5-4
October, 1998
GRF 400/1600 Getting Started - 1.4 Update 2
Cabling and Verifying Media Cards
Inserting a media card into the GRF
Inserting a media card into the GRF
ESD requirements
!
Caution:
Media cards are hot swappable and can be installed when the GRF is running.
However, media cards are highly susceptible to damage from electrostatic discharge. You must
wear a grounded, conductive wrist strap any time you handle a media card. Make sure the
metallic elements in the band directly touch your exposed skin.
Minimum load requirement
To operate properly, the GRF 1600 requires that at least two media cards be installed. Also, a
face plate cover must be installed in any unused slot to maintain cooling flows.
On-card connectors
Media cards are actually two logic boards joined to make a single component. As shown in
Figure 5-1, the smaller board on the right is the serial interface, also called the serial daughter
card. The larger one on the left is the media board and has the network ports. Together they
comprise a GRF media card.
Figure 5-1. Media card components
The two logic boards are joined by a pair of 100-pin connectors and reinforcing plates. Even
so, this joint retains some flex and must be carefully supported, especially when inserting the
media card into the chassis.
Warning:
The backplane of the GRF contains hazardous energy levels. When replacing a
media card, remove only one card at a time. Removing more than one card will expose the
operator to this energy hazard.
Wrist strap connector sites
GRF 1600
GRF 400
Media board
Port
Serial
daughter
card
Serial/rev
number area
Top
Bottom
Cards install horizontally level for 4-card GRF 400:
Cards install vertically for 16-card GRF 1600:
