Power Connection; Alarm Interface; Provisioning I/O Alarm Contacts; Bits Interface - Cisco ONS 15327 User Documentation

Mechanical Interface Cards

13.4.1.3 Power Connection

Each MIC has one -48 VDC power terminal that uses spring terminal block connectors and accepts
#12-16 AWG wire (the NEC requires 12-14 AWG wire). To establish redundant power, install both MICs
and connect each one to a power source.

13.4.1.4 Alarm Interface

Each MIC has one Form C discrete external control. Connection to the external control uses an RJ-45
connector. Two wires of the RJ-45 connector are used for the external control, which defaults to the open
position. Each MIC also has three Form C discrete external alarm inputs. The alarm input connections
are made using the same RJ-45 connector as the external control. Six wires of the RJ-45 connector are
used for the external alarm input. Make the physical connections using the RJ-45 ALARM port on each
MIC (for additional information, refer to the
In CTC you can provision the six external alarm inputs (three on each MIC) and the two external controls
(one on each MIC), collectively referred to as alarm contacts. External alarm inputs are typically used
for external sensors such as open doors, temperature sensors, flood sensors, and other environmental
conditions. External controls are typically used to drive visual or audible devices such as bells and lights,
but they can control other devices such as generators, heaters, and fans. For provisioning information
about the external contacts, see the following section.

13.4.1.5 Provisioning I/O Alarm Contacts

You can program each of the six Form C external alarms (inputs) separately. They can be set to Alarm
on Closure or Alarm on Open. The alarm severity can be set to any of the levels (Critical, Major, Minor,
Not Alarmed, Not Reported). In addition to severity, you can set alarm type and virtual wire for alarm
contacts 1 – 4 and define when the alarm is raised. You can assign a 63-character alarm description for
display in the alarm log of the CTC. The alarm condition remains until the external input quits driving
the contact and you clear the alarm in the CTC. For instructions, refer to the
section on page
You can also program the two Form C external controls (outputs) separately. You can set them to close
when the specified alarm condition is triggered; the default condition for output alarms is the open
position. The alarm triggering conditions can be any ONS 15327 alarm condition including the
user-defined input alarms, severity-based (e.g. trigger when any Major alarm happens) alarms, or remote
alarms. CTC provisioning of this alarm-to-output-contact association is menu driven and includes alarms
and individual alarms within categories. The output contact electrical interface is 50 V 100, mA. For
procedures that provision external controls, refer to the

13.4.1.6 BITS Interface

Each MIC provides connection for one BITS clock input and one BITS clock output using an RJ-45
connector. Both use two wires of the RJ-45 connector.

13.4.2 MIC Specifications

•
Cisco ONS 15327 User Documentation, R3.3
13-10
7-17.
Environmental
– Operating Temperature: -40 to +65 degrees Celsius
Operating Humidity: 5 - 95%, non-condensing
–
"Alarm Cable Installation" section on page
"Using Virtual Wires" section on page
Chapter 13 Card Reference
1-27).
"Using Virtual Wires"
7-17.
June 2002