Rayleigh Instruments RI-F400 and RI-F300

Compatibility

Compatible with EpiSensor Edge over Modbus RTU

The RI-F400-G-C and RI-F300-G-C are compatible with EpiSensor Edge over Modbus RTU on their RS485 terminals, read through a ZMB-31 Modbus Interface or a Gateway serial port. Rayleigh publishes the register list for each model with decimal and hex addresses, data structure, length and unit.

RI-F400-G-C and RI-F300-G-C, read with Rayleigh's register documents RI-F400-C-COMM V01 and RI-F300-C-COMM V01. Site check: read Voltage V1-N from wire address 0x0000 as a float with the words reversed and compare it with the display. Read-only monitoring: no writes to the password, settings, resets or factory default registers.

Connect it with

• Modbus Interface ZMB-3X From €399 ex VAT Configure
• Gateway ZGW-20 From €899 ex VAT Configure

Models

Specifications

Both meters show voltage, current, power factor, THD, frequency, power, demand, run hours and import and export energy on a white backlit LCD, and take their supply from the measured voltage. They connect single phase (selectable phase on the RI-F400, L1 on the RI-F300) or three phase four wire, and a Voltage OUT connector daisy-chains the supply to up to 32 meters.^2, 4

Models

RI-F400-G-P pulse output, RI-F400-G-C Modbus and pulse output; RI-F300-G-P pulse output, RI-F300-G-C Modbus and pulse output, RI-F300-G-MB M-Bus and pulse output.^2, 4

Accuracy

Voltage and current 0.5% of full scale, frequency 0.1% of full scale, power factor 1% of unity, active, reactive and apparent power 1%, THD 3%; active energy class 1 to IEC/EN 62053-21 (RI-F300 also class B to IEC/EN 50470), reactive energy class 2 to IEC/EN 62053-23.^2, 4

Inputs

RI-F400: 100 to 240 V L-N, 173 to 415 V L-L, easywire 330 mV current input (396 mV maximum), CT primary 1 to 10000 A, VT primary 100 V to 500 kV. RI-F300: 100 to 240 V L-N MID approved, easywire 1 A current input (1.2 A maximum), CT primary 1 to 6000 A, VT primary 100 to 600 V, 50 Hz MID approved.^2, 4

Communication

RS485 Modbus, address 1 to 255, 8 data bits, no, odd or even parity, 300 to 19200 baud, response time 100 ms or less, 32 meters per bus (255 with a repeater), 500 m from the master; factory settings 9600 baud, no parity, 1 stop bit, slave ID 1.^1, 2, 3

Supply

Self-supplied from the measuring input: L1 to N on the RI-F400, any phase on the RI-F300; under 6 VA on the supplying phase.^2, 4

Housing

DIN 96 panel mounted, 99 × 99 × 50 mm, panel up to 6 mm thick, self-extinguishing polycarbonate (UL94 V-0), IP54 front and IP20 terminals, under 240 g; RJ45 current inputs and pluggable voltage, RS485 and pulse terminal blocks.^2, 4

Environment

Operating -10 to +55 °C, storage -20 to +70 °C, 0 to 85% RH non-condensing; installation category III, pollution degree 2, 300 V L-N insulation.^2, 4

Conformity

EMC to IEC/EN 61326-1, EN 55011 class A and IEC/EN 61000-4-2, -3, -4, -5, -6, -8 and -11; safety to IEC/EN 61010. RI-F300: MID B+D, IEC/EN 50470-1/3, M1 mechanical and E2 electromagnetic environment.^2, 4

Interface

Documented measurements and integration boundaries for RI-F400 and RI-F300.

• Rayleigh prints a decimal address from 30000 beside a hex start register for every row: Voltage V1-N is 30000 at 0x00 and Total net kWh is 30058 at 0x3A. The hex value is the zero-based address on the wire, and the decimal number is that address plus 30000 (one row prints 0x4B for 30076, where the decimal sequence gives 0x4C). The settings rows start again at 40000 with hex 0x00.
• The header lists functions 3 and 4, and the Function column marks the measurement rows 3 and the settings rows 4. The settings rows are read and written, so the column reads as the 3X input and 4X holding tables rather than a function code. Read the measurements with FC04 first; if the meter answers with an illegal function exception, read the same address with FC03.
• FLOAT REVERSE WORD is a 32-bit IEEE float in two registers with the low-order word first: Rayleigh's example places the least significant half of Total net kWh in register 30058 and the most significant half in 30059. In Edge, choose a float with the words swapped.
• Voltages V1-N, V2-N and V3-N at 30000, 30002 and 30004 (hex 0000, 0002, 0004) and their average at 30006; V1-2, V2-3 and V3-1 at 30008, 30010 and 30012 and their average at 30014; all in V.
• Currents I1, I2 and I3 at 30016, 30018 and 30020 (hex 0010, 0012, 0014), average current at 30022 and calculated neutral current at 30122 (hex 007A), in A.
• Power in kW, kVA and kVAr: kW1 to kW3 at 30024 to 30028, kVA1 to kVA3 at 30030 to 30034, kVAr1 to kVAr3 at 30036 to 30040; Total kW at 30042 (hex 002A), Total kVA at 30044 and Total kVAr at 30046. Power factor PF1 to PF3 at 30048 to 30052, average PF at 30054 and frequency at 30056 (hex 0038) in Hz.
• Energy in kWh, kVArh and kVAh: Total net kWh at 30058 (hex 003A), Total net kVAh at 30060 and Total net kVArh at 30062; Total kWh (Imp) at 30096 (hex 0060) and Total kWh (Exp) at 30098 (hex 0062); Total kVArh (Imp) at 30112 and (Exp) at 30114; per-phase import and export from 30084 and per-phase kVAh at 30116 to 30120. Run hour at 30082 in hours.
• Demand and THD: maximum and minimum kW, kVAr and kVA from 30064, maximum current demand per phase from 30074; THD of each voltage and current from 30124 to 30140, in %. Serial number at 30684 (hex 02AC), two registers in hex; phase sequence at 30700 (hex 02BC), 0 clockwise, 1 anticlockwise, 2 invalid.
• RI-F300 only: a second block from 31000 (hex 03E8) repeats the readings as integers in mV, mA, W and VA, with energy in Wh, VArh and VAh in three registers per value, and rollover counters at 31200 to 31221 that count each roll of an energy register from 99999999 to 0. The map gives no word order for the three-register values, which Edge cannot read as one number, so use the float block for energy.
• Settings start at 40000: password at 40000 (default 1000), network selection at 40001, CT primary at 40003, slave ID at 40007, baud rate at 40008, parity at 40009 and stop bit at 40010. The RI-F400 map also has factory default (40012), energy resets (40013 to 40015, 40044), demand resets and page settings. Keep all of them out of a monitoring poll.

Setup

1. Identify the model

   Check that the label reads RI-F400-G-C or RI-F300-G-C. The -G-P versions have only the pulse output and the RI-F300-G-MB has M-Bus instead of Modbus.

2. Read the communication settings

   Enter the meter's programming menu with its password (1000 from the factory, according to the register map) and step through the slave ID, baud rate, parity and stop bit settings. Enter the same values in the Edge serial client or the ZMB-31. On the RI-F300, the settings the datasheet marks in red lock 15 minutes after programming mode is entered.

3. Wire the RS485 pair

   Connect the RS485 + and - terminals in a daisy chain with no stubs and keep the bus within 500 m of the master.

4. Find the function code

   Read two registers from wire address 0x0000 with FC04. If the meter answers with an illegal function exception, repeat the read with FC03 and use that function for every measurement.

5. Check the word order

   Decode Voltage V1-N with the second register as the high word and compare it with the V1-N display. If it does not match, the read is on the wrong address or the words are not swapped.

6. Add energy and power

   Add Total kWh (Imp) at wire address 0x0060 and Total kWh (Exp) at 0x0062, then power and power factor, and compare the energy with the kWh display. Never write to the password, reset or factory default registers.

Common questions

Which address do I send for RI-F400 register 30000?

Send 0x0000. Rayleigh prints a hex start register beside every decimal address, and the decimal number is 30000 plus that hex value: Total net kWh is 30058 at 0x3A and Total kWh (Imp) is 30096 at 0x60. A client that numbers registers from one enters the hex value plus one.^1, 3

What word order do the RI-F400 floats use?

The low-order word comes first. Rayleigh calls it FLOAT REVERSE WORD and shows Total net kWh with its least significant half in register 30058 and its most significant half in 30059. Set the Edge float point to swap words, then check one value against the display.¹

Does the RI-F400 use function 03 or function 04?

Rayleigh's header lists functions 3 and 4, and its Function column marks the measurements 3 and the settings 4. Because the settings are read and written, the column reads as the register table rather than a function code. Start with FC04 for the measurements and fall back to FC03 on an illegal function exception.^1, 3

Can I read import and export energy separately?

Yes. Total kWh (Imp) is at 30096 and Total kWh (Exp) at 30098, with Total net kWh at 30058, the per-phase import and export counters from 30084 and reactive import and export at 30112 and 30114. All are reverse-word floats in kWh or kVArh.^1, 3

Is the RI-F300 suitable for billing, and can its energy be reset over Modbus?

The RI-F300 is MID B+D certified to IEC/EN 50470 for billing applications, and its datasheet says the programming values lock 15 minutes after programming mode is entered. Its Modbus map has no energy reset register, unlike the RI-F400 map, which has reset registers at 40013 to 40015 and 40044.^1, 3, 4

How many RI-F400 meters can share one RS485 bus?

Rayleigh's datasheet gives 32 meters on one bus, up to 255 with an RS485 repeater, and 500 m from the master. Each meter needs its own slave ID from 1 to 255.²