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Rev 2.2 • 27 Mar 10
2. Installation
Making Alarm Connections
3 Connect the other end of the cable to an external alarm indicator. See
for information on wiring the DE9 connector.
Alarm Indicator Equipment
An external alarm indicator can be created to display visual cues when a failure has occurred on the
NV8000 power supply or a NV8500 family router frame. LEDs can be wired to specific pins on a
DE9 connector. Each LED indicates what specific router module has failed.
• For NV8000 power supply alarms, see
• For NV8500 family router alarms, see
NV8000 Power Supply
The ‘Alarms’ connection on the rear of the NV8000 uses a DE9 connector. An “alarm” or ON con-
dition occurs when the connection between an alarm pin and Alarm_COM (common) opens. The
alarm turns OFF when the connection between Alarm_COM and the alarm pin closes again. If a
PS8100 power supply module is removed, the alarm circuit remains open.
For an external alarm indicator box, connect to the ‘Alarms’ connection using a DE9 female con-
nector, wiring as shown in Figure 2-29. Each pin monitors a specific function and activates a spe-
cific alarm.
Figure 2-29. NV8000 Power Supply Alarms Connection
Router Alarms
The ‘ALARM’ connection on the rear of the NV8500 family router frame uses a DE9 connector.
An “alarm” or ON condition occurs when the connection between an alarm pin and Alarm_COM
(common) opens. The alarm turns OFF when the connection between Alarm_COM and the alarm
pin closes again.
For connection examples, see the
NV6257 diagram. Connections may be
made for all 4 power supplies in the
NV8000 frame.
1
2
3
4
5
6
7
8
9
1
2
3
4
5
PS1
PS1 COM
PS2
PS2 COM
PS3
8
7
8
9
PS3 COM
PS4
PS4 COM
GND
Caution
The power supply for the alarm circuit must not exceed 30 VDC. Load resistor
values depend on power supply voltage.
Summary of Contents for NV8144
Page 10: ...x Rev 2 2 27 Mar 10 Table of Contents ...
Page 56: ...46 Rev 2 2 27 Mar 10 1 Introduction Frame Expansion ...
Page 104: ...94 Rev 2 2 27 Mar 10 2 Installation Verification ...
Page 106: ...96 Rev 2 2 27 Mar 10 3 Configuration ...
Page 110: ...100 Rev 2 2 27 Mar 10 4 Operation Setting Redundant Crosspoint Switching ...
Page 116: ...106 Rev 2 2 27 Mar 10 5 Maintenance Obtaining Service ...
Page 124: ...114 Rev 2 2 27 Mar 10 6 Technical Details Time Code Specifications ...
Page 128: ...118 Rev 2 2 27 Mar 10 7 Part Numbers ...
Page 140: ...130 Rev 2 2 27 Mar 10 Index ...