Grass Valley NV8288 v.1.5 - Manual (Page 58)

48 Rev 1.5 • 24 Sep 09
3. Installation
Making Alarm Connections
4 On the rear of the router, locate the ‘ALARMS’ connection, as shown in Figure 3-22.
Figure 3-22. System Alarm Connection on Router (Rear View)
5 Connect to the ‘ALARMS’ connection using a DE9 connector and cable.
6 Connect the other end of the cable to an external alarm indicator. See Router on page 50 for
information on wiring the DE9 connector.
External Alarm Indicators
An external alarm indicator can be created to display visual cues when a failure has occurred on the
power supply or on the router frame. The indicator usually contains different LEDs that indicates
what specific router module has failed with each LED wired to specific pins on a DE9 connector.
Each LED indicates what specific router module has failed. 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.
NV6257
The ‘Alarms’ connection on the rear of the NV6257 uses a DB25 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. If
a PS6000 power supply module is removed, the alarm circuit remains open.
For an external alarm indicator box, connect to the ‘Alarms’ connection using a DB25 female con-
nector, wiring as shown in Figure 3-23. Each pin monitors a specific function and activates a spe-
cific alarm.
RTR EXPANSION
E146905
10/100 BT
10/100 BT RTR EXPANSION
VIDEO
REF 1
LOOP
VIDEO
REF 2
LOOP
AUX 1
AUX 2
CTRL 1
CTRL 1
CTRL 2
CTRL 2 ALARMS
POWER SUPPLY
MONITORS
POWER INPUT
TIME
CODE
PRI
CTRL
SEC
CTRL
PRI CTRL
SEC CTRL
DIAG (38.4 Kbaud)
DIAG (38.4 Kbaud)
System Alarm
Connector