Allen-Bradley Micro850 series User Manual

Micro850 48 Point Programmable Controllers 13
Publication 2080-IN008C-EN-P - August 2017
Control Drawing for Class 1 Division 2 Applications
Hazardous Location
Class 1 Division 2,
Groups A, B, C, and D
Non-Hazardous Location
Micro800
Controller
USB Port
J3
V
max
= 5V DC
I
max
= 500 A
L
i
= 1 H
C
i
= 120 pF
Any associated apparatus with
Universal Serial Bus (USB) connection
USB Port
V
oc
, I
sc
, L
a
and C
a
to be determined per
Capacitance and Inductance Values
table
Capacitance and Inductance Values
Nonincendive
Equipment
Associated Apparatus
V
max
(or U
i
)  V
oc
or V
t
(or U
o
)
I
max
(or L
i
)  I
sc
or I
t
(or I
o
)
C
i
+ C
cable
 C
a
(or C
o
)
L
i
+ L
cable
 L
a
(or L
o
)
Capacitance and Inductance of the field wiring from the nonincendive equipment to the
associated apparatus shall be calculated and must be included in the system
calculations as shown in the table above.
Where the cable capacitance and inductance per foot are not known, the following
values shall be used: C
cable
= 60 pF/ft, L
cable
= 0.2 H/ft.
Wiring method must be in accordance with ANSI/NFPA70.

Allen-Bradley Micro850 series Specifications

General

Brand	Allen-Bradley
Model	Micro850 series
Category	Controller
Language	English