User guide

Site preparation 4–11
Hitachi Unified Storage VM Block Module Hardware User Guide
Power connection diagrams
The following illustrations show the correct way to connect the PDUs to the
PDPs. When connected as shown, either of the AC inputs can fail and the
system will still operate normally.
Three USA NEMA L15 30P
twistlock
3 pole, 4 wire
A + B + C + gnd
240 V 30 A per
phase
6 UL489 15 A
2 pole
2 pole, 3 wire
220 VAC
A-B or B-C + gnd
APAC IEC 309, blue
3 pole, 4 wire
A + B + C + gnd
240 V 30 A per
phase
6 UL489 15 A
2 pole
2 pole, 3 wire
220 VAC
A-B, A-C, or B-C +
gnd
EMEA IEC 309, red
4 pole, 5 wire
A + B + C + Neut
+ gnd
415 V 16 A per
phase
316 A
2 pole
1 pole, 3 wire
200 VAC
A-N or B-N or
C-N + gnd
Required number of plugs in each PDU
per chassis
Controller chassis Drive chassis Same power cord
and plug for all
power supplies.
44
Required number of PDUs per rack Controller rack Drive rack Same power cord
and plug for all
PDPs.
44
NOTE: The numbers in this table were taken from the PDU manufacturer’s specifications. Detailed PDU
specifications are located in Appendix C. See PDU specifications on page C-6.
Phas
e
Location PDU Plug
Max
Voltage
Rating
Max
Current
Rating
No. of CB
per PDU
Breake
r
Rating
Power Supply
Receptacle