Alarm Port - Cisco 1120 Hardware Installation

Router Hardware Description
Hardware Features

Alarm Port

See Figure 5 on page 22
Attach the alarm port to an alarm system to monitor and trigger external alarm events. The router supports two alarm
inputs and two alarm outputs.
The alarm-trigger setting determines when an alarm is sent to the attached alarm system.
The alarm port has a rating of 30V DC, 1A.
Input Alarm Trigger Settings

Open-The open setting indicates that the normal router operating condition has an electrical current passing
through the alarm circuits (DRY contact closed). If this electrical current is no longer detected (DRY contact open),
an alarm is generated.

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
Connector and Cable Specifications, page

Normally Closed (NC)-This setting depends on the pinout of the cable that is connected to the alarm port. See
Connector and Cable Specifications, page
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
Specification
Connector type
Alarm input
Alarm output
Internal Hardware Features
This section describes router hardware features that are integrated into the router and which are not visible from the
router exterior. This section describes the following features:

Memory, page 31

Internal GPS Module, page 31

WiFi Short-Range Access Point, page 32

Real-Time Clock (RTC), page 33

Temperature Sensor, page 33
for the alarm port location.
Description
RJ-45
8 volts @ 1 mA
30 volts @ 1 A
95.
95.
30