Overview#
The DSE 7420 MkII is a networked auto mains failure (AMF) generator controller — the "connected" evolution of the DSE 7320. While the 7320 is the industry workhorse for standalone standby, the 7420 adds native Ethernet with embedded web server, Modbus TCP, and SNMP v2c — making it the standard for generators that need to integrate directly with building management systems over IP networks.
In data centers, hospitals, and modern commercial buildings where everything connects to the BMS, the 7420 eliminates the need for external protocol gateways or add-on communication modules.
7420 vs 7320: when to choose which#
| Feature | DSE 7320 | DSE 7420 MkII |
|---|---|---|
| Serial (RS232/RS485) | ✅ | ✅ |
| USB | ✅ | ✅ |
| Ethernet | ❌ | ✅ |
| Modbus TCP | ❌ | ✅ |
| SNMP v2c | ❌ | ✅ |
| Embedded web server | ❌ | ✅ |
| Price | Lower | Higher |
| Use case | Simple standby | BMS-integrated standby |
Choose 7320 when: standalone operation, no network integration needed, cost-sensitive. Choose 7420 when: BMS integration required, IT monitoring tools (SNMP), remote web-based diagnostics.
BMS integration scenarios#
The 7420's native protocols cover every common BMS integration:
- Modbus TCP → Niagara/Tridium, Schneider EcoStruxure, Honeywell Niagara
- SNMP → Nagios, PRTG, SolarWinds, Zabbix (data center IT tools)
- Web server → Direct browser access for facility managers
- DSEWebNet → Cloud monitoring with SMS/email alerts (via DSE890 gateway)
Our service experience#
The 7420 MkII is our standard recommendation for new commercial standby installations where the facility has a BMS. The embedded web server is invaluable for remote diagnostics — we can check controller status, read fault codes, and verify exercise history from our office before dispatching a technician. This reduces unnecessary site visits and speeds up troubleshooting. Configuration is done via DSE Configuration Suite (same software as the 7320 — no separate training needed).