DAE INSTRUMENT SMB350 User manual

SMB350
User’s Manual
2020/05/27 Version : 3.3e
DAE Instrument Corp. http://www.DAEinstrument.com/

SMB350 User’s Manual
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SMB350 User’s Manual
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SMB350 User Manual, 2020, May
Copyright
© 2020 DAE Instrument Corp. All rights reserved.
DAE Headquarters
5F, No. 157, Xinhu 1st Road, Neihu District, Taipei 11494, Taiwan, R.O.C.
Tel：[phone] Fax：[phone]
e-mail：[email protected]
DAE Controls LLC.
3124 Chesapeake Dr. Sterling Heights, MI 48314, USA
Tel：[phone] Fax：[phone]
e-mail：[email protected]

SMB350 User’s Manual
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Safety Precautions
Please read these safety instructions before using this equipment.
For safety purposes, please observe the following when unwrapping and installing the
package：
1. When opening the package, check that the contents have not been damaged during
transit.
2. Check to make sure that the product model and the labeling on the outside of the
packaging are consistent.
3. This product is designed and suitable for most electrical power panels.
4. Do not install this product at the openings of ventilation ducts or near heat sources.
5. Make sure that the actual wiring conforms to the wiring diagram designated in this
manual.
6. Guard against dust and water damage.
7. Make sure all power sources to be connected to the product have been shut off
before installing.
8. If the equipment is used in a manner not specified by manufacturer, the protection
provided by the equipment may be impaired.
This symbol means double insulation.
This symbol means to beware of electric shock, turn off all adjacent
sources of high voltage during installation.
This symbol means there is risk of danger.
The SMB350 is a sensitive electrical equipment, care should be taken so that the
maximum benefit and performance can be derived from the device.
Before cleaning or performing any maintenance on the SMB350, disconnect the
device from its auxiliary power source. The input voltage and current should be either
turned off or disconnected.

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Cleaning
Use a dry cloth or dry brush to wipe away the dust, or use in conjunction with a
vacuum cleaner to suck the dust as it is being wiped away. Do not use any water or other
liquid cleaning agents.
Ventilation
Check to make sure that there is sufficient space around the periphery of the SMB350
to allow air to circulate. Reposition any extraneous wiring that is on the SMB350.
Maintenance
Check to make sure that the wiring contacts are tight and making good contact,
tighten any terminal screws that may have loosened over time from jarring or vibration.
Make sure that the wiring contact of each terminal is not touching or shorting adjacent
terminals.
Repair
Do not attempt to repair the product or modify the circuitry; contact the product
representative or a qualified electrical person if the product requires repair or servicing.

SMB350 User’s Manual
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CONTENT
1 Introduction ............................................................................................. 7
1.1 General Description .............................................................................7
1.2 Features.............................................................................................7
1.3 Certifications.......................................................................................7
1.4 Specifications......................................................................................8
1.5 Product Information .............................................................................9
2 Installation............................................................................................. 11
2.1 Front Panel & Terminals .....................................................................12
2.2 Terminals Detail ................................................................................13
2.3 Mounting Procedure ...........................................................................14
2.4 Before Installation .............................................................................15
2.5 Meter Installation ..............................................................................15
2.6 CT Installation................................................................................... 16
2.7 Wiring Diagram ................................................................................. 17
2.8 Measuring Multiple Loads with One Channel ..........................................19
2.9 Auxiliary Power .................................................................................19
2.10 Using a Regular 5A Output CT ............................................................. 20
2.11 RS485 Installation .............................................................................21
3 Operating and Display ............................................................................ 22
3.1 Preface............................................................................................. 22
3.2 LED Display ...................................................................................... 22
3.3 Setup............................................................................................... 24
4 Troubleshooting ..................................................................................... 25
5 Frequently Asked Questions ................................................................... 27
6 Warranty and Return Policy ................................................................... 30
6.1 Warranty .......................................................................................... 30
6.2 Return Policy..................................................................................... 30
7 Supplementary Information ................................................................... 31

SMB350 User’s Manual
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1 Introduction
1.1 General Description
The SMB350 is a multi-circuit and multi-function meter with up to 8 channels for
measuring 3 phase loads. The SMB350 can measure not only the kW and kWh,
but the voltage, current and PF as well.
The SMB350 can be used in 3 phase 4 wire, 3 phase 3 wire and 1 phase 2 wire
configurations. The SMB350 offers up to 24 channels when used in 1 phase 2 wire
configurations.
All circuits measured by SMB350 must be from the same power source.
1.2 Features
Small and compact, can be used for new or existing panels
Multiple channels on one module
Selection of 4 or 8 channel (SMB350-4 or SMB350-8)
Each channel can be used as 3p4w, 3p3w or as 3 separate 1p2w
Multiple function - kW, kWh, kVAr, kVArh, VA, Voltage, Current, frequency,
PF
RS485 Communications using Modbus/RTU protocol
On board LCD display and control buttons for on-site configuration and
diagnosis
Wide selection of dedicated CTs - solid core CTs for economy, split core CTs
for convenience
Power supply using either 120VAC or 240VAC
1.3 Certifications
UL/CUL Listed
CE
FCC

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1.4 Specifications
Item
Descriptions
Common Voltage
A/B/C/N
Channels
SMB350-4
4 channels of 3p4w or 3p3w or 12 channels of 1p2w
SMB350-8
8 channels of 3p4w or 3p3w or 24 channels of 1p2w
Current Measurement
Depends on dedicated CT type
Voltage Measurement
Max Voltage : 80~350 VAC (L-N), 600 VAC (L-L)
Frequency : 50 or 60 Hz
Display
2 lines by 16 characters LCD for displaying measurement
parameters
Auxiliary Power
AC 120 or 240V, ±10%, 50 or 60 Hz
Settable Parameters
Address, baud rate, CT ratio for each channel from 1~250
(equivalent range 1~1,250A)
Operating Environment
-30~50oC (-22~122oF)
0~95% non-condensing
Power Consumption
6VA
Mounting
DIN rail
Host Communication
RS485-1 port
Physical Interface: RS485
Protocol: Modbus/RTU
Baud rates: 1200, 2400, 4800, 9600 bps
Modbus address: 1 to 254
Data format: 8/n/1
Default address = last 2 digits of serial number,
baud rate = 9600
Default address and baud rate can be changed on meter or
through Modbus
Touch Panel Interface
RS485-2 port
Baud rates: 1200, 2400, 4800, 9600 bps
Modbus address: 1 to 254
Default: address = 1,
baud rate = 9600, can be changed on meter
Measured Parameters
Voltage (L-N), Voltage (L-L), Current (A)
kW, kWh, kVAr, kVArh, kVA
Power Factor (PF), Frequency (Hz)
Measurement Category
CAT III
Accuracy (*)
0.5% from 1% to 100% of rated load
Dimensions
(W x H x D)
9.92" x 3.74" x 2.4" (252 x 95 x 61 mm)
Net Weight
SMB350-4：680g
SMB350-8：710g
* Based on DAE’s solid-core CT @ PF=1

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1.5 Product Information
(1) Ordering Code
SMB350-8
Ordering
Code
Compatible
CT
Max.
Current
CT Type
Remark
SMB350-8-A
CT-5D3
5A
Solid-Core
Use with 5A output regular CTs
CT ratio depends on specs of regular CTs
CT-5S
5A
Split-Core
SMB350-8-B
CT-50D3
50A
Solid-Core
CT-100D3
100A
CT-200D3
200A
CT-400D6
400A
CT ratio = 2
CT-600D9
600A
CT ratio = 3
CT-50S/SB
50A
Split-Core
CT-100S/SB
100A
CT-200S/SB
200A
CT-400S
400A
CT ratio = 2
CT-600S
600A
CT ratio = 3
SMB350-8-S
CT-5D3
5A
Solid-Core
Channel 1 only
Use with 5A output regular CTs
CT ratio depends on specs of regular CTs
CT-5S
5A
Split-Core
Channel 1 only
Use with 5A output regular CTs
CT ratio depends on specs of regular CTs
CT-50D3
50A
Solid-Core
Channel 2~8
CT-100D3
100A
Channel 2~8
CT-200D3
200A
Channel 2~8
CT-400D6
400A
CT ratio = 2
CT-600D9
600A
CT ratio = 3
CT-50S/SB
50A
Split-Core
Channel 2~8
CT-100S/SB
100A
Channel 2~8
CT-200S/SB
200A
Channel 2~8
CT-400S
400A
Channel 2~8, CT ratio = 2
CT-600S
600A
Channel 2~8, CT ratio = 3
Note : CT ratio = 1 when using 50A~200A CTs.
CT ratio = 2 when using 400A CTs, CT ratio = 3 when using 600A CTs.
Please see Section 2.10 when using with regular 5A output CTs.

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SMB350-4
Ordering
Code
Compatible
CT
Max.
Current
CT Type
Remark
SMB350-4-A
CT-5D3
5A
Solid-Core
Use with 5A output regular CTs
CT ratio depends on specs of regular CTs
CT-5S
5A
Split-Core
Use with 5A output regular CTs
SMB350-4-B
CT-50D3
50A
Solid-Core
CT-100D3
100A
CT-200D3
200A
CT-400D6
400A
CT ratio = 2
CT-600D9
600A
CT ratio = 3
CT-50S/SB
50A
Split-Core
CT-100S/SB
100A
CT-200S/SB
200A
CT-400S
400A
CT ratio = 2
CT-600S
600A
CT ratio = 3
Note : CT ratio = 1 when using 50A~200A CTs.
CT ratio = 2 when using 400A CTs, CT ratio = 3 when using 600A CTs.
Please see Section 2.10 when using with 5A regular output CTs.
(2) Current Sensor Requirement
Configuration
CT required
1-Phase, 2 Wire
1 CT
3-Phase, 3 Wire
3 CTs
3-Phase, 4 Wire
3 CTs
(3) Dedicated Current Sensors
Solid-Core Dedicated CT
Split-Core Dedicated CT

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Solid-Core Dedicated CT
Models
Current
Window
Dimension
CT-5D3
5A
0.28" (7mm)
0.91" x 0.98" x 0.49" (23 x 25 x 12.5mm)
CT-50D3
50A
0.49" (12.5mm)
1.46" x 1.50" x 0.51" (37 x 38 x 13mm)
CT-100D3
100A
1.02" (26mm)
2.13" x 2.13" x 0.71" (54 x 54 x 18mm)
CT-200D3
200A
1.02" (26mm)
2.13" x 2.13" x 0.71" (54 x 54 x 18mm)
CT-400D6
400A
1.38" (35mm)
2.83" x 2.87" x 0.87" (72 x 73 x 22mm)
CT-600D9
600A
1.38" (35mm)
2.83" x 2.87" x 0.87" (72 x 73 x 22mm)
Split-Core Dedicated CT
Models
Current
Window
Dimension
CT-5S
5A
0.39" (10mm)
0.98" x 1.61" x 1.30" (25 x 41 x 33mm)
CT-50S
50A
0.39" (10mm)
1.02" x 1.89" x 0.91" (26 x 48 x 23mm)
CT-100S
100A
0.63" (16mm)
1.22" x 2.13" x 1.18" (31 x 54 x 30mm)
CT-200S
200A
0.94" (24mm)
1.42" x 2.99" x 1.77" (36 x 76 x 45mm)
CT-400S
400A
1.38" (35mm)
2.36" x 3.54" x 1.57" (60 x 90 x 40mm)
CT-600S
600A
1.38" (35mm)
2.36" x 3.54" x 1.57" (60 x 90 x 40mm)
CT-50SB
50A
0.39" (10mm)
0.91" x 1.54" x 1.02" (23 x 39 x 26mm)
CT-100SB
100A
0.63" (16mm)
1.26" x 2.20" x 1.22" (32 x 56 x 31mm)
CT-200SB
200A
0.94" (24mm)
2.01" x 2.64" x 1.34" (51 x 67 x 34mm)
2 Installation
The SMB350 is a sophisticated energy meter with multiple capabilities and functions.
Before installation be sure to read and understand this section and the appropriate
wiring diagrams. Installation of this device must be performed by qualified personnel
according to these instructions and in conjunction with all applicable electrical codes.
DAE Instrument and its representatives assume no responsibility for any damage or
injury resulting from the improper installation of this equipment.
WARNING: Please make sure you have read the “Safety
Precautions” on the beginning of this user manual before
you start installation.

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2.1 Front Panel & Terminals
Item
Label / Name
Function
1
LED Indicator 1
System activity - blinks during normal operation
2
LED Indicator 2
not used
3
LED Indicator 3
not used
4
LED Indicator 4
not used
5
Up Button
Scroll up
6
Down Button
Scroll down
7
Left Button
Change to next digit when setting
8
Page/Enter Button
Change to next page, or enter
9
LCD Display
2 line by 16 characters, for showing system status and
parameters
10
RX1, TX1 (for primary RS485)
RS485 communication activity:
RX - receive activity
TX - transmit activity
11
RX2, TX2(for auxiliary RS485)
12
RS485-1 Terminals (Primary)
RS485 interface connectors - (S), (-), (+)
13
RS485-2 Terminals (Auxiliary)
14
Auxiliary Power
Auxiliary working power used by module, isolated from
the measured power
15
Channel 1 - A, B, C
Channel 1 3-phase current inputs
16
Channel 2 - A, B, C
Channel 2 3-phase current inputs
17
Channel 3 - A, B, C
Channel 3 3-phase current inputs
18
Channel 4 - A, B, C
Channel 4 3-phase current inputs
19
Channel 5 - A, B, C
Channel 5 3-phase current inputs
20
Channel 6 - A, B, C
Channel 6 3-phase current inputs
21
Channel 7 - A, B, C
Channel 7 3-phase current inputs
22
Channel 8 - A, B, C
Channel 8 3-phase current inputs
23
Measured voltage terminals -
VA, VB, VC, VN
Common voltage for all channels
Note : Items 19 to 22 are not applicable to the SMB350-4

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2.2 Terminals Detail
(1) Voltage input terminals (Measured voltage input)
Use the proper size and wire type as per electrical regulations.
(2) Other terminals
Make sure that the wires are screwed tightly onto the terminals and
making good contact.
(3) Recommended Wire Size
Terminal type
Wire range
Auxiliary power
#12-24 AWG, screw torque 7 lb-inch
RS485
#12-24 AWG, screw torque 7 lb-inch
Current input
#12-24 AWG, screw torque 7 lb-inch
Measured voltage input
#10-18 AWG, screw torque 16 lb-inch

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2.3 Mounting Procedure
(1) Mounting

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2.4 Before Installation
(1) Check that the ratings and specification of the model to be installed is suitable
for its intended application.
(2) Verify that the dedicated CT being used is compatible with the type of
SMB350. Note that the SMB350 cannot be directly used with non-DAE
dedicated CTs. See the special application section for using the SMB350 with
common 5A output CTs.
(3) Verify that the current rating of the dedicated CT being used is suitable for its
intended load.
(4) Make sure to turn off all power sources to the SMB350 and any adjacent
power sources before performing the installation.
2.5 Meter Installation
(1) Mount the SMB350 to the desired DIN rail track location and lock it in place.
(2) Attach the dedicated CTs to the CT terminal with their appropriate channels
and phases.
(3) Connect the appropriate SMB350 auxiliary power source terminals to the
corresponding power source with an intermediate fuse, use the fuse seat and
fuse provided with the product. The SMB350 can be used with either 120V or
240V AC.
(4) Connect the measured voltage terminals of the SMB350 to their
corresponding voltages with a fuse for each phase. (Use 10 to 18 AWG, 600V
wire for both the auxiliary power source and the measured voltage terminals.)
(5) Assemble the CTs onto the corresponding conductors being measured
making sure that the direction and orientation of the CTs with wiring are
consistent. With solid core CTs, the wire must be threaded through the CT,
which would necessitate disconnecting the wire from the load. With split core
CTs and clamp type CTs, the CT can be opened and clipped or clamped onto
the conductor without the need to disconnect the wiring to the load.

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2.6 CT Installation
Polaris meters only can use the dedicated CT provided by DAE. DAE’s dedicated CTs
have two types as the follow descriptions.
(1) Split-core CT installation
Load side
Step 1. Open the split-core CT Step 2. Hoop up the loading wire
Step 3. Clipped the split-core CT
Meter side
Red or white wire to CT+ terminal on the meters, and black wire to CT-
terminal on the meters. Please see the “Terminals Detail”section.
(2) Solid-core CT installation
Load side
With solid core CTs, the wire must be threaded through the CT, which
would necessitate disconnecting the wire from the load.

SMB350 User’s Manual
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Meter side
Red or white wire to CT+ terminal on the meters, and black wire to CT-
terminal on the meters. Please see the “Terminals”section.
2.7 Wiring Diagram
All circuits measured by SMB350 must be from the same power source.
(1) 3-Phase, 3 Wire
VAB, VBC, VCA ≤600VAC

SMB350 User’s Manual
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(2) 3-Phase, 4 Wire
VAN, VBN, VCN = 80~350VAC
(3) Single-Phase, 2 Wire
VLN = 80~350VAC
Note : Please install fuses for the voltage inputs.

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2.8 Measuring Multiple Loads with One Channel
(1) The loads must be the same configuration and come from the same power
source.
(2) Max. 3 loads for each meter; each load needs complete sets of CTs and each
CT must be the same rating.
(3) The load wire thread through the CTs must be the same direction. The
multiple CTs for the same phase of multiple loads must connect to the correct
polarity (Red wire to CT+ terminal and black wire to CT- terminal on the
meters).
e.g. 3-Phase, 4 Wire, Channel 8 Wiring
2.9 Auxiliary Power
The auxiliary voltage is single phase and can be derived from either a
240VAC or 120VAC power source, but not both. The auxiliary power is the
working voltage for the SMB350 itself and is electrically isolated from the

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measured voltage. Although the auxiliary voltage can be derived from the same
source as the measured voltage it is not recommended as the working voltage
should be as isolated from the measured voltage and be stable as possible so
that fluctuations in the measured voltage does not affect the SMB350 logic and
measurement circuits.
2.10 Using a Regular 5A Output CT
For installations with pre-existing CTs or if larger capacities is required, the
user should choose the dedicated 5A CT (either the CT-5D3 or the CT-5S) and
connect the user provided CT to the dedicated 5A CT as shown in the diagram
below.
When using regular CT, the SMB350 needs to set the CT ratio. For example,
when using 500A : 5A regular CTs, the CT ratio should set 100.
POWER
240/120/0V
Fuse
N
L
Aux. power = 240Vac
POWER
240/120/0V
N
Aux. power = 120Vac
L
Fuse
Not
used
Not
used