DTS 305


DIN rail Mount / Submeter & Transducer

  • ETL Listed, CE, BTL Listed, SunSpec certified
  • 208V – 480V ac, L-L (1P 2W, 1P 3W, 3P 4W)
  • 690V ac, L-L, 3 or 4 W (option)
  • Ethernet or RS-485 connectivity
  • Modbus TCP, and BACnet/IP protocols loaded as default, SNMP or DNP 3.0 
  • Modbus RTU and BACnet MS/TP protocols loaded as default, LonWorks
  • 333mV or 5A CT inputs
  • 333mV models can be field selectable for 333mV or Rogowski CTs (NO integrator required)
  • Bi-directional for renewable systems (NET metering)
  • Front Panel mounting DTS Display Option (1.2 Mb) [PDF]
  • Options:
    • up to 6 x isolated, bi-directional analog outputs
    • up to 10 x solid state relay outputs
    • up to 4 x potential free digital Inputs,
    • 12Vdc, 24Vdc or 48Vdc DC Auxiliary power supply
  • The specifications above are model dependent.

Data Sheets & Downloads


DTS 305 Datasheet (1.9 Mb) [PDF]
Inline Fuse Kit Sheet (1 Mb) [PDF]
DTS Display Datasheet (1.2 Mb) [PDF]
DTS Display Sheet (Legacy) (1.2 Mb) [PDF]
MLG-WCT 333mV split core CT datasheet (1.3 Mb) [PDF]
MLG-WRT Rogowski CT datasheet (230 Kb) [PDF]
MLG-RCT Rogowski CT datasheet (385.5 Kb) [PDF]


DTS 305 — Installation Guide (2.3 Mb) [PDF]
Configuring AC and DC Current Sensors (308.7 Kb) [PDF]
DTS RS-485 Meter Setup using DTS Config & CCOM-0017 (1.7 Mb) [PDF]
RS-485 Cabling Requirements for Modbus RTU and BACnet MSTP (161.3 Kb) [PDF]
Guide for Extending CT Cable Length (118.6 Kb) [PDF]
Using Multiple CT Sets with DTS Meters (681.6 Kb) [PDF]
Configuring Digital IO using DTS Config (621.5 Kb) [PDF]


Download DTS Config (Modbus ONLY) (2 Mb) [ZIP]
Download DTS Toolbox (9.2 Mb) [ZIP]
Changing IP settings for an Ethernet based DTS meter (1.4 Mb) [PDF]
BACnet Explorers – 3rd party tools

View Software / Drivers page for more details & current version info.

DTS Modbus Map (732.5 Kb) [PDF]
DTS Modbus Addendum (SunSpec) (353.9 Kb) [PDF]
DTS BACnet MS/TP Map (539.8 Kb) [PDF]
DTS BACnet/IP Map (182.2 Kb) [PDF]
DTS LonWorks Map (274.7 Kb) [PDF]
DTS SNMP Map (146.1 Kb) [PDF]
— DTS AC Meters MIB File (2 Kb) [ZIP]
— DTS DC Meters MIB File (986 B) [ZIP]
DTS DNP 3.0 Map (157.1 Kb) [PDF]

DTS Logging System (308 Kb) [PDF]

Product Description

The DTS 305 digital 3 phase power meter and power transducer provides you with unprecedented functionality, flexibility and performance in electrical measurement and control. This powerful meter is an extremely compact, easy to configure, simple to install IED (Intelligent Electronic Device). With the DTS 305, you only pay for the power meter usage hardware, software and functionality which you require, making this one of the most cost-effective products of its kind available on the market today.

This meter provides the full spectrum of instantaneous and integrated electrical power measurements as well as flexible I/O options. These I/O options offer up to 6 onboard outputs, each of which may be independently ordered as either digital or analog as well as 4 digital I/O relay outputs or status inputs.

The DTS 305 is a 3 phase power monitoring device which may be used for 3 or 4 wire systems. This makes the DTS 305 ideal for a wide range of applications from monitoring of power networks, load management to check metering. All of the DTS 305’s measurements are available via its on-board Ethernet port. These may be viewed using the DTS Display local indication module or the DTS Config software system. The DTS 305 may be operated in stand-alone mode or integrated into a higher order energy management or SCADA system using its second RS-485 port running either Modbus or DNP 3.00 communication protocols.


  • Auxiliary powered single / three phase energy submeter with auto-topology detection
  • Bi-directional for renewable systems (NET metering)
  • Interfaces with 1A, 5A and “safe” mV and flexible Rogowski CTs
  • Embedded Ethernet connectivity – Modbus/TCP, BACnet/IP, SNMP or DNP 3.0
  • RS-485 connectivity – Modbus RTU or BACnet MS/TP
  • LonWorks FT-10 communications
  • 6 onboard outputs (digital or isolated, bi-directional analog) – optional
  • 4 digital I/O (pulse outputs or status/counter inputs) – optional
  • Optional remote DTS Display
  • Pulse output standard
  • Color coded pluggable connectivity
  • DIN rail or surface mounting
  • User configurable using DTS Config software
  • User-definable Modbus register area
  • Compatible with energy management and control software suites
  • Integrates seamlessly with AcquiSuite data acquisition server
  • ETL & BTL listed
  • SunSpec Alliance certified
  • Designed and Manufactured in the USA. Complies with the Buy American Provisions of ARRA Section 1605

** CTs excluded



Measuring Circuits

Voltage range: 208-480V ac, L-L, 3 or 4 w (690V option)
Rated voltage: 280 V ac L-N / 485 V ac L-L
Voltage overload: 1.2 x (1.05 x – 690V option)
Voltage burden: <0.1 VA @ 280 V ac L-N
Frequency: 45 to 65 Hz
Rated current: 1A to 5A isolated 333 mV for mV CT version
Current overload: 1.5 x for 1A or 5A versions 1.2 x for mV versions
Current input burden: 0.5 VA @ 5 A
Power overload: 1.2 x


Voltage: 0.5%, <0.2% typical (80-120%)
Current: 0.5%, <0.2% typical (10-120%)
Power: 0.5%, <0.2% typical (10-120%)
Power Factor: 0.5% (between 0.5 and 1.0)
Energy:** Class 0.5 (ANSI C12.20)

Power Supply

Voltage: 100-277 Vac/dc, 12 or 24 or 48 Vdc
Tolerance : -10%, +10%, Frequency: 50/60 Hz for AC supply models only
Burden: 5VA
Operating temp: -4º to 131ºF (-20º to 55ºC)
Storage temp: -40º to 185ºF (-40º to 85ºC)
Humidity: 5 to 95% R.H. non-condensing


Connection: Pluggable terminals
Case Material: Self-extinguishable, V0 plastic
Protection: IP40
Dimensions: 4”(102mm)H x 5.00”(127mm)D x 3.94”(100mm)W
Weight: 1.25 lbs (0.57 kg)

Communications (Serial)

Connection: 3 way pluggable, screw terminal
Protocols: Modbus RTU or BACnet MS/TP

Communications (LonWorks)

Connection: 2 way pluggable, screw terminal
Protocols: LonWorks FT-10

Communications (Ethernet)

Connection: RJ45, 10/100Base-T
Protocols: Modbus TCP and BACNet/IP or SNMP or DNP 3.0 over IP

Analog Output (Isolated, Bi-directional)

Output Type: 1mA or 7.5 / 10 / 20mA available
5 / 10Vdc
Resolution: 16384 points (14 bit)
Max impedance: 500 ohms for a 20mA range

Pulse / Status Outputs (Optional)

Type: Potential Free, N.O. Solid State Relay
Pulse Width: 100 mS default
Min 50 mS, User configurable up to 10 Seconds
Max 10 Pulses per Second
Pulse Rate: 1 Pulse / 1 kWh default, User configurable
Max On-Resistance: 30 ohm
Max Switching Voltage: 240Vac
Max Switching Current: 120mA (350mA for 10mS)
Connection: 4 x Pin-Pairs (Outputs A – D)

Counter / Status Inputs (Optional)

Type: Dry Contact
Min Pulse Width: 50mS, Max 10 Pulses per Second
Max Current/Voltage: 15mA / 18V
Connection: 4x Pin-Pairs (Inputs A – D)

Standards & Safety

ETL listing: 4001073
Conforms to: UL Std 61010.1
Certified to: CSA Std C22.2 # 61010.1
EMC: IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11
FCC: CISPR 11 class A
Other: IEC60688 (self tested)
Category III – 280Vac / 485Vac

Add-On Products