Specifications

Revised: January 4, 2012

This appendix provides cable and power supply technical specifications for the Catalyst 4900M switches.

Console Port

The console port is an RJ-45 receptacle. The Request to Send (RTS) signal tracks the state of the Clear to Send (CTS) input. Table 1-1 lists the console port pinouts.

 

Table 1-1 Console Port Pinouts
Pin
Signal
Direction
Description

1

RTS

output

request to send

2

DTR

output

data terminal ready

3

TXD

output

transmit data

4

GND

—

—

5

GND

—

—

6

RXD

input

receive data

7

DSR

input

data set ready

8

CTS

input

clear to send

Note A console cable is not provided in the accessory kit. It can be ordered as an option.

10/100/1000BASE-T Management Port

The 10/100/1000BASE-T management port is an RJ-45 receptacle with a Link Status LED. Table 1-2 lists the 10/100/1000BASE-T port pinouts.

 

Table 1-2 10/100BASE-T Port Pinouts
Pin
Signal
Direction
Description

1

RXDP

input

receive data

2

RXDN

input

receive data

3

TXDP

output

transmit data

4

unused

—

—

5

unused

—

—

6

TXDN

output

transmit data

7

unused

—

—

8

unused

—

—

Catalyst 4900M Switch Power Supply Specifications

The Catalyst 4900M switch 1000 W AC-input power supply (PWR-C49M-1000AC) is shown in Figure 1-1 with the major features identified. The 1000 W DC-input power supply (PWR-C49M-1000DC) is shown in Figure 1-2 with the major features identified. Table 1-3 list the power supply specifications.

Figure 1-1 1000 W AC-Input Power Supply (PWR-C49M-1000AC)

 

 

1

Captive installation screw
4

AC-in connector

2

Handle
5

INPUT OK LED

3

Power on/off switch
6

OUTPUT OK LED

Figure 1-2 1000 W DC-Input Power Supply (PWR-C49M-1000DC)

 

 

1

Captive installation screws
5

DC-in connector (positive (+) post)
2

Handles
6

DC-in connector (negative (–) post)
3

Power on/off switch
7

INPUT OK LED
4

Ground post
8

OUTPUT OK LED

Note DC power cable lugs are not supplied as part of the accessory kit; they must be purchased separately. Suitable DC power cable lugs include:

  • For 4 AWG-sized cable—Panduit LCD4-14AF-L or Burndy YA4C-2L-90
  • For 6 AWG-sized cable—Panduit LCD6-14AF-L

See Figure 1-3 for the dimensions of a suitably-sized lug.

 

Figure 1-3 DC Power Cable Lug Dimensions

 

Table 1-3 lists the AC-input and the DC-input power supply specifications.

 

Table 1-3 Catalyst 4900 Series Power Supply Specifications

Item
Specification
AC-input power supply

Power supply output

960 W

Power supply dissipation

240 W

AC-input

12 A maximum @ 100 VAC
5 A maximum @ 240 VAC

AC frequency

50 to 60 Hz

Output current

80 A maximum

Inrush value

Cold turn on (PSU on for < 1 hour) 50 A for one cycle of AC

Output voltage

12 VDC

Input KVA rating

1.200 KVA
DC-input power supply

Power supply output

960 W

Power supply dissipation

320 W

DC-input

27 A @ –48 VDC (Operating range –40.5 to –56 VDC)

21.6 A @ –60 VDC (Operating range –55 to –72 VDC)

Output current

80 A maximum

Inrush value

Hot turn on (PSU on for > 1 hour) 75 A

Output voltage

12 VDC

Input KVA rating

1.296 KVA