Allen-Bradley PanelView Plus 2711P, Руководство пользователя, Страница: 28 / 170

Publication 2711P-UM001B-EN-P
2-2 Installation
PanelView Plus 400/600 USB Port
The PanelView Plus 400/600 Terminals contain a single USB
(Universal Serial Bus) port which complies with hazardous location
environments. This section details the field wiring compliance
requirements and is provided in accordance with the National
Electrical Code, article 500.
The USB peripheral device must be rated for use in the hazardous
location environment in which it is used and also comply with the
circuit parameters in Table 2.
The circuit parameters in Table 1 define the maximum voltage and
current of the PanelView Plus 400/600 USB port.
The circuit parameters in Table 2 define the maximum voltage,
current, capacitance, and inductance values for any peripheral device
connected to the PanelView Plus 400/600 USB port in a hazardous
location environment.
Table 2.1 PanelView Plus 400/600 USB Port Circuit Parameters
Parameter Value Parameter Definition
V
oc
5.25V dc Open circuit voltage of the host USB port.
I
sc
1.68 A Maximum output current of the host USB port.
Table 2.2 Required Circuit Parameters for the USB Peripheral Device
Parameter Value Parameter Definition and Application Requirement
V
max
5.25V dc 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
1.68 A 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
a
10 µF Maximum allowed capacitance of the USB peripheral device and its
associated cable. The sum of C
int
of the USB peripheral device and
C
cable
of the associated cable shall be less than or equal to C
a
.
(C
a
≤
C
int
+ C
cable)
L
a
15 µH Maximum allowed inductance of the USB peripheral device and its
associated cable. The sum of L
int
of the USB peripheral device and
L
cable
of the associated cable shall be less than or equal to L
a
.
(L
a
≤
L
int
+ L
cable)
USB
Peripheral
Device
PanelView Plus 400/600 Host Product
Associated Nonincendive Field
Wiring Apparatus
USB Port