Application Information - AB Quality VersaView 6181H Installationsanleitung

Table 2 Required Circuit Parameters for USB and PS2 Peripheral Devices
Parameter Value
V 5.25V dc
max
(minimum)
2.2 A
I
max
(minimum)
C 30 µF
i
L 1.7 µH
i

Application Information

Per the National Electrical Code, the circuit parameters of associated field wired
apparatus for use in hazardous locations shall be coordinated with the host product
such that their combination remains nonincendive. The VersaView 1500P computer,
and the USB, and PS2 peripheral devices shall be treated in this manner.
The circuit parameters of the VersaView 1500P computer's USB and PS2 ports are
given in Table 1. The VersaView 1500P computer provides two USB ports and one
PS2 port with a Y-cable.
The USB and PS2 peripheral devices and their associated cabling shall have circuit
parameters with the limits given in Table 2 for them to remain nonincendive when
used with the computer's USB and PS2 ports. For the comparison of C
the sum of the capacitance of all connected peripheral devices and their associated
cables C . For the comparison of L
i
peripheral device and its associated cable for L
If cable compliance and inductance are not known, the following values from UL
913 may be used:
C = 60 pF/ft
cable
L = 0.20 µH/ft
cable
VersaView 6181H Integrated Display Computers
Parameter Definition
Maximum applied voltage rating of each peripheral device. V
peripheral shall be greater than or equal to V
≥ V
V
max (per ipheral) oc (USB)
Maximum current to which each peripheral device can be subjected. I
each peripheral shall be greater than or equal to I
≥ I
I
max (peripheral) sc (USB)
Maximum allowed total capacitance of all peripheral devices and their
associated cables. The sum of C
devices and C of their associated cables shall be less than or equal to C
cable
(C + C ) + (C + C
i cable USB1 i
Maximum allowed total inductance of each peripheral device and its
associated cable. The sum of C
associated cables shall be less than or equal to L
+ L ≤ L
(L )
i cable USB1 a
+ L ≤ L
(L )
i cable USB2 a
+ L ≤ L
(L )
i cable PS2 a
and L
a
oc (USB)
and/or V as appropriate
oc (PS2)
and/or I as appropriate
sc (PS2)
of all simultaneously connected peripheral
i
) + (C + C
cable USB2 i cable
of each peripheral device and L
L
, use the inductance of each individual
i
.
i
Publication 6181H-IN001B-MU-P
of each
max
and V in Table 1.
oc (PS2)
max
and I in Table 1.
sc (USB) sc (PS2)
≤ C
)
PS2 a
of its
cable
.
a
and C
a
15
of
.
a
, use
i