Proface PS4800 - 19 Panel PC" - Manual (Page 72)

PS-4000B Series User Manual
72
Description
Non-incendive equipment (keyboards, mouse) are permitted for use on the PS-B
unit (Associated Apparatus) USB ports 1, 2, 3, 4 (not for USB 5, only for
maintenance). In addition to being non-incendive, any equipment connected to the
USB ports 1, 2, 3, 4 must satisfy the following criteria.
The following figure shows the USB cable wiring.
Notes:
1. The following table gives the Non-incendive Circuit Parameters:
The Entity Concept allows interconnection of non-incendive apparatus with
associated apparatus not specifally examined combinations as a system when the
approved values of V
oc
(or U
o
) and I
sc
(or I
o
) for the associated apparatus are less
than or equal to Vmax (U
i
) and Imax (I
i
) for the non-incendive apparatus and the
approved values of C
a
(C
o
) and L
a
(L
o
) for the associated apparatus are greater than
or equal to C
i
+ C
cable
and L
i
+ L
cable
, respectively, for the non-incendive field wiring
apparatus.
USB Ports 1 and 3 USB Ports 2 and 4
Open-circuit voltage = V
oc
5.066 V 5.26 V
Short-circuit current = I
sc
1320 mA 830 mA
Associated capacitance = C
a
20
µF
20
µF
Associated inductance = L
a
16.8
µH
16.8
µH
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