DENT Instruments PowerScout 3037

Compatibility

Compatible with EpiSensor Edge over Modbus RTU or Modbus TCP

The PowerScout 3037 is compatible with EpiSensor Edge over Modbus RTU on its RS-485 port when the meter is set to Modbus mode, read through a ZMB-31 Modbus Interface or a Gateway serial port, and over Modbus TCP on the PS3037-E Ethernet port. DENT publishes the Modbus register list with offsets, the data scalar table, word order and the supported commands in the Operator's Guide.

PowerScout 3037 serial (PS3037-S) and Ethernet (PS3037-E) meters in Modbus mode, using the register list in the Operator's Guide of 9 November 2017. Site check: read the data scalar at register 44602, then compare System Total True Energy at 44001 and 44002 with ViewPoint or the optional display. Read-only monitoring: no writes to the configuration, clear or Veris emulation registers.

Connect it with

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

Models

Specifications

The PowerScout 3037 is a revenue-grade single-point submeter with three current channels and four voltage connections, sized to mount inside an electrical panel on mounting tabs or TS35/7 DIN rail. Positive and negative registers support bi-directional metering, PhaseChek LEDs confirm CT placement and orientation, and a single open-collector output can send kWh, kVARh or kVAh pulses. The protocol, CT type and scaling are set over USB with ViewPoint.^1, 2

Models

PS3037-S-N serial only, no display; PS3037-S-D serial only, with display; PS3037-E-N Ethernet and serial, no display; PS3037-E-D Ethernet and serial, with display.²

Voltage inputs

80 to 346 V AC L-N, 600 V L-L, CAT III; single-phase, three-phase four-wire wye and three-phase three-wire delta; 50/60 Hz.^1, 2

Current inputs

3 channels, 0.525 V AC maximum, for 333 mV CTs; 158% of the CT rating to maintain accuracy; up to 4000 A with RōCoil CTs.²

Accuracy

0.2%, ANSI C12.20-2010 Class 0.2, NIST traceable calibration; resolution depends on the scalar setting.²

Update rate

Waveform sampling 12 kHz; parameters updated every 0.5 s.²

Communication

RS-485 with Modbus RTU or BACnet MS/TP, selectable; Modbus at 9600 (default), 19200, 38400, 57600, 76800 or 115200 baud, 8 data bits, parity none, even or odd, 1 or 2 stop bits; 1200 m at 100 kbit/s or less; USB always runs Modbus. PS3037-E: Ethernet with Modbus TCP or BACnet/IP, factory IP address 192.168.1.10.^1, 2

Power supply

From the L1 to L2 voltage leads, 80 to 600 V AC RMS CAT III, 50/60 Hz, 90 mA maximum, with a 0.5 A internal fuse. Unregulated 5 V DC output, 140 mA maximum.²

Housing

ABS plastic, 94-V0; 24.2 × 8.5 × 4.0 cm; 340 g without CTs; mounting tabs or TS35/7 DIN rail.²

Environment

Operating -20 to 60 °C (-4 to 140 °F), humidity 5 to 95% non-condensing.²

Approvals

UL listed to UL 61010-1 3rd edition and IEC 61010-2-030; certified to CSA C22.2 No. 61010-1; CE to EN 61000-6-4 Class A.^1, 2

Interface

Documented measurements and integration boundaries for PowerScout 3037.

• Each row of DENT's register tables gives a Modbus register such as 44001 and its offset such as 4000. The manual states that the address sent in the frame is the register minus 40001: register 44062 is sent as 4061 (0x0FDD). FC03 reads 1 to 125 registers; the meter supports no FC04.
• Every register is a 16-bit unsigned value. Readings in registers 44001 to 44061 are multiplied by the data scalar in register 44602 (offset 4601), which holds 0 to 6. With scalar 3, kW, kWh, kVAR, kVARh, kVA and kVAh are in steps of 0.1, amps and volts in steps of 0.1 and power factor in steps of 0.01.
• Scalar table for registers 44001 to 44061: scalar 0 gives 0.00001 for power and energy, 0.01 A and 0.1 V; 1 gives 0.001, 0.1 A and 0.1 V; 2 gives 0.01, 0.1 A and 0.1 V; 3 gives 0.1, 0.1 A and 0.1 V; 4 gives 1, 1 A and 1 V; 5 gives 10; 6 or more gives 100. Power factor is always 0.01.
• 32-bit counters span two registers with the least significant word (LSW) at the lower register: kWh System LSW at 44001 and MSW at 44002. The value is MSW × 65536 + LSW, multiplied by the scalar.
• Absolute (unsigned) system values: kWh System 44001/44002, kW System 44003, kW Demand System Max 44004 and Now 44005, kVARh System 44008/44009, kVAR System 44010, kVAh System 44011/44012, kVA System 44013, displacement PF 44014 and apparent PF 44015 (100 × the value), average amps 44016, average L-L and L-N volts 44017 and 44018.
• Per-phase values: volts L1-L2, L2-L3 and L1-L3 at 44019 to 44021; kWh L1 to L3 at 44023 to 44028 (LSW first); kW L1 to L3 at 44029 to 44031; kVAR L1 to L3 at 44038 to 44040; kVA L1 to L3 at 44047 to 44049; amps L1 to L3 at 44056 to 44058; volts L1-N to L3-N at 44059 to 44061.
• Bi-directional blocks: positive values from 46001, such as Positive kWh System at 46001/46002 and Positive kW System at 46003 (the net sum of the phase powers, or 0 when that sum is negative), and negative values from 47001, such as Negative kWh System at 47001/47002. Line frequency is at 46022 and 47022 as frequency × 10 (602 is 60.2 Hz). The manual prints the scalar table for 44001 to 44061 only, so compare one value from these blocks with ViewPoint before relying on its scaling.
• Net energy: KWh System NET at 44150/44151 (absolute value of the net), NET POS at 46150/46151 and NET NEG at 47150/47151, each LSW first.
• Identity: model name at 44201 to 44205 and serial number at 44206 to 44210 as ASCII, firmware major and minor revision at 44069 and 44070, hardware ID at 44511. Report Slave ID (FC17) returns a string such as "DENT Instruments PowerScout 3037, PS3912001, FW Rev 1.0, Scalar 3".
• Writable registers: clear accumulated measurements 44066 (1234), CT type and ratios 44525 and 44599 to 44601, data scalar 44602, demand window 44603, volts and amps multipliers 44604 and 44605, communication settings 44606 and 44612, service type 44607 and the per-CT registers from 50100. Writing 1 to 44526 sets the Slave ID to Veris H8035/H8036 emulation, with Veris-style registers from 40001. Keep all of them out of a monitoring poll.

Setup

1. Identify the model and protocol

   Read the part number: PS3037-S is serial only and PS3037-E adds Ethernet. Connect ViewPoint over USB and check that the meter is in Modbus mode; a meter in BACnet mode runs MS/TP at 76800 baud by default.

2. Set the address and serial settings

   Set the Modbus address on the MSB and LSB rotary switches in hexadecimal: 01 to F7 are valid and the factory setting is 01, so decimal 100 is MSB 6 and LSB 4. The default Modbus settings are 9600 baud, 8 data bits, no parity and 1 stop bit. Enter the decimal address and the same settings in the Edge serial client or the ZMB-31.

3. Wire the RS-485 port

   Plug the pair and shield into the three-wire COM connector: + on the left, - in the middle and shield on the right. Daisy-chain further meters + to + and - to -.

4. Read the data scalar

   Send FC03 for one register at offset 4601 (0x11F9), register 44602. Note the scalar, 0 to 6, and apply DENT's scalar table to every reading from 44001 to 44061.

5. Read the energy counter and compare it

   Read two registers at offset 4000 (0x0FA0) for kWh System: the first register is the LSW and the second the MSW. Compute MSW × 65536 + LSW, multiply by the scalar and compare the result with ViewPoint's real-time values or the optional display.

6. Add power, voltage and current

   Add kW System at 44003, volts L1-N to L3-N at 44059 to 44061 and amps L1 to L3 at 44056 to 44058. For import and export metering, use the positive block from 46001 and the negative block from 47001. Never write to the configuration, clear or emulation registers.

Common questions

Which address do I send for a PowerScout 3037 register?

Send the register minus 40001, which DENT prints as the offset beside each register. kWh System at register 44001 is offset 4000 (0x0FA0), and register 44062 is 4061 (0x0FDD). A client that adds 40001 itself takes the register number as printed.¹

How do I scale the PowerScout 3037 registers?

Read the data scalar in register 44602 and multiply each reading from 44001 to 44061 by the matching value from DENT's table. With scalar 3, a kW System reading of 3465 is 346.5 kW and an apparent power factor of 87 is 0.87. Choose a scalar that keeps the largest value below 65,535: DENT's example of 1440 kW needs scalar 3, because scalar 1 would overflow.¹

Why does the PowerScout 3037 energy counter look wrong?

Check the word order. DENT puts the least significant word first: kWh System LSW is register 44001 and MSW is 44002. The value is MSW × 65536 + LSW, multiplied by the scalar. A client that assumes the high word first produces a number that is far too large.¹

Does the PowerScout 3037 measure exported energy?

Yes. The positive block from register 46001 holds power and energy while the net system power is positive, the negative block from 47001 holds them while it is negative, and the net registers at 44150, 46150 and 47150 hold the net kWh. The absolute block from 44001 sums absolute values, so it does not separate the two directions.^1, 2

Does the PowerScout 3037 support Modbus TCP?

The PS3037-E does. Its Ethernet port carries Modbus TCP or BACnet/IP, and it ships at the static IP address 192.168.1.10. While Ethernet is connected the RS-485 port is inactive, and the meter must be power-cycled with the cable removed to use RS-485 again. The serial PS3037-S has RS-485 and USB only.^1, 2

Is the PowerScout 3037 still current?

DENT lists the PowerScout 3037 datasheet, manual and BACnet PICS on its Legacy Products page, alongside the PowerScout 24. Installed meters can be read as documented; plan new installations around a current model.³