Rockwell Automation 2711PC-T10C4D1 PanelView Plus Terminals and Display Modules - Manual (Page 7)

PanelView Plus 700 to 1500 and PanelView Plus Compact 1000 Terminals and Display Modules 7
Publication 2711P-IN001I-EN-P - November 2009
Application Information
Per the National Electrical Code the circuit parameters of nonincendive field wiring apparatus
for use in hazardous locations shall be coordinated with the associated nonincendive field
wiring apparatus such that their combination remains nonincendive. The PanelView Plus
terminals and the USB peripheral device shall be treated in this manner.
The circuit parameters of the PanelView Plus USB port are given in Table 1. The USB
peripheral device and its associated cabling shall have circuit parameters with the limits given
in Table 2 for them to remain nonincendive when used with the PanelView Plus USB port. If
cable capacitance and inductance are not known the following values from ANSI/ISA-RP
12.06.01-2003 may be used:
C cable = 197 µF/m (60 µF/ft)
L cable = 0.7 µF/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.
Symbol Definitions
V
oc
Open circuit voltage of the host USB port.
I
sc
Maximum output current of the host USB port.
V
max
Maximum applied voltage rating of the USB peripheral device.
V
max
shall be greater than or equal to V
oc
in Table 1 (V
max
≥
V
oc ).
I
max
Maximum current to which the USB peripheral device can be subjected.
I
max
shall be greater than or equal to I
sc
in Table 1 ( I
max
≥ I
sc
).
C
i
Maximum internal capacitance of the USB peripheral device.
C
a
Maximum allowed capacitance of the USB peripheral device and its associated cable. The
sum of C
i
of the USB peripheral device and C
cable
of the associated cable shall be less
than or equal to C
a
(C
i
+ C
cable
≤
C
a
).
L
i
Maximum internal inductance of the USB peripheral device.
L
a
Maximum allowed inductance of the USB peripheral device and its associated cable. The
sum of L
i
of the USB peripheral device and L
cable
of the associated cable shall be less than
or equal to L
a
(L
i
+ L
cable
≤
L
a
).