FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
SUB-D Output Connector Pinout and Signal Specification
Output Connector
Description
Pin
Location
Type
Low level
High level
V max
I max
Overtemperature /
Fan Fail PSU1
Power Supply Present
PSU 1
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
1
2
Open
Pull up
10 V
10 mA
Resistor (1 kꢀ) connected to logic GND
Resistor (1 kꢀ) connected to logic GND
Power Supply Present
PSU 2
Open
Pull up
10 V
10 mA
3
4
5
Open
Overtemperature /
Fan Fail PSU 3
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
AC Fail /
Power down warning PSU 3
6
7
8
9
Power Supply Present
PSU 3
Open
Pull up
10 V
10 mA
Resistor (1 kꢀ) connected to logic GND
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
DC Fail /
Output voltage fault PSU 3
Overtemperature /
Fan Fail PSU 2
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
Sync_start_A , Active high
<7V off
< 9V
15V
10mA
The signals of several racks can be
connected together in such a way that all
supplies will be inhibited until the last supply has
recovered from its overcurrent condition,
referenced to logic GND
Synch._Start_A
10
Open
11
12
Active low (DC-DC stage off when pin is open or on
high potential)
<0.8 V
>2.0 V
10 V
3.5 mA
Output inhibit
PSU 1-3
Referenced to logic GND
Open or connected to Vo1+ at the load
Internally (PSU) connected to Vo1+ over 100 ꢀ
dU < 3 Vpp
30 mA
V sense +
V sense -
13
14
Open or connected to Vo1- at the load
Internally (PSU) connected to Vo1- over 100 ꢀ
dU < 3 Vpp
30 mA
Open
NC
15
16
17
18
19
NC
NC
NC
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
AC Fail/
Power-down warning PSU 1
20
21
22
23
24
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
DC Fail/
Output voltage fault PSU 1
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
AC Fail/
Power-down warning PSU 2
OC-output, protected by 16 V Zener diode
and a 10 ꢀ resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
DC Fail/
Output voltage fault PSU 2
I2C compatible signal
referenced to logic GND
DATA, I2C data line
5 V or 3.3 V logic
MCD10074 Rev. 1.2, 15-Apr-10
Page 12 of 17
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