Rockwell-automation VersaView 1200P Integrated Display Computers for H Manual de usuario descargar pdf (Pagina 15)

VersaView 1200P Integrated Display Computers for Hazardous Locations 15

Publication 6183H-IN001E-EN-P - July 2007

Required Circuit Parameters for USB and PS2 Peripheral Devices

Parameter Value Parameter Definition

max (USB)

max (PS2)

5.25V dc

(minimum)

Maximum applied voltage rating of each peripheral device. V

max

of each USB

peripheral shall be greater than or equal to V

oc (USB)

in the VersaView 1200P

USB and PS2 Port Circuit Parameters table on page 14.

max (per ipheral)

≥ V

oc (USB)

and/or V

oc (PS2) ,

as appropriate.

max (USB)

1.0 A

(minimum)

Maximum current to which each USB peripheral device can be subjected. I

max

of each USB peripheral shall be greater than or equal to I

sc (USB)

in the

VersaView 1200P USB and PS2 Port Circuit Parameters table on page 14.

max (USB peripheral)

≥ I

sc (USB)

max (PS2)

2.2 A

(minimum)

Maximum current to which each PS2 peripheral device can be subjected. I

max

of each PS2 peripheral shall be greater than or equal to I

sc (PS2)

in the

VersaView 1200P USB and PS2 Port Circuit Parameters table on page 14.

max (PS2 peripheral)

≥ I

sc (PS2)

i (USB)

20 µF Maximum allowed total capacitance of each separate USB peripheral device

and its associated cable. C

of each separate USB peripheral device and C

cable

of its associated cable shall be less than or equal to C

a (USB)

in the VersaView

1200P USB and PS2 Port Circuit Parameters table on page 14.

i (

USB)

+ C

cable (USB)

≤ C

a (USB)

i (PS2)

20 µF Maximum allowed total capacitance of all simultaneously connected PS2

peripheral devices and their associated cables. The sum of C

of all

simultaneously connected PS2 peripheral devices and C

cable

of their

associated cables shall be less than or equal to C

a (PS2)

in the VersaView 1200P

USB and PS2 Port Circuit Parameters table on page 14.

+ C

cable

)

PS2 / 1

+ C

cable

)

PS2 / 2

≤ C

a (PS2)

i (USB)

i (PS2)

3.11 µH Maximum allowed total inductance of each peripheral device and its

associated cable. The sum of L

of each peripheral device and L

cable

of its

associated cables shall be less than or equal to L

a (USB)

a (PS2)

appropriate in the VersaView 1200P USB and PS2 Port Circuit Parameters table

on page 14.

+ L

cable

)

USB1

≤ L

a (USB)

+ L

cable

)

USB2

≤ L

a (USB)

+ L

cable

)

PS2/1

≤ L

a (PS2)

+ L

cable

)

PS2/2

≤ L

a (PS2)

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 23 24

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