Cisco 2610 Hardware Installation Guide - Page 62

Connecting Routers to a DC-Input Power Supply, DC Wiring Requirements

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Power Connections Chapter 3 Installing the Router Warning AC connected units must have a permanent ground connection in addition to the power cable ground wire. NEBS-compliant grounding satisfies this requirement. Statement 284 Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 15A, 120VAC (10A, 240VAC). Statement 1005 Connecting Routers to a DC-Input Power Supply If your router has a DC-input power supply, follow the directions in this section for proper wiring. Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 15A, 60VDC. Statement 1005 Warning Use copper conductors only. Statement 1025 DC Wiring Requirements Table 3-1 summarizes the wiring requirements for Cisco 2600 series routers with a DC-input power supply. Note For installations compliant with the National Electric Code, AWG 14 (2.0 mm2) wire is required for DC input and safety ground wire. Table 3-1 DC Wiring Requirements for Cisco 2600 Series Routers Router DC Input Cisco 2600 with -48 to -60 VDC, 4 A2 1-RU chassis height DC Input Wire Size1 AWG 18 (1.0 mm2) Safety Ground Wire Size Overcurrent Protection AWG 14 (2.0 mm2) 15 A maximum Cisco 2691 24 - 36 V, 8 A, positive or negative, single or dual sources3 AWG 18 (1.0 mm2) AWG 14 (2.0 mm2) 15 A maximum 36 - 60 V, 4 A, positive or negative, single or dual sources AWG 18 (1.0 mm2) AWG 14 (2.0 mm2)) 15 A maximum 1. See the note above this table for National Electric Code wire size requirements. 2. The input voltage tolerance limits for nominal 48-V power supplies are 38 and 72 VDC. 3. The input voltage tolerance limits for nominal 24/48-V power supplies are 18 and 72 VDC. 3-16 Cisco 2600 Series Routers Hardware Installation Guide OL-2171-06

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3-16
Cisco 2600 Series Routers Hardware Installation Guide
OL-2171-06
Chapter 3
Installing the Router
Power Connections
Warning
AC connected units must have a permanent ground connection in addition to the power cable ground
wire. NEBS-compliant grounding satisfies this requirement.
Statement 284
Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than:
15A, 120VAC (10A, 240VAC).
Statement 1005
Connecting Routers to a DC-Input Power Supply
If your router has a DC-input power supply, follow the directions in this section for proper wiring.
Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than:
15A, 60VDC.
Statement 1005
Warning
Use copper conductors only.
Statement 1025
DC Wiring Requirements
Table 3-1
summarizes the wiring requirements for Cisco 2600 series routers with a DC-input power
supply.
Note
For installations compliant with the National Electric Code, AWG 14 (2.0 mm
2
) wire is required for DC
input and safety ground wire.
Table 3-1
DC Wiring Requirements for Cisco 2600 Series Routers
Router
DC Input
DC Input Wire Size
1
1.
See the note above this table for National Electric Code wire size requirements.
Safety Ground Wire Size
Overcurrent Protection
Cisco 2600 with
1-RU chassis height
–48 to –60 VDC, 4 A
2
2.
The input voltage tolerance limits for nominal 48-V power supplies are 38 and 72 VDC.
AWG 18 (1.0 mm
2
)
AWG 14 (2.0 mm
2
)
15 A maximum
Cisco 2691
24 - 36 V, 8 A,
positive or negative,
single or dual sources
3
3.
The input voltage tolerance limits for nominal 24/48-V power supplies are 18 and 72 VDC.
AWG 18
(1.0 mm
2
)
AWG 14
(2.0 mm
2
)
15 A maximum
36 - 60 V, 4 A,
positive or negative,
single or dual sources
AWG 18
(1.0 mm
2
)
AWG 14
(2.0 mm
2
))
15 A maximum