Grass Valley NV8500 Series v.3.5 - Manual (Page 125)

109
Alarms
The NV8500 series routers have system (i.e., router) alarm connections. The NV8300 power
supply frame
— used by the NV9280, NV8576, and NV8576-Plus — has power supply alarm
connections.
These alarm signals can be delivered to external equipment that notifies technicians when an
alarm condition occurs. Creation of an external alarm indicator is outside the scope of this
manual, however basic instructions on wiring the alarm connection for external monitoring are
provided.
The router sends alarm information to the router control system through its control card(s). The
control card reads the status of an external power supply frame if it has one and monitors the
router’s power supply, fans, and reference connections. You can view both power supply status
and router status using MRC. (See the Miranda Router Configurator User’s Guide.)
Topics
Power Supply Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
System Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Making Alarm Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Power Supply Alarms
NV8300 Power Supply Alarms
The NV8300 frame has 2 power supply monitoring connectors and a power supply alarm
connector. The monitor connectors are DB25s. One of these connects to an NV8280, NV8576, or
NV8576-Plus router frame. The other DB25 connects to a DB25 on another NV8300 frame in
cases where two NV8300s are required to power a router frame (as for the NV8576 and NV8576-
Plus). The DB25 connections feed alarm status to the router which then feeds the status infor-
mation to the router control system or to MRC.
The alarm connector that you can use for your own circuitry is a DE9 at the rear of the NV8300
frame. It provides alarm status for each of the 4 power supplies in the NV8300 frame. It is this
connector you use to create a power supply alarm indicator.
Fig. 7-1: NV8300 Power Supply Alarms Connector
As a reminder, the NV8300 power supply frame has 4 power supply slots, numbered as shown
above, as viewed from the front of the frame. PS2 is redundant to PS1; PS4 is redundant to PS3.
1 2 3 4 5
6 7 8 9
1
2
3
4 PS1
PS1 COM
PS2
PS2 COM 5
6
7
8
9 PS3
PS3 COM
PS4
PS4 COM
n.c.
PS3
PS1
PS4
PS2