B-60
Cisco IE 3000 Switch Hardware Installation Guide
Appendix B Installation In a Hazardous Environment
Connecting the Switch to the Power Converter
Figure B-44
AC/DC Power Input Terminal Block Wire Connections to a DC Source
Warning
An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure
that no exposed portion of the DC-input power source wire extends from the power and relay
connector. Statement 122
Step 7
Insert the twisted-pair wire leads into the terminal block line and neutral connections. Insert the wire
(labeled number 1 in
) lead into the neutral wire connection and the wire (labeled
number 2 in
) lead into the line wire connection. Ensure that only wire
with
insulation
extends from the connectors. See
Step 8
Tighten the line and neutral terminal block screws.
Note
The torque should not exceed 2.2 in-lb (0.25 Nm).
Step 9
Connect the red wire to the positive pole of the DC power source, and connect the black wire to the return
pole. Ensure that each pole has a current-limiting-type fuse rated to at least 600 VAC/DC (such as the
KLKD Midget fuse).
1
Earth ground wire connection
3
Positive DC connection
2
Return wire connection (to DC return)
DC OK
24V , 2.
1A
Rtn Out
(-)
Pwr Out (+)
125-250V
, 1.25A M
AX
100-240V~
, 50-60Hz/
N /
L /
202301
3
2
1