Rear of the HNC

Depending on the model of the SE server, different HNC variants are available: HNC M3 in SE710, HNC M4 in SE730 resp. HNC M5 in SE730B.

HNC M3

Figure 40: HNC M3 (SE710) - rear

ID/CSS/Global error indicator

Figure 41: ID/CSS/Global error indicator (HNC M3)

No.	Meaning
1	ID/CSS/Global error indicator

Element	Meaning
ID	ID indicator (blue) Lights up blue when the HNC has been selected by pressing the ID button. To deactivate, press the button again.
CSS	CSS and Global error indicator (yellow/orange)
	Generally, the states of these indicators have the following meanings: Do not light up when the HNC is OK. If the event is still acute after a power failure, the indicator is activated after the restart. Light up when a prefailure event was detected. The indicator also lights up in standby mode. Flash when an error was detected. The indicator also flashes in standby mode. Irrespective of the color, when an indicator lights up or flashes this indicates an error event. Please notify customer support.

LAN indicators

Figure 42: LAN indicators (HNC M3)

No.	Meaning
1	LAN activity indicator Lights up green if a LAN connection exists. Does not light up if no LAN connection exists. Flashes green when a LAN transfer is in progress.
2	LAN speed indicator Lights up yellow for a LAN transfer rate of 1 Gbps. Lights up green for a LAN transfer rate of 100 Mbps. Does not light up for a LAN transfer rate of 10 Mbps.

Indicator on hot-plug power supply unit

Figure 43: Indicator on hot-plug power supply unit

No.

Meaning

1

Indicator on hot-plug power supply unit (two colors) Flashes green when the HNC is switched off, but line voltage is present (standby mode). Lights up green when the HNC is switched on and functioning properly. Flashes orange when a predictable error has been detected, but the power supply unit is still running.1) Lights up orange when no line voltage is present or the power supply unit has failed.

1)	The following events are detected as predictable errors: The temperature is very high. The power consumption is very high. The current strength is very high. The fan speed is very low In each of these cases please notify Customer Support.

PCIe slot assignment of HNC M3

Figure 44: HNC M3 (SE710) - principle of PCIe slot assignment at the rear of the device

PCIe slot	Assignment
1	SAS RAID controller for internal HDDs
2	optional 4-port LAN card (10 GBit) with RJ45 interfaces or 4-port LAN card (10 GBit) with optical interfaces
3	FibreChannel card
4	4-port LAN card (10 GBit) with RJ45 interfaces

HNC M4

Figure 45: HNC M4 (SE730) - rear

No.	Function
1	Up to two hot-plug power supply units
2	PCIe slot 3
3	PCIe slot 2
4	PCIe slot 1
5	OCP module 1
6	I/O panel
7	OCP module 2 (unused)

PCIe slot assignment of HNC M4

Figure 46: HNC M4 (SE730) - principle of PCIe slot assignment at the rear of the device

HNC M5

Figure 47: HNC M5 (SE730B) - rear

No.	Function
1	Up to two hot-plug power supply units
2	PCIe slot 3
3	PCIe slot 2
4	PCIe slot 1
5	OCP module 1
6	I/O panel
7	OCP module 2 (generally unused; released for optional usage with X710-DA4 controller)

PCIe slot assignment of HNC M5

Figure 48: HNC M5 (SE730B) - principle of PCIe slot assignment at the rear of the device