Mellanox Technologies MetroX TX6240, Руководство пользователя по оборудованию

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Interfaces Rev 1.1
Mellanox Technologies 46
3.2.1.5 ALARM Ports and Connectors
The MEX6200 has an ALARM (or External Alarm) port for the environmental alarm. This port
supports one input and one output.
The ALARM connector of the MEX6200 is a 9 pin D-type female connector that is used to con-
nect to the external alarm system (for example, a buzzer) of the customer.
The ALARM connector provides two connectivity methods:
• Normally Open
• Normally Closed
The connector is wired in accordance with the following table
Table 17 - ALARM Interfaces, Pin Function
Pin Designation Function
1 ALARM Normally Open
(ALARM1_NO) In normal operation, pin 6 (ALARM Com-
mon) is internally connected to pin 2
(ALARM Normally Closed).
Upon a Major alarm event, the internal con-
nection of pin 6 (ALARM Common) is
switched to this pin (pin 1).
2 ALARM Normally Closed
(ALARM1_NC) In normal operation, pin 6 (ALARM Com-
mon) is internally connected to this pin (pin
2).
Upon a Major or Critical alarm event, the
internal connection of pin 6 (ALARM Com-
mon) is switched to pin 1 (Alarm Normally
Open)
6 ALARM Common (ALARM1_COM) Common signal
3 Internally connected to GND.
7 ALARM IN 1 Input External Alarm
8 ALARM IN 2 Not connected
4 (
a
)
ALARM Normally Open
(ALARM2_NO) In normal operation, pin 9 (ALARM Com-
mon) is internally connected to pin 5 (Alarm
Normally Closed).
Upon a Major alarm event, the internal con-
nection of pin 9 (ALARM Common) is
switched to this pin (pin 4).
5
(a.) ALARM Normally Closed
(ALARM2_NC) In normal operation, pin 9 (ALARM Com-
mon) is internally connected to this pin (pin
5).
Upon a Major alarm event, the internal con-
nection of the pin 9 (ALARM Common) is
switched to pin 4 (ALARM Normally Open).
9
(a.) ALARM Common (ALARM2_COM) Common signal