Installation guide

1-45
Cisco 6260 Hardware Installation Guide
OL-2365-02
Chapter 1 Product Overview
Cisco 6260 System Overview
• Audible alarms—Wire pins whose signals begin with AUD
• Visible alarms—Wire pins whose signals begin with VIS
• Power alarms—Wire pins whose signals begin with PEM
• BITS clock—Wire pins whose signals begin with RX_BITS
Note There is one set of contacts for audible alarms and one set for visual alarms. You can use either or both
sets of contacts.
You can wire the alarm relay contacts as normally open (NO) or normally closed (NC). (One exception
is the ACO circuit, which can be wired as NO only.) Use common (CO) pins for both the NO and NC
wiring methods.
Note For more information on how the wire-wrap pins map to the alarms, see the “Port Mapping Table”
section on page B-1.
1.2.5 PEM
The Cisco 6260 system is equipped with one or two –48/–60V direct current (DC) PEMs, which
distribute DC power within the chassis. The Cisco 6260 requires only one active PEM to operate; if two
PEMs are installed, the second PEM serves as a hot backup to the first.
Each PEM should be connected to a single DC power source. DC power (–48V) enters the chassis
through the terminal blocks on the front of each PEM. For full power redundancy, two PEMs must be
installed in the chassis, and the two PEMs must be connected to two separate DC power sources.
In a system with two PEMs installed, you can remove and replace each individual PEM while the system
continues to operate. (A system with a single PEM must be powered down before the PEM is removed.)
In addition, you can replace a PEM in a chassis with a single PEM installed without shutting down
system power by first removing the blank faceplate from the second slot, installing a replacement PEM
in the second slot, and then removing the first PEM. The blank faceplate can then be installed in the
empty first PEM slot.
Table 1-13 Pin Assignments for the Cisco 6260 I/O Module
Wiring Method Pins to Use
Normally open Pin 2 in rows 1, 2, 3, 4 (NO)
Pin 5 in rows 1, 2, 3, 4, 5 (NO)
Pin 1 in rows 1, 2, 3, 4 (CO)
Pin 4 in rows 1, 2, 3, 4 (CO)
Pin 6 in row 5 (GND
1
)
1. GND = ground
Normally closed Pin 3 in rows 1, 2, 3, 4 (NC)
Pin 6 in rows 1, 2, 3, 4 (NC)
Pin 1 in rows 1, 2, 3, 4 (CO)
Pin 4 in rows 1, 2, 3, 4 (CO