Deep Sea Electronics DSE8620 MKII

Compatibility

Documented Modbus RTU and TCP interfaces

The exact-model datasheet documents simultaneous RS-485 and Ethernet communications plus Modbus RTU and TCP support with configurable Modbus pages. Edge requires a commissioned read-only client configuration; no ready-made map is asserted.

DSE8620 MKII model 8620-02 under the cited product page and datasheet 055-255 issue 1. The installed application may instead use the DSE8610 MKII personality. Confirm firmware, controller personality, communications settings and exported Modbus pages before defining points. Do not write start, stop, breaker, governor, AVR, protection or load-share values from this monitoring path.

Connect it with

• 
  Modbus Interface ZMB-3X
  From €399 ex VAT Configure Modbus Interface
• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway
• Evaluation Gateway on a Raspberry Pi Edge with one device licensed
  Free Set up Evaluation Gateway on a Raspberry Pi

Models

Specifications

DSE calls the Modbus pages configurable. The site configuration is therefore part of the data contract and must be retained with the Edge point list.^1, 2

Exact product

DSE8620 MKII, variant 8620-02¹

Monitoring protocols

Modbus RTU and Modbus TCP with configurable Modbus pages²

Communications

RS-232, two RS-485 ports, Ethernet and CAN; ports can operate simultaneously^1, 2

Electrical measurements

Generator and mains voltage, current, frequency, kW, kVAr, kVA and power factor²

Supply

5 to 35 V DC continuous; survives a 100 ms drop to 0 V under the stated recovery condition²

Environment

-30 to +70 °C standard display; IP65 at the front when panel-mounted with the supplied gasket²

Interface

Documented measurements and integration boundaries for DSE8620 MKII.

• Generator and mains voltage, current, frequency, kW, kVAr, kVA and power factor where the commissioned Modbus page exports them.
• Engine speed, run hours, battery voltage, fuel level and configured analogue sensor values where exported.
• Alarm, warning, shutdown and controller mode states, preserving the page definition and status encoding.
• Event and trend data remain controller features; their presence does not establish a generic Modbus history interface.
• Breaker, start, governor, AVR, protection and load-share values are control functions and stay outside this monitoring guide.

Setup

1. Confirm the nameplate is DSE8620 MKII 8620-02.

   Record firmware, the active 8620 or 8610 personality, and the DSE Configuration Suite file used by the generator engineer.

2. Request the DSEGencomm/Modbus register table from support@deepseaelectronics.com with the controller serial number, model and active personality.

   The operator manual explicitly offers the table on request. Save that table and any configured page export with the site point list; there is no need to postpone wiring and endpoint checks while obtaining it.

3. For TCP, use the existing protected controls network and account for the five-client limit.

   For RTU, read the Serial Port screen: published factory defaults are 115200 baud and server address 10, but use the displayed site settings. The manual recommends a client inactivity timeout at least twice the scan interval. Keep one RTU client on the segment.

4. Start with the documented alarm-status read.

   For a first status read, issue 3 page 107 shows register 0x0306 (decimal 774), quantity 1: warning present = (raw >> 11) & 1, electrical trip present = (raw >> 10) & 1. Synthetic raw 0x0800 sets warning only; 0x0400 sets electrical trip only. These are bit masks, not voltages or a command. Compare the result with displayed alarms without creating a plant fault. The RS485 diagnostics show link quality, received-message rate and discarded-message rate for troubleshooting.

5. Keep all writes disabled.

   Treat a successful Modbus response as communications evidence only; it does not prove that the generator or breaker responded physically.

Common questions

Does every DSE8620 MKII use the same register map?

DSE describes configurable Modbus pages, but its operator manual also supplies read examples and offers the full DSEGencomm register table through technical support. Request it with the controller serial number, retain the site page export, and use the documented alarm-bit example as a starting check rather than assuming every installation is undocumented.^2, 3

Can this guide be used to start or parallel a generator?

No. The controller has operational control functions, but this guide covers read-only monitoring and publishes no control addresses or acceptance procedure.^1, 2

Why record whether it is configured as an 8610 MKII?

The same hardware can be configured for a different load-share application. That changes the plant role and can change which observations are meaningful.^1, 2