Cisco WS-C2950-24 Hardware Installation Guide - Page 72
Power Guidelines and Requirements
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Power Guidelines and Requirements Chapter 2 Preparing for Router Installation Power Guidelines and Requirements Check the power at your site to ensure that you are receiving "clean" power (free of spikes and noise). Install a power conditioner if necessary. The AC power supply includes the following features: • Autoselects either 110 V or 220 V operation. • All units include a 6-foot (1.8-meter) electrical power cord. (A label near the power inlet indicates the correct voltage, frequency [AC-powered systems only], current draw, and power dissipation for the unit.) Table 2-1 lists power requirements for the Cisco 2900 and 3900 series routers. Table 2-1 Power Requirements for Cisco 2900 and 3900 Series Routers Router Power Source Cisco 2901 AC Cisco 2901 with PoE1 AC Cisco 2911 AC DC Cisco 2911 with PoE AC Cisco 2921 AC DC Cisco 2921 with PoE AC Cisco 2951 AC DC Cisco 2951 with PoE AC Cisco 2911, 2921, and 2951 Backup power: Cisco RPS-675 Redundant Power System Cisco 3925 AC Cisco 3925E Cisco 3925 with PoE AC Cisco 3925E with PoE Cisco 3925 DC Cisco 3925E Cisco 3945 AC Cisco 3945E Cisco 3945 with PoE AC Cisco 3945E with PoE Cisco 3945 DC Cisco 3945E 1. POE = power over Ethernet Input Power Input Voltage Tolerance Limits 100 - 240 VAC, 2.0 A, 50 - 60 Hz 90 - 264 VAC 100 - 240 VAC, 5.0 A, 50 - 60 Hz 90 - 264 VAC 100 - 240 VAC, 2.0 A, 50 - 60 Hz 90 - 264 VAC 24 - 60 VDC, 8 A, positive or negative 20 - 72 VDC 100 - 240 VAC, 4.0 A, 50 - 60 Hz 90 - 264 VAC 100 - 240 VAC, 3.0 A, 50 - 60 Hz 90 - 264 VAC 24 - 60 VDC, 12 A, positive or negative 20 - 72 VDC 100 - 240 VAC, 8.0 A, 50 - 60 Hz 90 - 264 VAC 100 - 240 VAC, 3.0 A, 50 - 60 Hz 90 - 264 VAC 24 - 60 VDC, 12 A, positive or negative 20 - 72 VDC 100 - 240 VAC, 8.0 A, 50 - 60 Hz 90 - 264 VAC 100 VAC, 10 A, or 240 VAC, 6 A 100 - 240 VAC, 7.0 A - 3.0 A, 50 - 60 Hz 100 - 240 VAC 90 - 264 VAC 90 - 264 VAC 24 - 60 VDC 18 - 75 VDC 100 - 240 VAC 90 - 264 VAC 100 - 240 VAC 90 - 264 VAC 24 - 60 VDC 18 - 75 VDC Cisco 2900 Series and 3900 Series Hardware Installation Guide 2-6 OL-18712-02