Connector Defi Nitions; Power Supply Connectors; Secondary Power Connector; Nmi Button - Supermicro AS-2020A-8R User Manual

A+ Server 2020A-8R User's Manual
5-9 Connector Defi nitions

Power Supply Connectors

The primary power supply connector
(J1B4) on the H8DA8 meets the SSI
(Superset ATX) 24-pin specifi cation.
Refer to the table on the right for the
pin defi nitions of the ATX 24-pin power
connector.
Note: You must also connect the 8-
pin (JPW2) power connector to your
power supply (see below).
Secondary Power
Connector
In addition to the Primary ATX power
connector (above), the Secondary
12v 8-pin power connector at JPW2
must also be connected to your power
supply. See the table on the right for
pin defi nitions.

NMI Button

The non-maskable interrupt button
header is located on pins 19 and 20
of JF1. Refer to the table on the right
for pin defi nitions.

Power LED

The Power LED connection is located
on pins 15 and 16 of JF1. Refer to the
table on the right for pin defi nitions.
ATX Power 24-pin Connector
Pin Defi nitions (J1B4)
Pin# Defi nition
13 +3.3V
14 -12V
15 COM
16 PS_ON
17 COM
18 COM
19 COM
20 Res (NC)
21 +5V
22 +5V
23 +5V
24 COM
Secondary Power
Connector
Pin Defi nitions (JPW2)
Pins
1 through 4
5 through 8
Required Connection
NMI Button
Pin Defi nitions (JF1)
Pin#
19
20
Power LED
Pin Defi nitions (JF1)
Pin#
15
16
5-12
Pin # Defi nition
1 +3.3V
2 +3.3V
3 COM
4 +5V
5 COM
6 +5V
7 COM
8 PWR_OK
9 5VSB
10 +12V
11 +12V
12 +3.3V
Defi nition
Ground
+12V
Defi nition
Control
Ground
Defi nition
Vcc
Control