Operating Details; Battery Charging; Powering Up; Figure 11. Front Panel - Telecast Adder 882 Instruction Manual

Operating Details

Battery Charging

Charge the internal UPS batteries at a minimum 13.8 VDC for 16 hours (40 mA trickle charge) by
attaching each unit to its external power supply. This will permit battery operation for up to
20 minutes during line power losses.
Indicators
The three LEDs on the front panel are shown in Figure 11.
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EXTERNAL POWER
24 VDC is connected.
¥
INTERNAL RESERVE
battery is adequately charged. This LED lights after one half hour of charge. There may be a
few minutes of reserve after the indicators extinguish. This LED is illuminated red when the
internal battery is discharging.
. This red LED is on when the Þber optic link is not properly attached, or the
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LINK STATUS
system units are not communicating properly. This indicator is meaningful only if one of the
other two LEDs is on.
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AUDIBLE ALARM
LED indicators on the front panel. This alarm alerts the user that the internal batteries are
discharging. A defeat switch for the audible alarm is located inside the unit on the main circuit
board.

Powering Up

Note: A locking switch is provided to prevent inadvertent power turn off. Never try to move the
front panel switch without Þrst pulling on the switch lever to disengage its lock.
With power OFF at both units, check all electrical and optical connections as described in
Installation on page 3. Firmly seat and latch all connectors. To operate the power switch:
1. Pull the lever away from the panel.
2. Move it up for power ON, or down for power OFF.
The power switches at both units must be on for the system to achieve normal function.
3. Switch on the power to both Adder 882 units.
Verify that the green
LEDs do not light. If you do not get this result, refer to the Troubleshooting Chart on page 16.
Operating Details
EXTERNAL
ON
POWER
OFF
LINK STATUS
INTERNAL
POWER
RESERVE

Figure 11. Front Panel

. When this green LED is illuminated, an external supply of between 12 and
. This LED is illuminated green when the power is on and the internal
. An audible alarm has been incorporated into the Adder 882 in addition to the
EXTERNAL POWER
ADDER
LEDs are illuminated, and that the red
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882
AUDIO/DATA MUX/DEMUX
Tel eca st
Fiber Systems, Inc.
LINK STATUS
Telecast
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