Rack power and cooling location codes (Models 941, 94E)

Use Table 1 to find the part of the rack power and cooling system for which you seek location code information. For part numbers, see Rack power and cooling part numbers, Models 941, 94E.

Table 1. Rack power and cooling location codes
Part	See
Locations overview Base rack Expansion rack	Figure 1 Figure 2
Battery module set	Figure 7
DASD fan tray assembly	Figure 9
Fan sense card	Figure 10
Local remote switch card	Figure 11
Primary power supply (PPS) Front 208VDC base module Fans PFC module Rear 5/12V DDM power module AC input power module Booster power module Sequencer module	Figure 3 Figure 4
Rack identity card	Figure 13
RPC card	Figure 14
System z® local remote switch card	Figure 12

Overview of locations (base rack)

Table 2. Location codes for a base rack
Location code	Part name
E08	DC power bus bar A (longer, connects to PPS1)
E09	DC power bus bar B (shorter, connects to PPS2)
E10 thru E12	Battery module enclosure
E1 (PPS1 / cpPPS10)	Primary power supply (upper)
E2 (PPS2 / cpPPS11)	Primary power supply (lower)
U789D.001.sssssss	CEC enclosure
U1400.rBn.sssssss	I/O enclosure
U2`nnn`.D01.sssssss	Storage enclosure

Table 3. Location codes for an expansion rack
Location code	Part name
E08	DC power bus bar A (longer, connects to PPS1)
E09	DC power bus bar B (shorter, connects to PPS2)
E10 thru E12	Battery module
E1 (PPS1 / cpPPSx0 where x = rack #)	Primary power supply (upper)
E2 (PPS2 / cpPPSx1 where x = rack #)	Primary power supply (lower)
U1400.rBn.sssssss	I/O enclosure
U2`nnn`.D01.sssssss	Storage enclosure

Table 4. PPS locations (front)
Location code	Part name	Connector
U2`nnn`.mmm.sssssss-Ex¹	Primary power supply (PPS)
U2`nnn`.mmm.sssssss-Ex-A1	PPS fan (top)	Power/signal
U2`nnn`.mmm.sssssss-Ex-A2	PPS fan (middle)	Power/signal
U2`nnn`.mmm.sssssss-Ex-A3	PPS fan (bottom)	Power/signal
²	208VDC base module
²	PFC module
Notes: Where x is 1 = top PPS; where x is 2 = bottom PPS. A code is not associated with the location of this part. The part is shown only for reference.

Table 5. PPS locations (rear)
Location code	Part name	Connector
U2`nnn`.mmm.sssssss-Ex¹	Primary power supply (PPS)
U2`nnn`.mmm.sssssss-Ex-E1	5/12V DDM power module
U2`nnn`.mmm.sssssss-Ex-E2	Booster power module (optional)
U2`nnn`.mmm.sssssss-Ex-E3	5/12V DDM power module (optional)²
³	AC input power module⁴
U2`nnn`.mmm.sssssss-Ex-S1	Sequencer module⁵
Notes: Where x is 1 = top PPS; where x is 2 = bottom PPS. Expansion rack with room for 16 storage enclosures. A code is not associated with the location of this part. The part is shown only for reference. For details, see Figure 5. For details, see Figure 6.

A code is not associated with the location of the parts on the AC input power module. These parts are shown only for reference.

Table 6. Sequencer module locations
Location code	Part name	Connector
U2`nnn`.mmm.sssssss-Ex	Sequencer module
U2`nnn`.mmm.sssssss-Ex-T1		RPC 1 communication
U2`nnn`.mmm.sssssss-Ex-T2		RPC 2 communication
U2`nnn`.mmm.sssssss-Ex-T3		PPS to PPS communication
U2`nnn`.mmm.sssssss-Ex-T4		UEPO loop
U2`nnn`.mmm.sssssss-Ex-T5		Rack identity card
U2`nnn`.mmm.sssssss-Ex-T6		Battery backup unit interface
U2`nnn`.mmm.sssssss-Ex-T7		Battery backup unit charge
J8-1 (not a location code)		208 VDC to bus bars for CEC and I/O enclosures
J8-2 (Not a location code. Connector may not be present on some hardware levels.)		208 VDC to bus bars for CEC and I/O enclosures
U2`nnn`.mmm.sssssss-Ex-T9		208 VDC to management console and Ethernet switches
U2`nnn`.mmm.sssssss-Ex-T10		208 VDC to management console and Ethernet switches
U2`nnn`.mmm.sssssss-Ex-T11		Fan sense card
U2`nnn`.mmm.sssssss-Ex-T12		Fan sense card

Table 7. Battery module enclosure locations (rear)
Location code	Part name	Connector
U2`nnn`.mmm.sssssss-E1x-E1 x = 0 (top position) x = 1 (middle position) x = 2 (bottom position)	Battery module enclosure
U2`nnn`.mmm.sssssss-E1x-E2	Battery module set (3 battery modules in a battery module enclosure)
U2`nnn`.mmm.sssssss-E1x-T1		208VDC bus bar (to bus bar A)
U2`nnn`.mmm.sssssss-E1x-T2		208VDC bus bar (to bus bar B)
U2`nnn`.mmm.sssssss-E1x-T3		PPS charging
U2`nnn`.mmm.sssssss-E1x-T4		PPS charging
U2`nnn`.mmm.sssssss-E1x-T5		PPS control interface
U2`nnn`.mmm.sssssss-E1x-T6		PPS control interface
U2`nnn`.mmm.sssssss-E1x-A1	Battery module enclosure fan

Table 9. Fan sense card locations
Location code	Part name	Connector
U2`nnn`.mmm.sssssss-Cx (x = 3, front of rack) (x = 4, rear of rack)	Fan sense card
U2`nnn`.mmm.sssssss-Cx-T1		Storage enclosure
U2`nnn`.mmm.sssssss-Cx-T2		Storage enclosure
U2`nnn`.mmm.sssssss-Cx-T3		Storage enclosure
U2`nnn`.mmm.sssssss-Cx-T4		Storage enclosure
U2`nnn`.mmm.sssssss-Cx-T5		Storage enclosure
U2`nnn`.mmm.sssssss-Cx-T6		Storage enclosure
U2`nnn`.mmm.sssssss-Cx-T7		Storage enclosure
U2`nnn`.mmm.sssssss-Cx-T8		Storage enclosure
U2`nnn`.mmm.sssssss-Cx-T9		DASD fan tray
U2`nnn`.mmm.sssssss-Cx-T10		DASD fan tray
U2`nnn`.mmm.sssssss-Cx-T11		PPS
U2`nnn`.mmm.sssssss-Cx-T12		PPS
U2`nnn`.mmm.sssssss-Cx-T13		Fan sense card to fan sense card
U2`nnn`.mmm.sssssss-Cx-T14		Rack identity card

Table 10. Local remote switch card locations
Location code	Part name	Connector
U2`nnn`.mmm.sssssss-C6	Local remote switch card

Table 11. System z local remote switch card locations
Location code	Part name	Connector
U2`nnn`.mmm.sssssss-C6	System z local remote switch card

Table 12. Rack identity card locations
Location code	Part name	Connector
U2`nnn`.mmm.sssssss-C5	Rack identity card (right from rear view)
U2`nnn`.mmm.sssssss-C5-T1		Fan sense card, front
U2`nnn`.mmm.sssssss-C5-T2		Fan sense card, rear