NEC Neax 2400 Imx Circuit Card Manual

							CHAPTER 2 ND-70182 (E)
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PA - P W 5 5 - A
Power
1. General Function
The PA-PW55-A (PWR) circuit card supplies operating power to circuit cards located in the PIM. The -48
V input power source, which is converted to +5 V, -5 V, and +12 V, is distributed to each circuit card in the
associated PIM. This card also has a Ringing Generator Unit (RGU), whose output frequency and voltage
can be selected from 20 Hz, 25 Hz, 75 Vrms, 90 Vrms by switch setting on this card. In addition, a Howler
Tone circuit resides on this card.
Figure 2-20   Location of PA-PW55-A (PWR) Card in the System
Note:The +80V input is required for activating Message Waiting Lamps (MWLs) .
HOW (For LC)CR (For LC)
+5V, +12V, -5V
DC-DC
RGU
HOW
SUB
PWR REL
NFB
PA-PW55-A (PWR)PA-PW54-A (DPWR)
-48 V (For LC, TRK)
DC-DC
RGU
HOW
SUB
PWRREL
NFB
-48 V
+80V (Option) 
Note
+80 V (For MWL) 
						

							ND-70182 (E) CHAPTER 2
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2. Mounting Location/Conditions
This circuit card is mounted in the following slots.
0001 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
PWR
(PA-PW55-A)
PIM
Mounting ModulePIM 
						

							CHAPTER 2 ND-70182 (E)
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3. Face Layout of Lamps, Switches, and Connectors
The face layout of lamps, switches, and connectors on this circuit card is shown in Figure 2-21.
Figure 2-21   Face Layout of PA-PW55-A Card
-48V SW
FUSE
FUSE
SIDE VIEWSW4
FRONT VIEW
PA-
PW55
-A
5.0
A
0.5
A
RGUOUT
0.5A
125V
AC/DC +80VOUT
5A
125V
AC/DC
-48VOUT
25A
AC250V
DC125V RST MB -48V
DC
INPUT-48V
SW-48V
IN
CONN
25A
+80V ON
-48V ON
RGU ON
DC ON
OPE
DC ALM CPU ALM
RGU ALM
HOW ALM
U
P(          ) 
						

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4. Lamp Indications
Lamp indications for this circuit card are shown in the table below.
5. Switch Settings
This circuit card has the following switches.
6. External Interface
No cable connections are required.
LAMP NAME COLOR STATE
+80V ON Green Remains lit while +80 V input power is being supplied.
–48 V ON Green Remains lit while –48 V input power is being supplied.
RGU ON Green Remains lit while RGU output is in progress.
DC ON Green Remains lit while +5 V, +12 V, and –5 V are being output normally.
OPE Green Lights when information exchange with the CPU is possible.
CPUALM Red Lights when reset of the microprocessor has been activated.
DCALM Red Lights when +5 V, +12 V, or –5 V outputs alarm.
RGUALM Red Lights when RGU voltage alarm.
HOWALM Red Lights when howler alarm.
SWITCH 
NAMESWITCH
No.SETTINGSTANDARD 
SETTINGDESCRIPTION
–48 V SWON×–48 V input power is supplied.
OFF–48 V input power is not supplied.
RESETPUSH Hardware reset of the circuit card.
—×Normal setting
MB—ON Make-busy of the circuit card.
OFF×Normal setting
SW41ON Frequency of Ringing Signal: 25 [Hz]
OFF×Frequency of Ringing Signal: 20 [Hz]
2ON×Voltage of Ringing Signal: 90 [Vrms]
OFF Voltage of Ringing Signal: 75 [Vrms] 
						

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7. Switch Setting Sheet
SWITCH 
NAMESWITCH SHAPE REMARKS
–48 V
RESET
MB DOWN Circuit card Make-busy cancel.
SW420 [Hz]
90 [Vrms]
ON12 
						

							ND-70182 (E) CHAPTER 2
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PA - P W 5 5 - B
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PA - P W 5 5 - B
Power
1. General Function
The PA-PW55-B (PWR) circuit card supplies operating power to circuit cards accommodated in the PIM.
The -48V input power source, which is converted to +5V, -5V, and +12V, is distributed to each circuit card
in the associated PIM. This card is also equipped with a Ringing Generator Unit (RGU), whose output
frequency and voltage can be selected among 20Hz, 25Hz, 75Vrms, 90Vrms by switch setting on this card.
In addition, a Howler Tone circuit resides on this card.
Figure 2-22   Location of PA-PW55-B (PWR) Card Within the System
Note:The +80V input is required for activating Message Waiting Lamps (MWLs).
HOW (For LC)CR (For LC)
+5V, +12V, -5V
DC-DC
RGU
HOW
SUB
PWR REL
NFB
PA-PW55-B (PWR)PA-PW54-B (DPWR)
-48 V (For LC, TRK)
DC-DC
RGU
HOW
SUB
PWRREL
NFB
-48 V
+80V (Option) 
Note
+80 V (For MWL) 
						

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2. Mounting Location/Conditions
This circuit card is mounted in the following slots.
Mounting ModulePIM
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
PWR
(PA-PW55-B)
PIM 
						

							ND-70182 (E) CHAPTER 2
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3. Face Layout of Lamps, Switches, and Connectors
The face layout of lamps, switches, and connectors on this circuit card is shown in Figure 2-23.
Figure 2-23   Face Layout of PA-PW55-B Card
-48V SW
FUSE
FUSE
SIDE VIEW
FRONT VIEW
PA-
PW55
-B
5.0
A
0.5
A
RGUOUT
0.5A
125V
AC/DC +80VOUT
5A
125V
AC/DC
-48VOUT
25A
AC250V
DC125V RST MB -48V
DC
INPUT-48V
SW-48V
IN
CONN
20A
+80V ON
-48V ON
RGU ON
DC ON
OPE
DC ALM CPU ALM
RGU ALM
HOW ALM
U
P(          )
SW4 
						

							CHAPTER 2 ND-70182 (E)
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4. Lamp Indications
The contents of lamp indications on this circuit card are shown in the table below.
5. Switch Settings
This circuit card has the following switches.
6. External Interface
No cable connections are required.
LAMP NAME COLOR STATE
+80V ON Green Remains lit while +80 V input power is being supplied.
–48 V ON Green Remains lit while –48 V input power is being supplied.
RGU ON Green Remains lit while RGU output is in progress.
DC ON Green Remains lit while +5 V, +12 V, and –5 V are being output normally.
OPE Green Lights when information exchange with the CPU is possible.
CPUALM Red Lights when reset of the microprocessor has been activated.
DCALM Red Lights in the case of +5 V, +12 V, or –5 V outputs alarm.
RGUALM Red Lights in the case of RGU voltage alarm.
HOWALM Red Lights in the case of howler alarm.
SWITCH 
NAMESWITCH
No.SETTINGSTANDARD 
SETTINGDESCRIPTION
–48V SWON
×–48V input power is supplied.
OFF–48V input power is not supplied.
RESETPUSH Hardware reset of the circuit card.
—
×Normal setting
MB—ON Make busy of the circuit card.
OFF
×Normal setting
SW41ON Frequency of Ringing Signal: 25 [Hz]
OFF
×Frequency of Ringing Signal: 20 [Hz]
2ON
×Voltage of Ringing Signal: 90 [Vrms]
OFF Voltage of Ringing Signal: 75 [Vrms] 
						

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7. Switch Setting Sheet
SWITCH 
NAMESWITCH SHAPE REMARKS
–48 V
RESET
MB DOWN Circuit card make busy cancel
SW420 [Hz]
90 [Vrms]
ON12