user manual

6-8 Computer Group Literature Center Web Site

Subassembly Reference

Alarm Interface Connector (ALARM)

The alarm interface connector is located on the secondary side of the

backplane. Alarm signals are routed through the backplane to the ALARM

connector. The alarm board attaches to this connector by ribbon cable.

Floppy Drive Connectors (FDA, FDB)

The backplane supports two standard IDE floppy drives. The floppy drive

connectors, FDA and FDB, are located on the secondary side of the

backplane. FDA is controlled by domain A, and FDB is controlled by

domain B.

Table 6-5. ALARM Connector Pin Assignments

Pin Signal Pin Signal

1 ALM_A_CLK 2 GND

3 ALM_B_CLK 4 GND

5 ALM_A_DOUT# 6 ALM_A_5V

7 ALM_B_DOUT# 8 ALM_B_5V

9 ALM_A_FRAME# 10 ALM_B_FRAME#

11 ALM_A_DIN# 12

Table 6-6. FDA and FDB Pin Assignments

Pin Signal Signal Pin

1 GND Not Connected 2

3 GND Not Connected 4

5 Key (pin missing) Not Connected 6

7 GND F_[n]_INDEX# 8

9 GND F_[n]_MTRO# 10

11 GND F_[n]_DS1# 12