Table 3-1: DC Power Supply Specifications
Description Design Specification
Power 40W, -40 to -72 VDC
Wire gauge for power connections
14 AWG
1
1
AWG = American wire gauge.
Wiring the DC Power Supply
If you ordered a multiport serial router with a DC power supply, follow the directions in this section for
proper wiring.
Warning Only trained and qualified personnel should be allowed to install or replace this
equipment. (To see translated versions of this warning, refer to the Regulatory Compliance and
Safety Information document that accompanied the router.)
Warning Before performing any of the following procedures, ensure that power is removed from
the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that
services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of
the circuit breaker in the off position. (To see translated versions of this warning, refer to the
Regulatory Compliance and Safety Information document that accompanied the router.)
Warning This unit is intended for installation in restricted access areas. A restricted access area is
where access can only be gained by service personnel through the use of a special tool, lock and
key, or other means of security, and is controlled by the authority responsible for the location. (To
see translated versions of this warning, refer to the Regulatory Compliance and Safety
Information document that accompanied the router.)
Note This product is intended for installation in areas with restricted access and is approved for use with
copper conductors only. The installation must comply with all applicable codes.
Figure 3-10 shows the DC power supply terminal block. Take the following steps to wire the terminal
block:
Step 1 Attach the appropriate lugs at the wire end of the power supply cord.
Step 2 Wire the DC power supply to the terminal block as shown in Figure 3-10.
Warning The illustration shows the DC power supply terminal block. Wire the DC power supply
using the appropriate lugs at the wiring end, as illustrated. The proper wiring sequence is ground
to ground, positive to positive (line to L), and negative to negative (neutral to N). Note that the
ground wire should always be connected first and disconnected last. (To see translated versions of
this warning, refer to the Regulatory Compliance and Safety Information document that
accompanied the router.)
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_fix/cis2500/2520/2520_23/c2520ins.htm (7 of 14) [10/27/2000 3:07:47 PM]
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