Description of chassis rear side
18
Model 6276 User Guide
2 • Chassis specifications
The front of the chassis also provides two slots suitable for 3Ux8HP ForeFront power supplies, model 6160
(DC) or 6165 (AC). These devices are described more completely in the 6160/6165 Users Manual.
All 6U slots provide 4HP module spacing and are on 0.80 in. centers (except for the power supply slots, which are
offset 0.1 inch as per PICMG 2.11 standard). Card guides are molded plastic with metallic ESD contacts (see
Electrostatic Discharge (ESD) Protection on page 20) per CompactPCI PICMG 2.0 R3.0 & IEEE 1101.10.
Figure 3. Front view of chassis
Description of chassis rear side
The rear of the chassis is divided into two areas:
•
A set of four 6U slots for ForeFront transition modules (see
figure 2
on page 17). These modules typically con-
tain cable connections for I/O interfaces such as T1/E1 trunks, optical fiber trunks, DSL lines, Ethernet, etc.
•
A set of 3U slots allocated for the following uses (see
figure 4
on page 19):
-
Power input module—either Patton Model 6112 (DC) or Patton Model 6117 (AC) (see
figure 5
on
page 19). These modules provide power input to the power supplies in the front of the chassis (see
figure 2
on page 17). The input module provides input for both power supplies.
-
Model 6103 Alarm Card (optional)—provides contact closure alarm relay outputs for external alarm
monitoring,