User's Manual

DEC. 2011—EFT REVIEW DRAFT—CISCO CONFIDENTIAL
2-19
Cisco 1240 Connected Grid Router Hardware Installation Guide
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Chapter 2 Router Hardware Description
Hardware Features Detailed Description
• Closed—The closed setting indicates that the normal router operating condition is that no electrical
current is passing through the alarm circuits (DRY contact open). If an electrical current is detected
(DRY contact closed), an alarm is generated.
Output Alarm Trigger Settings
• Normally Open (NO)—This setting depends on the pinout of the cable that is connected to the
alarm port. See the appendix
Connector and Cable Specifications for details.
• Normally Closed (NC)—This setting depends on the pinout of the cable that is connected to the
alarm port. See the appendix
Connector and Cable Specifications for details.
If interfaces fail or other non-fatal errors occur, the alarm port does not respond. Continue to use SNMP
to manage these types of errors.
Note Due to the RJ-45 pin spacing, the alarm port does not support AC signaling.
Specifications
Connected Grid Module Slots
The router has four module slots to support installation of up to four compatible Cisco Connected Grid
modules, for additional router WAN and LAN interfaces. Modules should be installed in the slots
according to the module slot numbers shown
Figure 2-14. For more information about installing
Cisco Connected Grid modules, see the corresponding installation and configuration guide for each
module.
Module Numbering
The router uses module numbering to identify the integrated and modular router components. Some
system software commands refer to the module numbers.
• Module 1 is the router supervisor engine (located on the CPU motherboard)
• Module 2 is the router’s integrated Ethernet switch module, which has four Fast Ethernet ports and
two Gigabit Ethernet ports.
• Modules 3-6 are Connected Grid modules installed in the router module slots with the
corresponding number (see
Figure 2-14).
Specification Description
Connector type
RJ-45
Alarm input
8 volts @ 1 mA
Alarm output
30 volts @ 1 A