REAR PANEL IN/OUT CONNECTOR PINS FUNCTION DESCRIPTION
Refer to the following table for description of the control and supervisory signals provided at the rear In/Out connector.
Refer to Fig. 1-1~6-1 for typical connections for operation.
Pin No
Function
1
V_TRIM_B
2
TEMP_ALARM_B
3
DC_OK_B
4
TEMP_ALARM_A
5
ON/OFF_A
6
DC_OK_A
7
V_TRIM_A
8
+12V_AUX
9
CS
10
V_TRIM_C
11
SIGNAL_RETURN
12
DC_OK_C
13
+SENSE
14
AC_FAIL_B
15
ON/OFF_B
16
AC_FAIL_A
17
NC
18
NC
19
NC
2
20
SCL (I
C)
2
21
SDA (I
C)
22
-SENSE
23
TEMP_ALARM_C
24
AC_FAIL_C
25
ON/OFF_C
22
Description
Connection for output voltage trimming of FPS1000 unit "B". The voltage can be trimmed within
its range specifications.
Open collector signal, referenced to pin 11 (Signal Return). On when the internal temperature of
FPS1000 unit "B" is within safe limit, Off approx. 10°C below Thermal shut down. The maximum
sink current is 10mA and the maximum external voltage is 15V.
Open collector signal, referenced to pin 11 (Signal Return). On when the output voltage of
FPS1000 unit "B" is higher than Vout ≥ 80% +/-5%. The maximum sink current: 10mA and the
maximum external voltage is 15V.
Open collector signal, referenced to pin 11 (Signal Return). On when the internal temperature of
FPS1000 unit "A" is within safe limit, Off approx. 10°C below Thermal shut down. The maximum
sink current is 10mA and the maximum external voltage is 15V.
Turns the output of FPS1000 unit "A" to On and Off by electrical signal or dry contact between
pin 5 and pin 11 (Signal Return). 0~0.6V or Short: On, 2~15V or Open: Off.
The maximum sink current is 2.6 mA
Open collector signal, referenced to pin 11 (Signal Return). On when the output voltage of
FPS1000 unit "A" is higher than Vout ≥ 80% +/-5%. The maximum sink current: 10mA and the
maximum external voltage is 15V.
Connection for output voltage trimming of FPS1000 unit "A". The voltage can be trimmed within
its range specifications.
Auxiliary voltage output, 11.2~12.5V, referenced to pin 11 (Signal Return). The maximum load
current is 0.25A. This output has built in Oring diode and is not controlled by the On/Off control.
Current sharing signal. When FPS-S1U racks are connected in parallel, the CS pins of the units
should be connected to allow current balance between units.
Connection for output voltage trimming of FPS1000 unit "C". The voltage can be trimmed within
its range specifications.
Return for the following control and supervisory signals: On/Off, DC_OK, Over_temperature
Alarm, AC_Fail, Auxiliary 12V supply. The Signal return is isolated from the output terminals.
Open collector signal, referenced to pin 11 (Signal Return). On when the output voltage of
FPS1000 unit "C" is higher than Vout ≥ 80% +/-5%. The maximum sink current: 10mA and the
maximum external voltage is 15V.
Positive sensing. The +Sense signal should be connected to the positive terminal of the load.
The +Sense and -Sense leads should be twisted pair to minimize noise pick-up effect. The
maximum load wires drop compensation is 1V/wire.
Open collector signal, referenced to pin 11 (Signal Return). On when the input voltage of
FPS1000 unit "B" is ≥85Vrms. The maximum sink current is 10mA, and the maximum external
voltage is 15Vdc.
Turns the output of FPS1000 unit "B" to On and Off by electrical signal or dry contact between
pin 15 and pin 11 (Signal Return). 0~0.6V or Short: On, 2~15V or Open: Off.
The maximum sink current is 2.6 mA
Open collector signal, referenced to pin 11 (Signal Return). On when the input voltage of
FPS1000 unit "A" is ≥85Vrms. The maximum sink current is 10mA, and the maximum external
voltage is 15Vdc.
Not connected
Not connected
Not connected
Serial Clock used in the I
FPS1000 Instruction Manual.
Serial Data used in the I
FPS1000 Instruction Manual.
Negative sensing. The -Sense signal should be connected to the negative terminal of the load.
The -Sense and +Sense leads should be twisted pair to minimize noise pick-up effect. The
maximum load wires drop compensation is 1V/wire.
Open collector signal, referenced to pin 11 (Signal Return). On when the internal temperature of
FPS1000 unit "C" is within safe limit, Off approx. 10°C below Thermal shut down. The maximum
sink current is 10mA and the maximum external voltage is 15V.
Open collector signal, referenced to pin 11 (Signal Return). On when the input voltage of
FPS1000 unit "C" is ≥85Vrms. The maximum sink current is 10mA, and the maximum external
voltage is 15Vdc.
Turns the output of FPS1000 unit "C" to On and Off by electrical signal or dry contact between
pin 25 and pin 11 (Signal Return). 0~0.6V or Short: On, 2~15V or Open: Off.
The maximum sink current is 2.6 mA
Table 1: Rear In/Out connector pins function description (J1)
2
C interface option. Refer to the I
2
C interface option. Refer to the I
2
C interface description in the
2
C interface description in the