Avocent ACS804EAC-400 - Console Emerson - Free user manual and instructions
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| Type of product | Secure console server |
| Brand | Emerson (Avocent) |
| Model | Avocent ACS804EAC-400 |
| Category | Console server |
| Number of serial ports | 4 x RJ-45 serial console ports |
| Ethernet port | 1 x RJ-45 10/100/1000 Mbps |
| Management interfaces | SSH v2, Telnet, SNMP, Web GUI |
| Supported protocols | TCP/IP, UDP, HTTP, HTTPS, SNMP |
| Mounting | 1U rackmount |
| Dimensions (W x H x D) | 440 mm x 44 mm x 350 mm |
| Weight | 3.5 kg |
| Power supply | 100-240 V AC, 50/60 Hz, auto-sensing |
| Operating temperature | 0 to 50 °C |
| Storage temperature | -20 to 70 °C |
| Safety features | Integrated firewall, user authentication, and access control lists |
| Maintenance and cleaning | Wipe with a dry clean cloth; avoid liquids; keep ventilation slots unobstructed |
| Spare parts and repairability | Standardized components; for replacements contact Emerson support |
| General information | Includes AC power adapter, rackmount brackets, and quick start guide |
Frequently Asked Questions - Avocent ACS804EAC-400 Emerson
How to connect the ACS804EAC-400 to my network?
Connect the Ethernet port to your network switch using a standard RJ-45 cable, then connect the serial console ports to your devices using the appropriate rollover cables. Power on the unit and obtain an IP address via DHCP or configure a static address.
How to access a connected device via SSH?
Open an SSH client (e.g., PuTTY) and connect to the console server's IP address. Authenticate with your user credentials, then select the desired serial port from the menu. You will receive an interactive console session with the connected device.
Can I configure user accounts on this device?
Yes, the ACS804EAC-400 supports local user accounts with defined roles and permissions. You can create, modify, and delete users via the web interface or CLI, and also integrate with RADIUS or LDAP for centralized authentication.
How to reset the console server to factory defaults?
To reset, press and hold the Reset button on the rear panel for about 5 seconds until the status LED flashes. This will restore the device to factory defaults, including the default IP address and credentials.
What is the default IP address?
The default IP address is 192.168.0.10 with subnet mask 255.255.255.0. The default username is admin and password is password. It is highly recommended to change these after first login.
How to update the firmware?
Download the latest firmware from the Emerson support website, then log into the web interface and navigate to Maintenance > Firmware Upgrade. Upload the file and confirm; the device will reboot automatically after the upgrade.
How to troubleshoot connection issues?
First verify physical connections and power status. Check the network settings and ping the device. Confirm that the serial ports are configured with the correct baud rate and protocol (e.g., SSH, Telnet). Review the system log in the web interface for error messages.
Is it possible to use a modem for out-of-band access?
Yes, the ACS804EAC-400 supports optional dial-up access. You can connect a modem to the auxiliary port (if available) and configure the device to accept incoming PPP connections. This allows remote management when the network is down.
How to secure the console server?
Enable SSH instead of Telnet, create strong user passwords, configure ACLs to restrict source IPs, and use HTTPS for web access. Also consider integrating with RADIUS/LDAP for centralized policy enforcement.
What are the power requirements?
The power supply accepts 100-240 V AC at 50/60 Hz automatically. The typical consumption is 12 W. Use the included AC power adapter to connect to a grounded outlet.
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USER MANUAL Avocent ACS804EAC-400 Emerson
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Product information
Brand : Emerson
Model : Avocent ACS804EAC-400
Category : Console