The RX7i power supplies provide +5V, +12V, and -12V power, along with logic level sequencing signals to modules on the RX7i backplane. The power supply module plugs directly into the 47-pin connector provided in the leftmost slot in the RX7i rack. RX7i power supplies cannot be used in Series 90-70 expansion racks. The power supply output can ride through loss of up to one input line cycle without loss of output power.
Inrush current (cold start, 24 VDC): 100 amps maximum
Output Requirements:
Output Power: 300 watts maximum (total for all 3 outputs)
Output Voltage:
+5 VDC: 4.875 to 5.25 volts, 0 to 50 amps
+12 VDC: 11.64 to 12.6 volts, 0 to 10 amps
-12 VDC: -12.60 to -11.64 volts, 0 to 4 amps
Isolation, input to all outputs: 250 VAC continuous; 1500 VAC for 1 minute
Protective Limits:
Overvoltage Limit:
+5 VDC Output: 5.7 to 6.7 volts
Overcurrent Limit:
+5 VDC output: 65 A typical
+12 VDC output: 15 A typical
-12 VDC output: 6 A typical
Ride-through (time allowed for loss of input power without affecting DC outputs): 15 milliseconds minimum
Holdup Time (time from ACFAIL# system failure signal is activated to when any DC output drops out of specification): 5 milliseconds minimum
Operating Temperature: 0°C to 60°C (32°F to 140°F). Fan tray attachment required for full capacity. For operation without forced-air cooling, refer to the temperature derating curve on page 2-14.
