Type Modbus RTU
Connection DIP switch-selectable 2-wire or 4 -wire, RS-485
Address DIP switch-selectable address 1 to 247 (in pairs of 2)*
Baud Rate DIP switch-selectable 9600, 19200, 38400
Parity DIP switch-selectable NONE, ODD, EVEN
Communication Format 8-data-bits, 1-start-bit, 1-stop-bit
Termination 5-position depluggable connector
(TX+ TX- SHIELD TX+/RX+ TX-/RX-)
Mechanical:
Ribbon Cable Suppor t 4 ft. (0.9 m) at ribbon cable ships standard;
up to 20 ft. (6 m) available
Environmental:
Operating Temperature Range 0° to 60°C (32° to 140°F) (<95% RH noncondensing)
Storage Temperature Range -40° to 70°C (-4 0° to 158°F)
Altitude of Operation 3000 m
Agency Approvals UL508, EN61010
* See Conguration section for de tails.
NOTICE
• This product is not intended for life or safety applications.
• Do not install this product in hazardous or classified locations.
• The installer is responsible for conformance to all applicable codes.
• Mount this product inside a suitable fire and electrical enclosure.
FCC PART 15 INFORMATION
NOTE: This equipment has been tested by the manufacturer and found
to comply with the limits for a class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in
a residential area may cause harmful interference in which case the
user will be required to correct the interference at his own expense.
Modifications to this product without the express authorization of
Veris Industries nullify this statement.
Product IdentIfIcatIon
Description
E31
A = Advanced b oard
B = Interme diate board
C = Basic boa rd
# of CTs
002 = 2 adapter b oards, no CTs, no cable s
004 = 4 adap ter boards, no CTs, no cab les
42 = 2 adapter boa rds, 42 50A CTs, 4 ft. round r ibbon cables
84 = 4 adapter b oards, 84 50A CTs, 4 ft . round ribbon ca bles
Alta Labs, Enercep t, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘ V’ logo are trademark s or registered tradema rks of Veris Industries, L.L .C. in the USA and /or other coun tries.
e31
TM
INSTALLATIoN GUIDe
quIck Install
Observe precautions for handling static sensitive
devices to avoid damage to the circuitry that
is not covered under the factory warranty.
1. Disconnect and lock out power. Use a properly rated voltage sensing device to
conrm power is o.
2. Mount the main acquisition board in the electrical enclosure.
3. Mount adapter boards to either DIN Rail or SNAPTRACK™.
4. Connect adapter boards to the main board via ribbon cable (sold separately).
5. Connect current transducers to the adapter boards.
6. Snap current sensors onto the conductors to be monitored. Note: ensure that
each split-core CT is closed and firmly seated.
7. Secure wires using strain relief cable ties.
8. Congure communication and addressing parameters using DIP switches.
9. Wire RS-485 communications.
10. Connect CTs to the auxiliary inputs and connect them onto the main conductors
in the enclosure (optional).
11. Wire control power and voltage taps (E31A and E31B only).
12. Download the free E3x conguration tool from www.veris.com to commission the
device for operation.
dImensIons
Circuit Board and Mounting Bracket
3.9”
(100 mm)
Ø = 0.2”
(5 mm)
1.00”
(26 mm)
8.3”
(211 mm)
7.3”
(184 mm)
8.9”
(288 mm)
7.9”
(200 mm)
Adapter Board
(26 mm)
(117 mm)
1.00”
4.6”
2.75”
(70 mm)
1.75”
(45 mm)
4.8”
(122 mm)
5.8”
(146 mm)
oPeratIon
The E31 Series Branch Current Monitor is designed to measure the current, voltage,
and energy consumption of up to 92 circuits (84 branch circuits, 2 3-phase mains, 2
neutrals) on a single board. One E31 can monitor up to two panels.
The E31 consists of a data acquisition board and up to 84 split-core current sensors
(50A, 100A, or 200A), with eight auxiliary inputs. Each conductor passes through a
current sensor and terminates at the breaker. Each sensor transmits the current data
to the data acquisition board.
Data is transmitted using an RS-485 Modbus protocol. Each data acquisition board
requires two addresses, one for each set of 42 current sensors and four auxiliary
inputs. Data is updated roughly every two seconds. As a circuit approaches the userdened threshold, the E31 activates the alarm indicators.
The E31A measures both current and power for the mains and branch circuits. The
E31B measures both current and power for the mains, and current only in each circuit.
The E31C measures current only for the mains and branch circuits.
Current Sensors
D
C
B
D
C
B
B
C
A
A
E
A
E
E
D
50 Amp
A = 1.0” (26 mm)
B = 0.5” (11 mm)
C = 0.4” (10 mm)
D = 0.9” (23 mm)
E = 1.6” (40 mm)
100 Amp
A = 1.2” (29 mm)
B = 0.8” (20 mm)
C = 0.7” (16 mm)
D = 1.6” (40 mm)
E = 2.1” (53 mm)
200 Amp
A = 2.6” (66 mm)
B = 1.1” (28 mm)
C = 0.8” (19 mm)
D = 2.9” (74 mm)
E = 3.5” (90 mm)
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e31
TM
INSTALLATIoN GUIDe
Product dIagram
AA
1
BB
12
8
2
3
4
5
6
1. 50-Pin Ribbon Cable Connectors: Ribbon cables attach here for easy
connection of adapter boards to the data acquisition board. The two connectors
on the left are for panelboard 1; the two on the right are for panelboard 2.
Note: Connect Adapter Boards A and B to the correct ribbon cable connectors
for each panel. The top connec tor is for Adapter Board A, and the bottom
connector is for Adapter Board B.
Note: Ribbon Cable is not included with all E31 models. For ribbon cable
options, see Recommended Accessories on page 11.
2. Auxiliary Inputs: These 0.333VAC inputs are used for monitoring the main
breaker or other high amperage source. Inputs on the lef t are for panelboard 1;
inputs on the right are for panelboard 2.
3. Control (Mains) Power Connection: Easy 2-wire 90-277 VAC 50/60 Hz
connection.
4. Control Power Fuse: 600VAC, 500mA time lag, factory-replaceable.
5. Alive LED: Red/green/amber LEDs. Blink codes are on page 3.
6. Voltage Taps: 1, 2, or 3 phase plus neutral connections. For voltage sensing and
power calculations (no voltage taps on the E31C). Voltage taps are shared by both
panels.
7. Communications Address DIP Switch: Each Modbus device must have a unique
address. Switches are binar y weighted. Left-most switch has a value of 1; rightmost switch has a value of 128. Note: switches set the address for panel 1; panel 2
is automatically set to (Panel 1 address + 1). See Conguration section for details.
9. RS-485 Connection: Used for Modbus serial communications. The Universal plug
accomodates 2 or 4 wire connections.
10. RS-485 LEDs: The RX LED (closest to DIP switches) indicates the RS-485 is
receiving information; the TX LED indicates transmission of information.
11. Power LED: Indicates power to main board
12. Branch Current Sensors: Each split-core current sensor is capable of monitoring
conductors rated up to a maximum of 50, 100, or 200 amps. Up to 84 sensors can
be purchased with the E31 (see Recommended Accessories on page 10). One of
each style is pic tured here.
Alta Labs, Enercep t, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘ V’ logo are trademark s or registered tradema rks of Veris Industries, L.L .C. in the USA and /or other coun tries.
Observe precautions for handling static sensitive
devices to avoid damage to the circuitry that
is not covered under the factory warranty.
Disconnect power to the electrical panel and lock it out.
1. Install the acquisition board mounting bracket in the panel using screws and bolts
provided Panels can be oriented side-by-side (Figure 1A) or vertically (Figure
1B). A grounding connection is located on the mounting bracket, near the lower
right corner. Use this stud to ground the bracket when mounting on a nonconductivesurface.
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e31
TM
2. Mount the adapter boards to either DIN rail or SNAPTRACK.
A. DIN Rail: Use the supplied screws to secure the plastic DIN clip to the
adapter board. Ax the clip to the DIN rail (Figure 2).
B. SNAPTRACK: Secure the SNAPTRACK to the mounting surface. Click the
adapter board into place (Figure 3).
Figure 2Figure 3
DIN Option 1: Vertical Mount
DIN Option 1: Horizontal Mount
INSTALLATIoN GUIDe
3. Connect adapter boards to the main board using ribbon cable (Figure 4). Ribbon
cables are keyed to ensure proper installation. Orient cables so that the red
stripe is on the left.
Note: Flat and round ribbon cable are available from Veris. See
Recommended Accessories (page 10)
4. Connect current sensors to the terminals on the adapter boards (Figure 4).
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e31
TM
INSTALLATIoN GUIDe
5. Install the current sensors onto the conductors to be monitored (Figure 5).
Sensors can be mounted facing either direction; orientation does not aec t meter
accuracy. Note: Clean split-core contacts before closing. The hinge can detach,
allowing the base and the top to separate for easier cleaning and installation.
Figure 5
The 50 A CT accepts a maximum #2 AWG
(0.384” O.D.) wire with THHN insulation.
The 100A CT accepts a maximum 3/0 AWG
(0.584” O.D.) wire with THHN insulation.
The 200A CT accepts a maximum of 350 MCM
wire with THHN insulation.
Use this gauge wire or smaller for each ci rcuit.
Close CTs until the clasp cl icks
into place to ensur e that contact
surfaces are fi rmly seated.
✓
7. The adapter boards are silk screened with two rows of numbers. For applications
that require odd/even branch circuit numbering, use the row designated ODD or
EVEN. For applications that require sequential numbering, use the number row
marked SEQ (Figure 7).
6. Plastic cable ties are included with the product for strain relief. Insert the strain
relief device into one of the available holes on the adapter board (Figure 6A).
Gather all current sensor wires connected to that adapter board and secure the
cable tie around them (Figure 6B).
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e31
I1
I2
I3
IN
I1
I2
I3
IN
±
±
±
±
±
±
±
±
TM
8. Congure communication and addressing parameters using DIP switches. The E31
requires two addresses, one for each set of 42 current sensors and four auxiliary
inputs. See the Conguration section for more information.
9. Wire RS-485 communications (see diagrams in Wiring section).
10. Connect 0.333VAC current transducers (CTs) to the main conductors by snapping
CTs around lines, observing local codes regarding bending radius (optional;
Figures 9, 10).
INSTALLATIoN GUIDe
Figure 9
Panel 1Panel 2
Recommended CT:
Veris Industries H6810, H6811, H6812 Series with 0.333VAC output.
Available in 100A max. to 2400A max.
Call a Veris sales rep if higher amperages a re required.
Fig ure 10
CT Input
(0 -0.333 VAC)
Set up Modbus registers 115-118 for CT scaling.
Use base + 1 address for Panel 2 setup.
Note: (+) represents black, (-) represents white
11. Connect 2-wire 90-277VAC power to main power terminals. Observe polarity. For
the E31A and E31B, connect voltage lines to the voltage taps (Figure 11). Equip
voltage lines with fuses.
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L - LL - N
Line to Line (L-L) Voltage: 150 to 480 VAC
Line to Neutral (L-N) voltage: 90 to 277 VAC
Voltage taps are shared by both panels.
e31
+
TM
WIrIng
Power must be disconnected and locked out before making any wiring connections.
1. Connect 2-wire or 4-wire Modbus RS-485 daisy chain network (Figures 12 and 13).
INSTALLATIoN GUIDe
Fi gu re 12
SHIELD
RX- TX-
RX+ TX+
TXTX+
Fi gu re 13
2-Wire4-Wire
Master or Slave
TX+
TX-
RX+
TX+
SHIELD
RX-
TX–
SHLD
SHIELD
2. Mechanically secure the RS-485 cable where it enters the electrical panel.
3. Connect all RS-485 devices in a daisy-chain fashion, and properly terminate the
chain (Figure 14).
4. Shield the RS-485 cable using twisted-pair wire, such as Belden 1120A. The cable
must be voltage-rated for the installation.
Fi gur e 14
TX+
Master
TX+
TX-
TX–
RX+
SHLD
RX-
SHIELD
TX+
Slave
TX+
TX-
TX–
RX+
SHLD
RX-
SHIELD
2-Wire Example
Belden 1120A or
equivalent
120 Ω terminator
on last device of
daisy chain
5. When tightening terminals, ensure that the correct torque is applied: 0.5 to 0.6
N·m (0.37 to 0.44 ft·lb ) for connectors on main board, 0.22 to 0.26 N·m (0.16 to
0.19 ft·lb) for connectors on adapter boards (Figure 15).
WARNING: After wiring the RS-485 cable, remove all
scraps of wire or foil shield from the electrical panel.
Wire scraps coming into contact with high voltage
conductors could be DANGEROUS!
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e31
TM
confIguratIon
1. Communications Conguration: Communications parameters for the E31 series
are eld selectable for your convenience. Please see the Product Diagram section
(page 2) for selector location. The following parameters are congurable:
• Baud Rate: 9600, 19200, 38400
• Parity On or O
• Parity: odd or even
• Wiring: 2 or 4
Example: 2-wire 19200 Baud No Parity
Bø
B1
Off/
On
Parity
Odd/
Even
Parity
2/4
Wire
Reserved
INSTALLATIoN GUIDe
3. The E31 uses two logical addresses. Panel 1 uses the base address as set on the DIP
switches, and Panel 2 uses this base address + 1. Address the E31 as any whole
number between and including 1-246. Each unit is equipped with a set of 8 DIP
switches for addressing. See below.
=
1
LSBMSB
1 2 4 8 16 32 64 128
4. To determine an address, simply add the values of any switch that is on.
For example:
LSB
Switch number 4 has an ON Value of 8 and switch number 6 has an ON Value of 32.
(8 + 32 = 40). Therefore, the address for Panel 1 is 40, and the address for Panel 2 is
41.
DIP Switch Values
=
40
MSB
12345678
ooXXX9600
onoXXX19200
oonXXX38400
ononXXXReserved
ooXXXNo Parity
onoXXXOdd Parity
oonXXXNo Parity
ononXXXEven Parity
onXXX4-wire RS-
485
oXXX2-wire RS-
485
2. Address Conguration: Each Modbus device on a single network must have
a unique address. Set the switch block to assign a unique address before the
device is connected to the Modbus RS-485 network. If an address is selected that
conicts with another device, neither device will be able to communicate.
See the Address Setup section (page 9) for a pictorial listing of the rst 63 switch
positions.
default dIP sWItch settIngs
The E31 includes two DIP switches, as shown below. Switches are shown in their
default positions.
Alta Labs, Enercep t, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘ V’ logo are trademark s or registered tradema rks of Veris Industries, L.L .C. in the USA and /or other coun tries.
Alta Labs, Enercep t, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘ V’ logo are trademark s or registered tradema rks of Veris Industries, L.L .C. in the USA and /or other coun tries.
e31
TM
INSTALLATIoN GUIDe
commIssIonIng
1. Reconnect power to the panel.
2. Congure installation mode using Modbus Register 6.
3. Congure CT scaling.
4. Congure alarms.
5. Congure demand.
Download the free E3x conguration tool from www.veris.com to commission the
device for operation.
recommended accessorIes
Part IDDescription
CBL008Flat ribbon cable, 50 x 28 AWG, 1.5 ft. (0.45 m)
CBL016Flat ribbon cable, 50 x 28 AWG, 4 ft. (1.2 m)
CBL017Flat ribbon cable, 50 x 28 AWG, 5 ft. (1.5 m)
CBL018Flat ribbon cable, 50 x 28 AWG, 6 ft. (1.8 m)
CBL019Flat ribbon cable, 50 x 28 AWG, 8 ft. (2.4 m)
CBL020Flat ribbon cable, 50 x 28 AWG, 10 ft. (3.0 m)
CBL021Flat ribbon cable, 50 x 28 AWG, 20 ft. (6.1 m)
CBL022Round ribbon cable, 50 x 28 AWG, 4 ft. (1.2 m)
CBL023Round ribbon cable, 50 x 28 AWG, 10 ft. (3 m)
CBL024Round ribbon cable, 50 x 28 AWG, 20 ft. (6 m)
CBL025Flat ribbon cable, 50 x 28 AWG, 2 m
CBL026Flat ribbon cable, 50 x 28 AWG, 4 m
CBL027Flat ribbon cable, 50 x 28 AWG, 6 m
CBL031Round ribbon cable, 50 x 28 AWG, 1.5 ft. (0.45 m)
CBL032Round ribbon cable, 50 x 28 AWG, 2.5 ft. (0.76 m)
E31CT0Six-pack 50 A CT, 6 ft. (1.8 m) lead
E31CT0R20Six-pack 50 A CT, 20 ft. (6 m) lead
E31CT1Six-pack 100 A CT, 6 ft. (1.8 m) lead
E31CT1R20Six-pack 100 A CT, 20 ft. (6 m) lead
E31CT3Single 200A CT, 6ft (1.8m) lead
E31CT3R20Single 200A CT, 20ft (6m) lead
E31CTDB2 E31 Adapter boards
AE001E3x MCB Cover
AV01Veris DIN Rail
safety
If Veris E31 products are used in installations with circuits higher than the product
ratings, the circuits must be kept segregated per UL508A Sec. 17.5.
Note: 277/480VAC Wye connected (center grounded) power systems operate
within the 300VAC line to neutral safety rating of the E3x series, and the
operational voltage limit (single-phase connection) as the line to neutral
voltage is 277VAC in such power systems. Corner-grounded delta 480VAC
systems would not qualif y, as the actual line to earth voltage is 480VAC on
each leg, exceeding the E3x ratings.
Note: E3x internal circuitr y (cables and CTs) are not circuits as dened by
UL508A, as they do not extend beyond the E3x itself without further safety/
re isolation.
UL listed under standard 508 as an “open type device.”
Maximum ambient air temperature for use is 60°C.
Installation categor y: CAT III
The E31 Series must be installed in an appropriate electrical and re enclosure per
local regulations.
For use in a Pollution Degree 2 or better environment only.
A Pollution Degree 2 environment must control conductive pollution and the
possibility of condensation or high humidit y. Consideration must be given to the
enclosure, the correct use of ventilation, thermal properties of the equipment and the
relationship with the environment.
If the equipment is used in a manner not specied by the manufacturer, the
protection provided by the device may be impaired.
IEC/EN 61010-1
This symbol indicates an electrical shock hazard exists.
Documentation must be consulted where this symbol is used on the
product.
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TM
troubleshootIng
ProblemSolution
Product is not communicating over Modbus daisy chain
RX LED is solid
The main board has a fast ashing amber light
The main board has a slow ashing amber light
The main board has a ashing green light
The main board is a ashing or solid red light
Split-core product is reading zero for some values
Power factor reading is not as expected
Current reading is not as expected, or reading is on dierent CT
number than expected
Current is reading zero, even when small currents are still
owing through circuit
E3x Cong Tool returns Modbus error on read/write
e31
• Check the unit Modbus address to ensure that each device on the daisy chain has a unique address.
• Check Parity.
• Check the communications wiring.
• Check that the daisy chain is properly terminated.
• Check for reversed polarity on Modbus comms.
• Check for sucient biasing on the Modbus bus. Modbus physical specication calls for 450-650 Ω biasing. This is usually
provided by the master.
• Verify ribbon cable connectors are inserted in the correct orientation.
• If cables are correct, reset main board to re-initialize product.
• One or more channels is clipping. This can be caused by a signal greater than the split-core size or 277 V L-N, or by a signal
with high THD near the gain stage switching points (1.5 A and 10 A).
• Everything is wired properly and the main board has power.
• Light may be red briey while device powers up.
• If light is red for more the 60 sec. device has encountered a diagnostic event. Contact technical support.
• Device was unable to read split-core adapter boards on power up. Verify adapter boards are connected.
• Verify ribbon cable connectors are inserted in the correct orientation.
• Reset main board to re-initialize product.
• Verify voltage taps are connected in appropriate phase rotation.
• Verify phase rotation of breakers (rmware rev. 1.012 or higher allows for custom rotation if needed).
• Verify ribbon cable is fully seated and in the correct orientation.
• The product cuts o at 50 mA, and will set the reporting register to 0 mA for currents near or below this range.
• Verify using the latest release of E3x Cong Tool as older versions may not support all features in current product rmware.
Latest version is available on our website http://www.veris.com/modbus.aspx
Alta Labs, Enercep t, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘ V’ logo are trademark s or registered tradema rks of Veris Industries, L.L .C. in the USA and /or other coun tries.
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