Allied Telesis AT-9408LC/SP Installation Manual page 75

Table 14 lists the definitions for the RPS 21-pin D-combo port and
connector pins.
Table 14. RPS 21-pin D-combo Port and Connector Pin Definitions
AT-9400 Series Layer 2+ Gigabit Ethernet Switches Installation Guide
Pin Definition
1 Reserved
2 Fan 2 status
3 Fan 1 status
4 RPS status
5 Ground
6 Ground
7 RPS status
8 +12.0 VDC sense
9 Reserved
10 No connect
11 Ground
12 Ground
13 Ground
14 Ground
15 Ground
16 Ground
17 Ground
18 +12.0 VDC sense
19 Ground
20 No connect
A-1 +12.0 VDC
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