Veris Industries E30 and E31 BCPM

Compatibility

Compatible with EpiSensor Edge over Modbus RTU

The E30 and E31 are compatible with EpiSensor Edge over Modbus RTU on the data acquisition board's RS-485 port, read through a ZMB-31 Modbus Interface or a Gateway serial port. Veris publishes the E3x point map with integer and float registers, scale registers, word order, model validity and the supported commands.

E30 and E31 boards in models A, B and C, using the E3x point map Rev. A. The map numbers registers from 1, so register 2252 is sent as address 2251. Site check: read the Device ID at register 5 at both Modbus addresses, then compare one branch current with a clamp meter. Read-only monitoring: no writes to the configuration, CT, breaker, alarm, reset or logical circuit registers.

Connect it with

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

Models

Specifications

One E30 or E31 data acquisition board monitors 92 circuits: 84 branch circuits on four strips or adapter boards and two sets of auxiliary inputs for 3-phase mains and neutral, read through 0.333 V AC CTs. The E30 strips carry 21 solid-core 100 A sensors each, on 3/4 in (Square D) or 1 in (GE) spacing; the E31 adapter boards take up to 21 split-core CTs each for retrofit. A breaker size per channel and four user-configurable alarm thresholds can be set in the board, and an optional display shows local readings.^1, 2, 3

Models

E30 + A, B or C board + CT option 0 (100 A, 3/4 in) or 1 (100 A, 1 in) + 42 (2 strips) or 84 (4 strips), for example E30A042. E31 + A, B or C board + 002 or 004 adapter boards without CTs, or 42 or 84 with 50 A CTs and ribbon cables. E31 CT six-packs: E31CT0 (50 A, 6 ft leads), E31CT0R20 (50 A, 20 ft) and E31CT2 (100 A, 4 ft).^2, 3

Branch accuracy

E30: current 1% of reading from 2 to 100 A and 2% from 0.25 to 2 A; power 3% of reading from 1 to 100%. E31: current 2% of reading from 2 to 100 A and 3% from 0.25 to 2 A; power 3% from 2 to 100 A and 4% from 0.25 to 2 A, at ±0.8 PF.^2, 3

Mains accuracy

Voltage 1% of reading from 90 to 277 V L-N; auxiliary power to IEC 61036 Class 1 and ANSI C12.1-2001; auxiliary current 2% of reading from 1 to 10% and 1% from 10 to 100% of CT rating (0.333 V AC).^2, 3

Operation

Input power 90 to 277 V AC, 50/60 Hz; sampling 2560 Hz; update about every 1.8 s for both panels; overload capability 10 kAIC; ribbon cables up to 20 ft (6 m).^2, 3

Communication

Modbus RTU on RS-485, DIP-switch selectable 2-wire or 4-wire; address 1 to 247 in pairs of 2; 9600, 19200 or 38400 baud; parity none, odd or even; 8 data bits, 1 stop bit; 5-position pluggable connector TX+, TX-, SHIELD, TX+/RX+ and TX-/RX-.^1, 2, 3

Environment

Operating 0 to 60 °C, below 95% RH non-condensing; storage -40 to 70 °C.^2, 3

Approvals

UL listed (44XJ, IND. CONT. EQ.).^2, 3

Interface

Documented measurements and integration boundaries for E30 and E31 BCPM.

• The map numbers registers from 1 and gives no zero-based column: register 1 is the serial number MSW and register 5 the Device ID. Read the numbers as one-based Modbus registers, so register 5 is sent as address 4 and register 2252 as 2251 (0x08CB). The Device ID read in the worked check proves the convention.
• Two Modbus addresses: the primary address is set on the main board's DIP switches and the secondary is always the primary plus 1. Each address carries the whole map for one pair of CT strips and one set of 4 auxiliary inputs.
• Supported commands: FC03 Read Holding Registers, FC06, FC16 and FC17 Report Slave ID, which returns a string such as "Veris Model Exxx Branch Circuit Monitor, S/N=0x12345678, Location=...". The map lists no FC04.
• Device ID at register 5: 15172 is model A (current and power on all channels plus voltage), 15171 model B (current on branch channels, power on the auxiliary channels, plus voltage) and 15170 model C (current only, no voltage). Channels a model does not support read 0x8000 in integer registers and 0x7FC00000 in floats.
• Integer registers are signed 16-bit values multiplied by 10 to the power held in their scale register: register 1336 (channel 1 current) with scale register 1000 at -1 gives the value times 0.1. A parameter with no scale register listed has scale 0. 32-bit integers such as kWh put the MSW in the lower register, and the energy scale applies to the whole 32-bit value.
• Floats are read-only 32-bit IEEE 754 values with the MSW in the lower register: 3.14159 is 0x40490FD0, MSW 0x4049 then LSW 0x0FD0. They need no scale register.
• Mains voltages, models A and B: frequency at 245 (float 600/601), L-N average 246 (602/603), L-L average 247 (604/605), A-N, B-N and C-N at 248 to 250 (floats 606, 608 and 610) and A-B, B-C and C-A at 251 to 253 (floats 612, 614 and 616), with voltage scale register 244.
• Auxiliary (mains) inputs 43 to 46: 3-phase kWh at 254/255 (float 618/619, energy scale 291); 3-phase total kW at 256 (float 620/621); 3-phase PF at 257 (float 622/623); kW phase 1 to 3 at 259 to 261 (floats 626 to 630); current phase 1 to 4 at 265 to 268 (floats 638 to 644), where phase 4 is neutral; present and maximum 3-phase kW demand at 277 and 278 (floats 662 and 664); 3-phase kVA at 540 (float 676).
• Branch circuits 1 to 42 in the 1PH map, with N the channel number: current at integer 1335 + N (float 2250 + 2N, scale register 999 + N) on all models; kW at integer 1251 + N (float 2082 + 2N, scale 1041 + N), PF at 1293 + N (float 2166 + 2N, fixed scale -3) and kWh at integer 1166 + 2N and 1167 + 2N (float 1998 + 2N, energy scale 1083 + N) on model A.
• Diagnostics: Device Health at register 532 flags frequency out of range, voltage clipping per phase, current clipping and a strip connection error; register 531 counts power-ups. The board updates its values about every 1.8 s.
• Writable registers: configuration 6 (feed and numbering layout, which also clears logical circuits when changed), location string 7 to 70, demand set-up 71 and 72, CT sizes 73 to 118, breaker sizes and alarm thresholds from 119, per-channel resets 1126 to 1167, AUX reset 294, global reset 295 (12345 resets the device), the real-time clock 554 to 557 and logical circuit assignment from 62068. Keep all of them out of a monitoring poll.

Setup

1. Identify the board and kit

   Read the model number on the board: A, B or C sets which values exist, and the kit code gives the number of strips or adapter boards. A kit with four strips or adapter boards uses both of the board's Modbus addresses.

2. Set the address and serial settings

   Set the DIP switches for 2-wire RS-485, the Modbus address (the secondary address is this address plus 1), the baud rate (9600, 19200 or 38400) and parity. Enter the same settings, with 8 data bits and 1 stop bit, in the Edge serial client or the ZMB-31.

3. Wire the RS-485 pair

   Wire the pair and shield to the 2-wire terminals of the 5-position connector and daisy-chain further boards on the same pair.

4. Read the Device ID at both addresses

   Send FC03 for one register at address 4, register 5, at the primary and the secondary Modbus address. Expect 15172 for model A, 15171 for model B or 15170 for model C.

5. Compare one branch current

   Read channel 1 current as a float at register 2252 (address 2251) and compare it with a clamp meter on the same breaker, then check the mains voltage at register 606 against the panel voltage.

6. Add the circuits

   Add branch currents for all models, and branch kW and kWh for model A, using the floats. Read the auxiliary inputs for the mains. Never write to the configuration, CT, breaker, alarm, reset or logical circuit registers.

Common questions

Why does an E30 or E31 answer at two Modbus addresses?

Each board serves two pairs of CT strips or adapter boards and two sets of auxiliary inputs. The primary address set on the DIP switches carries the first pair and the secondary address, always the primary plus 1, carries the second, each with the complete point map. Address boards in steps of two on a shared bus.^1, 2

How do I know whether an E3x board reports branch power?

Read the Device ID at register 5. 15172 is model A, with current and power on every channel; 15171 is model B, with branch current and power on the auxiliary inputs only; 15170 is model C, current only. Registers a model does not support return 0x8000 or 0x7FC00000.¹

How do I scale the E3x integer registers?

Multiply each integer register by 10 to the power held in its scale register. Channel currents use scale registers 1000 to 1041, branch kW 1042 to 1083 and branch kWh 1084 to 1125, and power factor has a fixed scale of -3. The floats need no scaling, so read those where the client supports them.¹

Does the E3x map use zero-based or one-based registers?

The map numbers registers from 1 and gives no zero-based column, so send the register number minus one: register 5 goes on the wire as address 4. A Device ID read proves it, because the register next to it holds the configuration value 0 to 3.¹