What is the difference between switches of EDS-400A and EDS-500A series?

Managed switches of EDS-400A series are the basic series of switches.

EDS-500A series additionally support the following features: LACP Port Trunking, 802.1X, IEEE 1588 PTP V1, have the second relay output and two digital inputs.

Managed switches of EDS-400A series are the basic series of switches.

EDS-500A series additionally support the following features: LACP Port Trunking, 802.1X, IEEE 1588 PTP V1, have the second relay output and two digital inputs.

The differences between two series are given in the table. All other functions fully match.

EDS-400AEDS-500A
Protocols
IGMPv1/v2IGMPv1/v2
GMRPGMRP
GVRPGVRP
SNMPv1/v2c/v3SNMPv1/v2c/v3
DHCP Server/ClientDHCP Server/Client
TFTPTFTP
BootPBootP
SNTPSNTP
SMTPSMTP
RARPRARP
RMONRMON
HTTPHTTP
TelnetTelnet
SyslogSyslog
DHCP Option 66/67/82DHCP Option 66/67/82
LLDPLLDP
EtherNet/IPEtherNet/IP
Modbus/TCPModbus/TCP
NTP Server/ClientNTP Server/Client
IPv6IPv6
PROFINET
IEEE 1588 PTPv2
HTTPS
SSH
SNMP Inform
IEEE 802.3ad for Port Trunk with LACP
IEEE 802.1X for Authentication
IEEE 802.1s for Multiple Spanning Tree Protocol
Relay output
12
Digital inputs
No2