Repair GE-Emerson IC697PWR720 Series 90-70 Power Supply Adapter Module

The GE-Emerson IC697PWR720 Series 90-70 Power Supply Adapter Module must be connected to an external power supply through a cable. The external power supply can be an IC697 power supply module or another external power supply.

The +5, +12, and ±12 VDC outputs, as well as the 5V remote sense, which are generated by an external power supply, are connected to the IC697 rack backplane through the PSA. The maximum currents that can be supplied to the backplane through the PSA are 18 Amps on the +5Voutput, 2 Amps on the +12V output, and 1 Amp on the ±12V output.

The PSA monitors the +5V output and the TTL-compatible Input Power OK signal (TTL) from the external power supply. The Input Power OK signal (TTL) indicates that the external power supply input voltage is adequate to maintain hold-up time for an orderly system shutdown. The PSA also develops two backplane signals, ACFAIL* and SYSRESET*, which are for the power-up/power-down sequence.

The external power supply must provide adequate hold-up time (5.05 milliseconds minimum, per ANSI/IEEE STD1014-1987) as well as an Input Power OK signal (TTL) to ensure an orderly system shutdown when power is removed.

It is recommended that the external power supply have a +5V Remote Sense. When the Remote Sense is connected to the PSA terminal board (positive remote sense to +5VS and negative to 0VS) the +5 volts at the backplane will be regulated to the level set by the power supply.