Honeywell Mark III manual 3 28 Vdc Backup Input Power Requirements, Power Interrupt Requirements

Nominal	+27.5 Vdc	Nominal	50 Watts
Minimum	+20.5 Vdc	Maximum	100 Watts
Maximum	+32.2 Vdc

5.5.3 28 Vdc Backup Input Power Requirements

The MARK III does not require use of standby 28 Vdc Battery Backup Input Power.

5.5.4 Power Interrupt Requirements

The MARK III shall be capable of continuous operation through any power-off transient under 200 milliseconds. Non-volatile data shall be unaffected by Input Power Loss and does not depend upon a standby 28 Vdc Battery Bus, if the aircraft is so equipped.

HONEYWELL Aerospace Electronic Systems Page 56

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