DTS 307


DIN rail Mount / Line Powered

  • Ultra-Compact DIN rail design: 3.11” L x 1.38” W x 4.25” H
  • ANSI C12.20 – Revenue Grade
  • UL Listed, CE, FCC Part 15 Class B
  • BTL Listed, SunSpec Alliance certified
  • RS-485 and/or Pulse (kWh) connectivity
  • Modbus RTU and BACnet MS/TP protocols loaded as default, (field selectable)
  • 208 – 600Vac L-L 3 or 4 Wire
  • 333mV models can be field selectable for 333mV or Rogowski CTs (NO integrator required)
  • 1 x digital output (kWh Energy pulse output)
  • Self powered OR 24 Vac / 12-24Vdc auxiliary power supply
  • Bi-directional for renewable systems (NET metering)
  • Also available in a OEM board level format
  • Right angle DIN rail bracket mounting option
  • Made in USA

The selection fields below are in the same order as the “Model Number Builder” on page 2 of the DTS 307 datasheet (1.6 Mb) [PDF]

DTS 307 – ab – cd – e – f

Data Sheets & Downloads


DTS 307 Datasheet (1.6 Mb) [PDF]
MLG-WCT 333mV split core CT datasheet (1.3 Mb) [PDF]
MLG-WRT Rogowski CT datasheet (230 Kb) [PDF]
MLG-RCT- Flexible Rogowski CT datasheet (385.5 Kb) [PDF]
Right Angle DIN Rail Bracket Datasheet (1.4 Mb) [PDF]
Inline Fuse Kit Sheet (1 Mb) [PDF]


DTS 307 — Installation Guide (901.7 Kb) [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]
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 DNP 3.0 Map (157.1 Kb) [PDF]

DTS Logging System (308 Kb) [PDF]

Product Description

Designed as an OEM solution, the DTS 307 is unique in that it has one of the smallest foot-prints of any submeter on the market, with dimensions of 3.11”(79mm) D x 4.25”(108mm) H x 1.38”(35mm) W.  Along with a ultra-compact DIN rail design, the DTS 307 requires no external power source to operate and comes with color coded, pluggable connectivity. This meter can function in either a single, split or three phase environment and is equipped with auto-topology detection. It is certified to ANSI C12.20 Class 0.2 (Revenue Grade) providing the most accurate data acquisition available.

The DTS 307 works with all “safe” 333mV current transformers and comes with on-board CT Reverse Algorithms for automatic correction of in-proper field mounted CTs. For remote configurability, all our DTS Series of meters are offered with our free DTS Config software platform; where you can conveniently choose from over 200 parameters at the frequency you require. The DTS Series of meters come with a User-definable Modbus register area. The DTS 307 supports these protocols, Modbus RTU and BACnet MS/TP; additionally, there is a Pulse (kWh) version.

Also, if in the future, you decide to integrate renewable energy sources, the DTS 307 will conveniently operate as a Bi-directional NET meter. The DTS 307 is SunSpec Alliance certified and easily integrates with Building Automation Systems and Energy Monitoring Software. All the DTS Series is designed and manufactured in the USA and complies with the Buy American Provisions of ARRA Section 1605.


  • Line powered single / three phase energy sub-meter
  • Auto-topology detection
  • Ultra-Compact DIN rail design : 3.11” L x 1.38” W x 4.25” H
  • UL Listed, CE, FCC Part 15 Class B
  • ANSI C12.20 – “Revenue grade”
  • BTL Listed, SunSpec Alliance certified
  • 208-480 Vac (1P 2W, 1P 3W, 3P 4W)
  • RS-485 connectivity – Modbus RTU or BACnet MS/TP (field selectable)
  • Interfaces with 333mV or Rogowski CTs (field selectable)
  • Bi-directional for renewable systems (NET metering)
  • Color coded, pluggable connectivity
  • User configurable using DTS Config software
  • User-definable Modbus register area
  • Optional Low Voltage AC/DC Auxiliary (12-24Vdc or 24Vac)
  • Optional single Pulse Output (kWh)
  • Designed and Manufactured in the USA.
  • Complies with the Buy American Provisions of ARRA Section 1605
  • Also available in a OEM board level format


Measuring Circuits

Voltage range: 208-480Vac, L-L (CAT III)
120-277Vac L-N (CAT III)
Voltage overload: 1.1 x
Voltage burden: <0.1 VA @ 277 Vac L-N
Frequency: 45 to 65 Hz
Rated current: 333mV or model dependent
Current overload: 1.2 x
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 0.2 (ANSI C12.20)

Voltage Supply (Self Powered)

Voltage: Powered from Phase A & B or Phase A & Neutral (model dependent)
Frequency: 50/60 Hz
Burden: <2VA

Low Voltage Auxiliary (Option)

Voltage options: 12-24Vdc or 24Vac
Tolerance: +/- 10%
Burden: <2VA
Isolation: Must be powered from a Class 2 IEC 60950 isolated power supply

Mechanical Connection

Pluggable screw terminals suitable for 12AWG stranded wire (2.5mm2)
Case Material: Self-extinguishable, V0 plastic
Protection: Nema 1 (IP40)
Dimensions: 3.11”(79mm) H x 3.11”(79mm) D x 1.38”(35mm) W
Weight: 0.5lb (0.23 kg)


Operating temp: -4º to 158ºF (-20º to 70ºC)
Storage temp: -40º to 185ºF (-40º to 85ºC)
Humidity: 5 to 95% R.H. non-condensing

Communications (Serial)

Connection: 3 way pluggable, screw terminal
Protocols: Modbus RTU (SunSpec Certified) or BACnet MS/TP (BACnet Listed)

Pulse Output (Option)

Type: Potential Free, N.O. Solid State Relay
Pulse Width: Max 10 Pulses per Second
Pulse Rate: 1 Pulse / 1 KWh default, user configurable
Max On-Resistance: 30 ohm
Max switching voltage: 50Vdc or 30Vac
Max switching current: 120mA (350mA for 10mS)
Connection: Isolated Pin-Pair

Standards & Safety

UL listing: E488290
Conforms to: UL Std 61010.1 3rd Edition, May 11, 2012,
Revised July 15, 2015
Certified to: CAN/CSA C22.2 # 61010.1, 3rd Edition,
Revised July 15, 2015
Additional Standards: IEC 61010-2-030: 2010, 1st Edition
EMC: IEC 61326-1 (2012) Ed2.
IEC 61000-3-2, IEC 61000-3-3, 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
Emissions: CISPR 11 Group1 Class B / FCC Part 15 Class B
Other: Measurement Category III – 300Vac L-N / 520Vac L-L
Communications: BTL Listed, SunSpec Alliance certified
RoHS: compliant

Add-On Products