Planning the Site and Installation
3-4
SmartEdge 1200 Router Hardware Guide
Table 3-4 lists the operating and inrush current (in amperes) at –48 VDC for SmartEdge 1200 chassis
components. Inrush current occurs during power on or during the installation of a component in a
powered-on chassis. Unless noted, maximum duration is 4 ms.
Electrical Power Connections
The SmartEdge 1200 router power architecture has connectors for two power zones, each with primary and
backup sources. Zone 1 powers slots 1 to 7; zone 2 powers slots 8 to 14. Both zones provide power to the
fan tray. Both zones 1 and 2 must be connected for the chassis to be operational.
Primary sources are designated as A sources; backup sources are B sources. A1 refers to the primary power
source for zone 1; B1 refers to the backup power source for zone 1. For a fully redundant power
configuration, all four sources must be connected. Table 3-5 lists all possible power configurations
Table 3-6 lists the possible power conditions that result in a nonoperable SmartEdge 1200 chassis. These
conditions can occur for either or both of the following causes:
• The original power configuration was not fully redundant.
• Both the primary and the backup power source for a zone has failed.
Table 3-4
Operating and Inrush Current for Chassis Components at –48 VDC
Component
Operating Current
Inrush Current
Controllers
XCRP (active or standby)
XCRP3 (active or standby)
XCRP4 (active or standby)
1.00
0.86
2.21
4.60
3.00
0.52
1
1. Maximum duration is 25 ms.
Chassis
Fan tray (nominal speed)
Fan tray (high speed)
2.20
5.40
6.60
2
2. Maximum duration is 3 ms.
Table 3-5
Slot and Power Zone Configuration Options
Slot Power Configuration
Power Zone Configuration
Power Connection Options
All slots have redundant power.
Redundant power for zones 1 and 2
A1, B1, A2, B2
All slots have nonredundant power.
Nonredundant power for zones 1 and 2
A1, A2 or
B1, B2 or
A1, B2 or
B1, A2
Slots 1 to 7 have nonredundant power.
Slots 8 to 14 have redundant power.
Power to both zones
Redundant power for zone 2 only
A1, A2, B2 or
B1, A2, B2
Slots 1 to 7 have redundant power.
Slots 8 to 14 have nonredundant power.
Power to both zones
Redundant power for zone 1 only
A1, B1, A2 or
A1, B1, B2
