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Catalyst 3550 Multilayer Switch Hardware Installation Guide
OL-6155-01
Appendix A Technical Specifications
Table A-2 Power Requirements for the Catalyst 3550-12T, 3550-12G, 3550-24, 3550-24-FX, and
3550-48 Switches
Power Requirements
AC input voltage Catalyst 3550-12T and 3550-12G:
100 to 127/200 to 240 VAC (autoranging)
2 A/1 A, 50 to 60 Hz
Catalyst 3550-24, 3550-24-FX, and 3550-48:
100 to 127/200 to 240 VAC (autoranging)
1.6 A/0.9 A, 50 to 60 Hz
DC input voltages for
RPS 300
Catalyst 3550-12T and 3550-12G: +12 V @13 A
Catalyst 3550-24: +12 V @8.5 A
Catalyst 3550-24-FX: +12 V @8.5 A
Catalyst 3550-48: +12 V @13 A
Power Requirements
DC input voltages for
RPS 675
+12 V @25 A
Power consumption Catalyst 3550-12T and 3550-12G: 190 W, 650 Btus per hour
Catalyst 3550-24: 65 W, 222 Btus per hour
Catalyst 3550-24-FX: 85 W, 290 Btus per hour
Catalyst 3550-48: 110 W, 375 Btus per hour
Table A-3 Power Requirements for the Catalyst 3550-24PWR Switch
Power Requirements
AC input voltage 100 to 127 / 200 to 240 VAC (autoranging)
5.5 A / 2.8 A,
50 to 60 Hz
DC input voltages for RPS 300 +12 V@7.5 A, –48 V@7.8 A
DC input voltages for RPS 675 +12 V @25 A, –48 V@7.8 A
Power consumption 525 W, 1790 Btus per hour
Table A-4 Power Requirements for the Catalyst 3550-24-DC
Power Requirements
Power consumption 55 W, 190 Btus per hour
DC input voltage –36 to –72 VDC
DC input voltages for RPS 675 +12 V @13 A
Wire gauge for power connection 18 AWG (6 AWG for protective earth)
Branch circuit protection 5 A