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Issue 6
Electra Elite
5 - 10
Installing Electronic Telephone Units
3.1.4
Connectors
Before programming System Data, the battery must be
connected to CN4 to allow memory retention if a power
failure or brownout occurs. If a brownout or power failure
does occur, and the battery backup circuit is not activated,
System Data resets to the default values, all stations in
the system reset to the default values, and all data
programmed on individual stations is cleared.
When a CPUB( )-U10 ETU is installed in the system, the
clock/calendar must be set. This also applies when
battery backup fails for any reason.
When CPUB( )-U10 ETU is removed for long term
storage, disconnect the battery from CN4. This prevents
the battery from discharging completely. The fully charged
battery retains memory for approximately 21 days.
The CPUB( )-U10 ETU has the following connectors:
CN1
Connects to the backboard
CN2
Connects to the ISA-bus
CN3
Connects to CN2 on the EXP-U10 ETU via
the expansion cable
CN4
Connects to the memory backup battery
via the battery cable (factory installed)
CN5
Connects to CN1 of the CLKG-U10 Unit
CN6
Connects to CN2 of the CLKG-U10 Unit
3.1.5
LED Indications
LED1 indications are listed below.
Blinking Red
Normal Operation
Steady Red
Operation Stopped (power on)
Off
No Power
LED2 indications are listed below.
Steady Red
System Power On
Off
No Power
Summary of Contents for Electra Elite 192
Page 2: ...SYSTEM HARDWARE MANUAL Stock Number 750363 Issue 6 Series 6000 192 ...
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Page 10: ...Regulatory Information ...
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Page 52: ...Issue 6 Electra Elite xxxii List of Tables THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 73: ...Electra Elite Issue 6 System Hardware Manual 1 21 THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 74: ...Issue 6 Electra Elite 1 22 Introduction ...
Page 96: ...Issue 6 Electra Elite 2 22 System Specifications ...
Page 104: ...Issue 6 Electra Elite 3 8 Hardware Requirements THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 213: ...Electra Elite Issue 6 System Hardware Manual 5 67 Figure 5 39 FMS 8 U10 ETU ...
Page 336: ...Issue 6 Electra Elite 7 54 Installing Optional Equipment THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 368: ...Issue 6 Electra Elite A 4 Glossary of Abbreviations THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 369: ...SYSTEM HARDWARE MANUAL NEC America Inc Issue 6 Series 6000 192 ...