Siemens SEM3 User manual

!
DANGER
Hazardous Voltage.
Will cause death or serious injury.
Turn off and lock out all power before working on
this equipment.
Installation
If the SEM3 equipment is used in a manner not specied by
Siemens, the protection provided by the equipment may be
impaired.
• During normal operation of the SEM3 meter, hazardous
voltages are present on its voltage leads, and throughout
the connected potential transformer (PT), digital (status)
input, control power and external I/O circuits. PT circuits
are capable of generating lethal voltages and currents with
their primary circuit energized. Follow standard safety
precautions while performing any installation or service
work (i.e. removing PT fuses).
• The voltage leads to the meter should not be user‐accessible
after installation.
• Do not use digital output devices for primary protection
functions. These include applications where the devices
perform energy limiting functions or provide protection of
people from injury. Do not use the SEM3 in situations where
failure of the devices can cause injury or death, or cause
sufcient energy to be released that can start a re. The
meter can be used for energy management functions.
• Do not HIPOT/Dielectric test the digital (status) inputs, digital
outputs, or communications terminals. Refer to the label on
the SEM3 meter for the maximum voltage level the device
can withstand.
• The SEM3 metering system offers a range of hardware
options that affect input ratings. Use only parts and
assemblies that are made specically for use with the SEM3
system. Failure to do so could permanently damage the
meter. This document provides installation instructions
applicable to each hardware option.
For more detailed installation information refer to full SEM3
Manuals available at usa.siemens.com/sem3.
Environmental ratings:
• Temperature to 14°F to 149°F (‐10°C to 65°C)
• Measurement Category III (CAT III)
• Mains Supply Voltage Fluctuations up to 10% less than
nominal low range the mains supply and 10% more than
nominal high range of mains power supply
• CT Overvoltage Category IV (Cat IV)
Installation and maintenance of the SEM3 metering system
should only be performed by qualied, competent personnel
that have appropriate training and experience with high
voltage and current devices. The meter must be installed in
accordance with all local and national electrical codes.
SEM3™ ‐ Embedded Micro
Metering Module™
Quick Reference Guide and
Installation Instructions
usa.siemens.com/SEM3
Scan QR Code
for more
information

2
Disconnecting Device:
A disconnecting device such as a switch or circuit breaker is
required in case of an emergency.
• The switch or circuit breaker must be marked as the
disconnecting device for the meter.
• It is recommended that the meter be mounted near the
disconnecting device in an area with adequate ventilation.
• The disconnect should not be positioned in a manner that
makes it difcult to operate the disconnecting device.
To reduce risk of electric shock, always open or disconnect the
circuit from the power distribution system of a building before
installing or servicing current transformers.
CT Installation:
• The CTs used with the SEM3 metering system are specically
designed and rated for use with the system. Use of other CTs
can be damaging to SEM3 components and cause hazardous
situations. All the CTs used with this system are in compliance with
the most up‐to‐date safety standards. Use only UL Listed Energy
Monitor Current Transformers, evaluated and approved for SEM3
application. Size CT primary rating with the load to be measured.
The CT primary rating should be equal to or greater than the load.
SEM3 Solid Core CTs
50:0.1 Solid Core CT ‐ US2:SEM3SCCT50
125:0.1 Solid Core CT ‐ US2:SEM3SCCT125
250:0.1 Solid Core CT ‐ US2:SEM3SCCT250
400:0.1 Solid Core CT ‐ US2:SEM3SCCT400
600:0.1 Solid Core CT ‐ US2:SEM3SCCT600
800:0.1 Solid Core CT ‐ US2:SEM3SCCT800
1200:0.1 Solid Core CT ‐ US2:SEM3SCCT1200
Siemens approved UL listed energy Monitoring Current
Transformers other than the one listed here may also be used
with the SEM3 System.
All CTs should be securly fastened within the gear such that
they will not slide down to live terminals and to protect against
damage.
• In accordance with NEC, CTs may not be installed in any panel
board where they exceed 75% of the wiring space of any cross
sectional area.
Input protection:
• The controller has ve leads that are color coded and
labeled to the appropriate phases and ground connection.
All phase (ungrounded) connections should be protected
by a 3 amp fuse or circuit breaker that is appropriate for the
applied voltage and available short circuit rating. (Example:
a type CC fuse rated at 3 Amp (Time‐Delay) and good for
application on up to a 200 kAIC system at 480 volts).
Conductors and eld wiring:
• Where applicable, “connect 14 AWG min., 600 V min.
insulated wiring for Line voltages and Neutral to the
appropriate location in the breaker panel, in accordance
with all national and local electrical codes”.
• Connector torque rating for wiring terminals is 5 IN‐LBS

3
The SEM3 system is made up of the following
components and options:
1. Controller – The controller is used to communicate the
metered values to outside systems by way of a web page
interface, Modbus RTU or Modbus TCP. One controller can
manage up to 45 meter modules.1) The controller also has
the system digital inputs for receiving pulse inputs from
other metering devices as well as a digital output for the
combined KWh output of the system being metered.
2. Meter modules – There are two choices for the meter
modules that are differentiated by accuracy specication.
The accuracies are 1% for the standard accuracy modules
and 0.2% for the high accuracy modules. The accuracy is
tested in accordance to ANSI C12.20/0.2.
3. Meter racks – The meter modules are designed to snap into
the rack assemblies. The rack assemblies are sized by how
many modules will t into each and come in 3, 9, 15 and 21
module congurations.
4. CT or current transformers – The SEM3 systems has solid
core CTs for use with the system in the following maximum
amperage ranges 50, 125, 250, 400, 600, 800 and 1200
amps. These are maximum amperage ranges for normal
usage but will measure accurately down to 1% of the
maximum range.
5. Communication cables – The communication cables
are designed like CAT 5 cables but are insulated for use
in systems up to 600 volts. The cables are for two way
communication from the controller to the rack/meter
modules.
Figure 1 SEM3 System
SEM3 System
!
DANGER
Hazardous Voltage.
Will cause death or serious injury.
Turn off and lock out all power before working on
this equipment.

4
Conguring the system
There are a few steps in conguring the components of the SEM3 metering system.
Refer to the Installation Manual instructions on mounting of the SEM3 components.
Current Transformer (CT) – There is no setting on the CT for the system. The CTs for
use in the SEM3 meter system are 100 mA output and are self protecting so shorting
blocks are not required. Standard CT wire length is 6 feet. CT wire length can retain
accuracy up to 100 feet using 18 AWG twisted pair wire.
Meter modules – These instructions are for both levels of accuracy modules.
Each meter module is a single phase meter and must be connected to the
appropriately sized SEM3 system CT. The meter modules are then snapped into place
into a rack assembly. The rack assembly has the module address to the controller hard
coded in the hardware.
Note: For metering of multi‐pole circuit breakers, the meter modules must be
mounted contiguously to each other.
Gaps in the rack will not allow multi‐pole meters to be congured. Each module must
have the phase dip switch on the top of the module set to the phase that the CT is
metering; phase A, B, or C (Line 1, 2, or 3 respectively).
Note: Once the meter module is placed into the rack and energized the phase position
will be indicated by a different color LED for each position. These descriptions are for
the connections to the controller not the LED colors on the meter module. (L1 phase
A color is orange; L2 color is yellow; L3 color is green.) The LEDs are adjacent to the
phase numbers. The Kwh pulse is available for an accuracy check as stipulated by
some authorities KT=10 (5 on ‐5 off). CT sizing for each meter module will be done
through the controller web page later in conguration.
Controller – The controller functions as the set up interface for the system.
System settings, CT ratios, PT ratios, alarm settings, communications settings
and passwords are all set using the web page interface of the controller. See
Installation Manual instructions for mounting and dimensional information.
To start – Connect the controller to a PC using the Ethernet / Modbus TCP port.
See Figure 4.
Assign Static IP address
To change the PC / computer’s IP address in Windows 7 / 8,
1. Type network and sharing into the Search box in the Start Menu and select
Network and Sharing Center when it comes up.
2. Then when the Network and Sharing Center opens, click on Change adapter
settings.
3. Right‐click on your local adapter and select Properties.
4. In the Local Area Connection Properties window highlight Internet Protocol
Version 4 (TCP/IPv4) then click the Properties button.
5. Select the radio button and enter the correct IP address Ex. 192.168.1.100,
and Subnet mask 255.255.0.0. The PC static IP address should be in the
same IP address range of the SEM3 controller.
6. Close out of the Local Area Connections Properties window.
7. You can open the command prompt and do an ipconfig to see the network
adapter settings have been successfully changed.
Ping your SEM3 Controller (Default IP address: 192.168.1.65)
Open a Command Prompt and at the prompt type “ping” followed by a space & the
IP Address of your SEM3 and press Enter.
You should get the following:
Pinging 192.168.1.65 with 32 bytes of data:
Reply from 192.168.1.65: bytes=32 time=56ms TTL=250
Reply from 192.168.1.65: bytes=32 time=60ms TTL=250
Reply from 192.168.1.65: bytes=32 time=69ms TTL=250
Reply from 192.168.1.65: bytes=32 time=78ms TTL=250
LED indicates Phase position
switch location
CT wire
screw terminals
CT wire
terminal blocks
Solid core shown, split core available
Three phase wiring
Isolated
RS485C
Two energy
pulse in
Energy pulse out
Left rail
MODBUS TCP/IP
Right rail
Figure 2 Current transformer
Figure 3 Meter module
Figure 4 Controller
(continued on next page)
Release lever to
allow easy removal
from the rack
KWH pulse
Blue mark indicates high
accuracy, and burgundy
mark indicates standard
accuracy
QR
code

5
The 3 and 6 module racks can be used as an extension to any of the other racks or pairs of racks. Settings must be such that no
address is used more than once. Duplication of addresses will return an error on setup.
Meter Module Internal Addresses – Dip and rotary switches on the racks are used to assign the unique addresses for the
meter module. Table 1 indicates rack addresses for Left setting on 9, 15 and 21 module racks and setting 0‐7 on 3 meter module
rack, 0‐3 on 6 meter module rack. Table 2 indicates addresses for right setting on 9, 15, and 21 module racks and 8‐F on 3 meter
module rack, 4‐7 on 6 meter module rack. Right chart indicates addresses for right setting on 9, 15, and 21 module racks and 8‐F on
3 module rack.
Meter Racks – The meter module racks have the addresses for the module to controller communications hard coded into them. The 9,
15 and 21 module racks have a two position dip switch for setting one of two address ranges for each. The three and six module rack
has a rotary switch to allow it to be configured for multiple address ranges. The chart below shows the ranges available for each rack.
Ping statistics for 192.168.1.65:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli‐seconds:
Minimum = 56ms, Maximum = 78ms, Average = 65ms
If not, then check your connection between the PC’s Ethernet port and the Controller MODBUS TCP/IP port.
Open Explorer or Chrome and type out the IP address 192.168.1.65.
At the Login Page, the default user name is “admin”, and the default password is “sem3”.
!
DANGER
Hazardous Voltage.
Will cause death or serious injury.
Turn off and lock out all power before working on
this equipment.
Single
Phase
Monitor
Modbus
Addresses
21
Position
Rack
Modbus
Addresses
15
Position
Rack
Modbus
Addresses
9
Position
Rack
Modbus
Addresses
6
Position
Rack
Rotary
Switch
Setting
6
Position
Rack
Modbus
Addresses
3
Position
Rack Rotary
Switch
Setting
3
Position
Rack
Modbus
Addresses
1 1 1 1
0 (8)
1
0
1
2 2 2 2 2 2
3 3 3 3 3 3
4 4 4 4 4
5 5 5 5 5
1
5
6 6 6 6 6 6
7 7 7 7 7
8 8 8 8
9 9 9 9
1 (9)
9
2
9
10 10 10
Open
Address
Space
10 10
11 11 11 11 11
12 12 12 12
13 13 13 13
3
13
14 14 14 14 14
15 15 15 15
16 16
Open
Address
space
17 17
2
17
4
17
18 18 18 18
19 19 19 19
20 20 20
21 21 21
5
21
22
Open
Address
Space
22 22
23 23
24
25
3
25
6
25
26 26 26
27 27 27
28 28
29 29
7
29
30 30 30
31 31
32
Single
Phase
Monitor
Modbus
Addresses
21
Position
Rack
Modbus
Addresses
15
Position
Rack
Modbus
Addresses
9
Position
Rack
Modbus
Addresses
6
Position
Rack
Rotary
Switch
Setting
6
Position
Rack
Modbus
Addresses
3
Position
Rack Rotary
Switch
Setting
3
Position
Rack
Modbus
Addresses
33 33 33 33
4
33
8
33
34 34 34 34 34 34
35 35 35 35 35 35
36 36 36 36 36
37 37 37 37 37
9
37
38 38 38 38 38 38
39 39 39 39 39
40 40 40 40
41 41 41 41
5
41
A
41
42 42 42
Open
Address
Space
42 42
43 43 43 43 43
44 44 44 44
45 45 45 45
B
45
46 46 46 46 46
47 47 47 47
48 48
Open
Address
space
49 49
6
49
C
49
50 50 50 50
51 51 51 51
52 52 52
53 53 53
D
53
54
Open
Address
Space
54 54
55 55
56
57
7
57
E
57
58 58 58
59 59 59
60 60
61 61
F
61
62 62 62
63 63

6
Login page – Default user name is “admin”, Default password is
“sem3”. User name and password can be set to user preference
and
are case sensitive. See the User Manual for more detail.
The web page has other settings available and can be accessed by
clicking on the tabs at the top of the page.
System settings – The following may be set from this page: (See
user manual for more information)
• IP configuration – For configuration of the IP address if using
Modbus TCP. Be sure to write down the new IP address as you
will lose communications once saved.
• RTU slave configuration – For setting of address if used as a
Modbus RTU device
• Real time refresh interval – Time interval for the web page to
refresh real time date
• Device description – For naming of the system
• Panel configurations to include:
• Demand sub interval – Number of measurements taken
in the sub interval
• Sub interval length – Time between intervals
• Voltage mode – Delta or Wye
• Line to Neutral / Line to Line voltage depending on
voltage mode
• Potential Transformer (PT) Primary voltage – Secondary
preset to 120
Save – Data changes must be saved before leaving this page or it
will be lost.
Reset
Data available from this page –
• Firmware version
• Serial number of the controller
Global settings – Global settings will be applied across all the
meters in the system. Each meter can be customized in the
Branch meter configuration screen. The alarms are for the meters
and not meter modules. Individual phase alarms can only be set
for single pole meters. Alarm delays are time settings where the
meter is in alarm condition before the alarm flag is set. This is to
prevent momentary conditions sending alarm flags.
Multi-pole circuit breaker configuration – This page is used to
configure the meter modules into meters. The bottom of the page
displays those meters configured from the bottom of the page. The
meter configuration is drag and drop from the available module
column to the different meter configurations (1, 2 or 3 pole). Note
that modules have to be mounted contiguously in the racks to be
configured as multi‐pole meters.
Branch meter configuration – This page allows for
customization of the configured meters. Custom alarms may
be set that override the global alarms as well as naming of the
individual meters.
Real time data – This screen gives an overview of the alarm
status of the configured meters and allows for clearing of
the individual meter alarms. Clicking on the individual
meters will display that meters real time information to the
right of the grid.
User profile – This page is accessible to all users who can
modify their details except the ‘User ID’ and ‘Access Level’.
User ID and Access Level are set by the Supervisor only from
the User management screen.
User management – This page is accessible to ‘Supervisor’
user who can manage users’ accounts that includes adding,
removing and modifying the users. There are three levels of
users available:
• Supervisor – Has the ability to see all data and modify
setting and clear alarms and add or modify user settings.
• Controller – Has the ability to see all data and to clear
alarms. Controller cannot see or modify user
management.
• Observer – Has the ability to see data but is not allowed
to modify or clear alarms.
Diagnostics – This page is accessible to ‘Supervisor’ user.
The SEM3 metering system can work with supervisory
systems such as WinPM.Net, Power manager and other
SCADA or Building management systems that use Modbus
protocol. The Modbus registers for this product are such that
configuration using the controller web interface is not
absolutely necessary, but by doing so valuable time can be
saved.
1) Some applications will allow for more than 45 poles in one enclosure by adding a
second controller. Two controllers can monitor up to 90 poles.

7
Notes

Siemens Industry, Inc.
5400 Triangle Parkway
Norcross, GA 30092
1‐800‐241‐4453
[email protected]
Order No. RPFL‐SEM3Q‐0916
Ref. No. 814388 Rev. 3P
Printing in USA
© 2016 Siemens Industry, Inc.
Subject to changes and errors. The
information given in this document only
contains general descriptions and/or
performance features which may not always
specifically reflect those described, or which
may undergo modification in the course of
further development of the products. The
requested performance features are binding
only when they are expressly agreed upon
in the concluded contract.