terminal Chapter 2
Required Circuit Parameters for USB Peripheral Devices
This product contains a USB host port that complies with hazardous location environments. Field-wiring compliance
requirements are provided in compliance with the National Electrical Code, Article 500.
Figure 1 - PanelView Plus 6 Compact Terminals Control Drawing
PanelView Plus 6 Compact terminals provide one separately powered USB host port. Table 11 defines the circuit
parameters of the USB host port.
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 Compact
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 11 for
them to remain nonincendive when used with the PanelView Plus 6 Compact 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 Compact Host Product
USB Peripheral Device USB Host Port
Table 11 - 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 each 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)
, that 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 each 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)