Cisco Systems 2800 manual Source a and Source B Wired with Opposite-Polarity Grounds

Page 25

Note When source A and source B are wired with common negative terminals, as in Figure 22, discharging does not occur and there is no restriction requiring that source A and source B voltages be equal.

Figure 23 Connecting Source A and Source B with Common Positive Terminals

	Va voltage = Vb voltage (greater than 0.25 V)
Va voltage = Vb voltage (within 0.25 V)
A-	A-
Va	Va
+	+
A+	A+

B+	B+
+	+
Vb	Vb
B-	B-	127040
		127040

In Figure 24, source A and source B are wired with opposite polarity grounds. Do not use this configuration.

Caution Do not use the DC input configuration shown in Figure 24.

Figure 24 Source A and Source B Wired with Opposite-Polarity Grounds

A-

Va

+

A+

B+
+
Vb
B-	127041
	127041

25

Image 25

Contents Including License and Warranty Duration of Hardware Warranty Cisco 90-Day Limited Hardware Warranty TermsReplacement, Repair, or Refund Policy for Hardware Overview To Receive a Return Materials Authorization RMA NumberSerial Number Label Location for Cisco 2801 Router Product Serial Number LocationUser Documentation Documents, Equipment, and ToolsItems Included with Cisco 2801 Routers Translated VersionsSafety Information Install ChassisItems Not Included Page OBS! Spara Dessa Anvisningar Guarde Estas Instruções GEM Disse Anvisninger Page Statement Installing the RouterAttaching Brackets to the Router for Rack-Mounting Rack-Mounting the RouterBracket Installation for Front Mounting Installing the Router in a Rack Attaching Brackets to the Router for Wall Mounting Wall-Mounting the Router-Cisco 2811 Routers OnlyGrounding the Chassis Installing the Router on a DesktopGround during normal use. Statement Chassis Ground Connection on Cisco 2801 Chassis Connect Cables Connecting the Router to AC Power Power ConnectionsProtective device is rated not greater than 120 VAC, 15 a 240 VAC, 10 A. StatementSize Wire Terminal Lug Protection Connecting the Router to DC Power60 VDC, 20 A. Statement Use copper conductors only. StatementInsulation and conductor. Statement TipStep Be connected first and disconnected last. StatementElectrical hazards. Statement DC Wire Routing and Attachment for Cisco 2811 RoutersConnecting to One Source Only-Source a or Source B Source a and Source B Wired with Opposite-Polarity Grounds WAN, LAN, and Voice Connections Connecting the Router to Backup PowerT1/E1 WAN Port or Connection Port Type, Color CableChecklist for Power-Up Power Up the RouterSystem Management Connections Port Color Connection CablePower-Up Procedure Interface Numbering Verify the Hardware ConfigurationVerify the Front Panel LED Indications LED Label LED Color or State MeaningPort Location Interface Numbering Scheme Examples1 Slot Type Interface Numbering RangePerform Initial Configuration Initial Configuration Using the Setup Command Facility Summary of the available interfaces appears User prompt appears Verify the Initial Configuration Where to Go NextTo access documentation on Cisco.com To access documentation using Cisco Connection Online CCOCisco.com Obtaining DocumentationProduct Documentation DVD Ordering DocumentationDocumentation Feedback Reporting Security Problems in Cisco ProductsCisco Product Security Overview Definitions of Service Request Severity Submitting a Service RequestObtaining Technical Assistance Cisco Technical Support & Documentation WebsiteObtaining Additional Publications and Information Page Page Page Page USA

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