Grass Valley NV9700 v.1.3 - Manual (Page 5)

NV9700 • User’s Guide 5
NV9700
Discussion Points
Relay Connections
There are 7 relay outputs. Each can switch a fairly heavy load:
(Relay specifications are on page 10.)
Each relay has power (+) and ground (–) terminals on the DB25 connector. The DB25 connector
also has a number of additional ground terminals which you might want to connect to earth ground.
There are ‘alarm’ relays for controllers 1 and 2, ‘active’ relays for controllers 1 and 2, and ‘health’
relays for controllers 1 and 2. The relays are active when the LEDs are on and inactive when the
LEDs are off.
A seventh relay is analogous to the buzzer: that relay switches on during any alarm condition for
either controller and switches off if there is no alarm condition. Unlike the buzzer, the relay is not
deactivated by the mute button and is not enabled or disabled by a DIP switch.
Discussion Points
The NV9700 is a very simple device. It displays the status of your system controllers. It illuminates
an alarm LED when a system controller has a problem. If the buzzer is enabled, an alarm condition
sounds the buzzer. The buzzer continues to sound until someone mutes it.
When Failure Occurs
The NV9700 itself could fail. If the power supply LEDs are not illuminated, the panel has lost
power. If the ‘Panel Health’ LED is not illuminated, the NV9700 is malfunctioning. Ensure that the
NV9700 is powered up and functioning before continuing.
If a system controller fails (i.e., the red alarm LED is on), you will probably need to use the ‘Sys-
tem Management’ page of NV9000-SE Utilities to review system status and to restart system con-
trollers.
Before doing anything else, check the obvious:
• Are the serial cables (between the NV9700 and the system controllers) connected?
• Are both system controllers powered up and running?
If both these conditions are met, and the alarms are still present, then you must perform further
investigation to determine the cause of the failure and correct it.
– + – + – + – + – + – + – +
1 2 1 2 1 2
Active Health Alarm Buzzer
13 1
14 25
–
+ Logic
External Power,
200V max, 130 mA max
+5V
Optical
Isolation
External lamp or load
External Ground
+
–