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Shelf Management
60
R1.0, October 2018
Table 16: Backplane connector (J1) and (J2) pin description
-48V_A
-48 VDC supply A
-48V_B
-48 VDC supply B
AIR_FILT_PR
Air filter presence (grounded by air filter presence switch to detect a missing air
filter)
CROSS_SCL_A
Serial Clock of IPMB-A, cross-connected on Backplane to serial clock of IPMB-
B of other Shelf Manager
CROSS_SCL_B
Serial Clock of IPMB-B, cross-connected on Backplane to serial clock of IPMB-
A of other Shelf Manager
CROSS_SDA_A
Serial Data of IPMB-A, cross-connected on Backplane to serial data of IPMB-B
of other Shelf Manager
CROSS_SDA_B
Serial Data of IPMB-B, cross-connected on Backplane to serial data of IPMB-A
of other Shelf Manager
E-)
Ethernet interface (ETH0)
E-)
Ethernet interface (ETH0)
E-)
Ethernet interface (ETH1)
E-)
Ethernet interface (ETH1)
FAN_24V
Auxiliary 24 VDC (max. 100 mA) generated on Fan Trays (Voltage supply for
opto-couplers on Shelf Manager)
FAN_24V_RTN
Return path (Ground reference) for the auxiliary 24 VDC, generated on Fan
Trays, used also as reference ground for the fan control voltage
FAN_PRES[0...2]
Fan Tray present (grounded on Fan Tray when present)
FAN_SPEED
DC for Fan Speed Control (0 V to 10 V, 10 mA)
FAN_TACH[0...8]
Tachometer signals from Fan Trays
GND
logic ground
HA[0]
Hardware address of Shelf Manager
- grounded: Shelf Manager IPMI address is 0x10
- open: Shelf Manager IPMI address is 0x12
HA7
Hardware address of Shelf Manager
- grounded: Shelf Manager IPMI address is 0x10
- open: Shelf Manager IPMI address is 0x12
HLY_Input#
Health input Shelf Manager (proprietary signal cross-connected on Backplane
to HLY_Output of other Shelf Manager)
HLY_Output#
Health output Shelf Manager (proprietary signal cross-connected on Back-
plane to HLY_Input of other Shelf Manager)
HS_EN
Tells the Shelf Manager that it is plugged in (Grounded on Backplane)
I2C_PWR_A
3.6 V (max. 500 mA) generated on Shelf Manager, redundant path A for Shelf
I
2
C-devices on Fan Trays, PEMs and SAP
I2C_PWR_B
3.6 V (max. 500 mA) generated on Shelf Manager, redundant path B for Shelf
I
2
C-devices on Fan Trays, PEMs and SAP
INT#
External Interrupt request (Master Only I
2
C-bus)
INV_ACTIVE
This ShMM is in active mode (inverted signal of ShMM)
I2C_SCL_CH0
Master Only-I
2
C-bus Channel 0 to SAP
I2C_SCL_CH1
Master-Only I
2
C-bus Channel 1
I2C_SCL_CH2
Master-Only I
2
C-bus Channel 2
I2C_SCL_CH3
Master-Only I
2
C-bus Channel 3
