TOA Electronics FPS1000-12, FPS1000-24, FPS1000-32, FPS-S1U, FPS-T1U, FPS1000-48 SCL I2C

10.7.5 Control and monitoring signals connector

9	CS	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.
10	V_TRIM_C	Connection for output voltage trimming of FPS1000 unit "C". The voltage can be
		trimmed within its range specifications.
11	SIGNAL_RETURN	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.
12	DC_OK_C	Open collector signal, referenced to pin 11 (Signal Return). On when the output voltage
		of FPS1000 unit "C” is higher than ≥ 80%+/-5%. The maximum sink current: 10mA
		and the maximum external voltage is 15V.
13	+SENSE	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.
14	AC_FAIL_B	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.
15	ON/OFF_B	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 source current is 2.6mA.
16	AC_FAIL_A	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.
17	NC	Not connected
18	NC	Not connected
19	NC	Not connected
20	SCL (I2C)	Serial Clock used in the I2C interface option. Refer to the I2C interface description in
		the Chapter 7 in this Instruction Manual.
21	SDA (I2C)	Serial Data used in the I2C interface option. Refer to the I2C interface description in
		the Chapter 7 in this Instruction Manual.
22	-SENSE	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.
23	TEMP_ALARM_C	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.
24	AC_FAIL_C	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.
25	ON/OFF_C	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 source current is 2.6mA.

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