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CiscoASR 9000 Series Aggregation Services Router Hardware Installation Guide
Chapter3 Installing Cards and Modules in the Chassis
Connecting Power to the Router
The alarm subconnector can be used to connect the router to an external site alarm maintenance system.
Any critical, major, and minor alarms generated by the router also energize alarm relays on the alarm
card and activate the external site alarm. The alarm relay contacts on the RSP/RP card consist of standard
common, normally open, and normally closed relay contacts that are wired to the Alarm Out connector
pins.
Table 1 -8 lists the pin-to-signal correspondence between the connector pins and the alarm relay contacts.
Because alarm contact cables are entirely dependent on installation site circumstances, alarm connector
cables are not available from Cisco. For information about alarm connector wiring requirements and the
pinouts for the alarm connector interface, see Alarm Connection Guidelines, page1-59.
Caution Only safety extra-low voltage (SELV) circuits can be connected to the Alarm Out connector. Maximum
rating for the alarm circuit is 100 mA, 50 V.
Note To comply with the intra-building lightning surge requirements of GR-1089-CORE, IssueII,
Revision01, February 1999, you must use a shielded cable when connecting to the external alarm port
on the RSP/RP card. The shielded cable is terminated by shielded connectors on both ends, with the
cable shield material tied to both connectors.
Connecting Power to the Router
Use the one of the following procedures to connect power to your router.
•Connecting Power to an AC-Powered Router, page3-26
•Connecting Power to a DC-Powered Router, page3-28
Caution A router must be operated with all its power modules installed at all times for electromagnetic
compatibility (EMC).

Connecting Power to an AC-Powered Router

Follow these steps to connect the AC power cords to the router.
Note Connect each AC power supply to a dedicated power source (branch circuit). Each AC input
power supply operates at a nominal input level of 200 to 240VAC. For more information on AC
power input levels, see Power Connection Guidelines, page1-36.
Step1 Check that the power switch is set to the STANDBY (0) position.
•On version 1 power trays, this switch is at the rear of the power tray.
•On version 2 and version 3 power trays, this switch is at the front of the power tray.
Step2 Check that the circuit breaker assigned to the AC power source you are connecting is set to OFF.
Step3 Connect the permanent ground connection (central office grounding system) to the NEBS grounding
location on the router chassis.