Table 2-7: Piu Leds - Nera WiLink-I Series System Manual

CAUTION
In a first generation PIU (without HOT SWAP LED), disconnect power from the PIU module before
inserting/ejecting it to/from the chassis. Before disconnecting the power cable from the PIU, the
power source must be disconnected to avoid irreversible damage due to a potential excessively
high transient current.
In a second generation PIU (with HOT SWAP LED), disconnect power from the PIU module only
after it is taken out from the chassis (or after the HOT SWAP LED is turned on). Connect power to
the PIU only after it is fully inserted into the chassis.
PWR and MASTER
LEDs
PWR MASTER
Off Off
Red Off
Red Green
Green Off
Green Green
HOT SWAP
2.2.5.1 Preparing a Power Cable
A 2.5m DC power cable is supplied with each chassis. Additional DC cables can
be ordered from the Supplier.
To prepare a power cable:
Use a cable capable of supporting a current of at least 40A. Use a cable with 2
1
x 8AWG (or thicker) wires for the power plus an additional 8AWG to 20AWG
ground wire.
The matching power connector to be used is Amphenol D-type power P/N
2
177TWA/3W3/SP3Y with high power socket contacts P/N 17DM53744-1.
WiLink-I Modular Base Station System Manual

Table 2-7: PIU LEDs

PIU Status
Chassis is not connected to power
Power is not connected or power input is out of range or PIU card is damaged. Chassis
is powered by the redundant PIU
Power input is out of range or PIU card is damaged. Chassis is powered by the PIU
Power to PIU is OK. PIU is in redundant mode and the chassis is powered from the
other PIU
Power to PIU is OK. The chassis is powered from the PIU.
Off: Power from the module to the chassis is not disconnected, the PIU is not ready for
removal
Blue: Power from the module to the chassis can be disconnected and the PIU can be
safely removed
For instructions on using the HOT SWAP handles refer to
Installing the Base Station Equipment
Section 2.2.9
.
37