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Unless defined otherwise, all control signals shall be TTL compatible with respect to the output return and shall be isolated from

the primary circuit and be SELV rated. All input signals shall be driven from an open collector with the pull-up resistor located in the

power supply and shall be capable of sourcing up to 4 mA. Unless otherwise specified, signal levels for parameters listed in the

table below are general LVTTL signals.

A0, A1

PMBus selected address Pin.

SDA, SCL

SMB_ALERT_L

Output alert signal. It shall be an open collector with the pull-up resistor located at the receiving end. This signal

will be asserted due to fault or warning events. High = Normal, Low = Alert, Refer to Figure 5.

Current share signal. The PSU can operate at redundant mode by connecting V1_Ishare signal of each power

supply together.

Remote Sense signal for V1, V1_VS_SENSE is positive sense, V1_VS_SENSE_RTN is negative sense.

+VP

Source voltage located at receiving end. Provide a voltage for power good signal. Refer to Figure 6.

PW_OK_H

Output power good signal. It is isolated from the output. Goes high/low when output is within regulation. Refer to

Figure 6 (two methods for Power Good connection).

INHIBIT_L, INHIBIT_L_RTN

Power up signal. It is isolated from the output. Apply a DC voltage between INHIBIT_ L and INHIBIT_L_RTN can

power up the unit. Refer to Figure 6.

Figure 5. SMB_ALERT_L Connections