Module Power; Clearance And Creepage Distances - Digital Equipment 300 Series AXP Reference Manual

Host Power You must ensure that the total power drawn by the approved
Rating module, the host, and other auxiliary equipment drawing power
from the host, is within the rating of the host power supply.
Digital has designed all permutations of the host configuration
(including the DEC 3000 Model 300 Series AXP Systems) to
operate within the limits of the host power rating, as shown in
Table F–2.
Table F–2 Module Power
Nominal
Voltage
+12.1V
–12.0V
1
2
as specified in the TURBOchannel hardware specification.
Module Digital has ensured that when the system module is installed
Isolation within the DEC 3000 Model 300 Series AXP Systems, the
clearance and creepage distances to the host are met. Clearance
is the shortest distance in air between two points. Creepage is
the shortest distance along a continuous surface between those
same two points.
Creepage distances apply when the system module is installed in
a controlled environment. You can check creepage distances by
measuring the distance between adjacent parts.
If in doubt, you should seek the advice of a telecoms safety
engineer. Failure to install the system module in accordance
with these instructions will invalidate the approval.
Maximum
Voltage
(Volts)
+5.1V +4.896
+11.616
–11.4
Without TURBOchannel options slots populated.
With two TURBOchannel options slots populated. This is a worst-case situation
Appendix Overview
Maximum
Maximum Input
Voltage Current
(Volts) (Amperage)
+5.304 16.0
+12.584 0.8
–12.6 0.1
Maximum
Input
Current
1 2
(Amperage)
24.0
1.8
0.1
F–3