Appendix A: Connectors and LEDs
5
6
Key
3
4
Part
LED
Table 55: 7750 SR-a AC PSU Description (Continued)
Description
Unlit : The AC power input is below the specified minimum to turn on the
PSU.
Green (slow blink) : The PSU is in standby mode. Standby output is operating within normal parameters. The main output is disabled.
Green (solid) : The standby and main outputs are operating within normal parameters and delivering power.
Yellow (slow blink) : A warning condition has been detected on the PSU.
Yellow (solid) : A fault condition has been detected on the PSU.
Red (solid) : An incorrect PSU has been inserted in the shelf.
AC power/ground connector retainer
Secures the AC power cable in place.
AC inlet (IEC 60320-C14) Connector for AC power cable
Latch lock Secures the PSU in place. Press the latch lock to the left to unlock the
PSU.
Refer to Installing, Wiring, and Connecting an AC PSU on page 94 for requirements and
information regarding AC power cables and AC power converters.
7750 SR-a –48 VDC PSU LED and Connectors
Figure 45
shows the SR-a –48 VDC PSU. Table 56
describes the connectors and LEDs.
Figure 45: 7750 SR-a –48 VDC PSU
3
Pwr
S tat
6
7
1 2
+
4
_
5
24567
7750 SR-a4 and SR-a8 Installation Guide 139
