IBM BladeCenter T Series, Installation Manual

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v Alarms connector: The LAN module provides one telco DB15 alarms
connector (male) for critical, major, and minor telco alarms. Each of the
alarms has a relay that enables multiple system alarm indicators to be
daisy-chained together. Table 1 shows the pinouts for the telco alarms
connector.
Alarms
1 8
9 15
Note: The service processor, management module, or systems-management
function must monitor the alarm reset inputs to maintain the fault
condition that you set for the unit. The alarm reset inputs can be
voltages in excess of standard logic levels, so you must to electrically
or optically isolate them from the monitoring logic.
Table 1. Telco alarms connector pinout
Pin # Description I/O Pin # Description I/O
1 Minor alarm reset + I 9 Minor alarm normally
closed
O
2 Minor alarm reset - I 10 Minor alarm common O
3 Major alarm reset + I 11 Major alarm normally
open
O
4 Major alarm reset - I 12 Major alarm normally
closed
O
5 Critical alarm normally open O 13 Major alarm common O
6 Critical alarm normally
closed
O 14 Reserved
7 Critical alarm common O 15 Reserved
8 Minor alarm normally open O
The electrical specifications for the alarms connector are as follows:
– Outputs
- Voltage range: 0 V dc to -100 V dc (maximum current 0.3 A at 100 V
dc)
- Current range: 0 A to 1 A (maximum voltage 30 V dc at 1 A)
- Worst-case VA: 1 A at -30 V dc (30 VA maximum) indefinitely
– Inputs
- Voltage range: 0 V dc to -100 V dc (including transients)
- Differential input voltage: 3 V dc to 72 V dc
– Reset input activation
Pulse width: 200 ms (minimum) to 300 ms
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BladeCenter T Management Module: Installation Guide