WEM-IO: Web Enabled Relay For Energy Management And Load Control:
Energy Tracking’s WEM-IO is highly versatile that makes it an ideal product for demand response applications
as well as for applications that require an IP enabled pulse input data logger with relays to enable
load control with reporting in real time over the Internet. Its built-in logic enables remote or automated
load control allowing duty-cycling, threshold triggering, input triggering and relay triggering on demand.
It can also trigger a relay in the event of a power loss due to its lithium ion battery backup.
The WEM-IO’s network interface provides 10/100 Base-T Ethernet access and advanced real-time reporting
capabilities via email, ftp, built in web server and XML / Web Service.
It can also directly communicate with Energy Tracking's WEM-MX electric meter to acquire the current load (kW)
and trigger one or more relays based on user defined threshold settings.
The ability of the WEM-IO to communicate via Ethernet makes it an ideal product for demand response applications
which allows for two-way communications and real-time load controlling via TCP/IP. The WEM-IO can periodically
initiate communications with a remote web server asking for a further directive. The web server can issue
commands that will be used to engage or disengage the WEM-IO’s relays.
This smart device can report the state of the relay(s) and can also provide load profile data on demand or
periodically via SOAP Web Services.
The WEM-IO is primarily designed to provide a low cost mechanism to enable load reduction and transmit
real-time data using the Internet. It also has a embedded web server which allows manual control of
the relays as well as setup of the various automation modules built into the WEM-IO.
As always, Energy Tracking’s products use 100% open protocols and the data reported by the WEM-IO is
always in XML irrespective of the mode of reporting.
Energy Tracking’s WEM-IO enables users to have access to a web enabled relay module to efficiently manage loads
manually or use its built-in automated options for energy management applications.
- Two Relays for Load Control.
- Two Pulse Input Channels.
- For Demand Response Applications, the Web Server can provide commands to engage one or more relays.
- Configurable Load Profile logging interval.
- Internet connectivity via dynamically assigned IP address or fixed IP address.
- Email notification with cc: option.
- Data transfer via email, ftp, web server, or SOAP Web Service client.
- FTP client - To send load profile, relay states and consumption summary details.
- SNTP for (International) time synchronization.
- Log-in to web server is authenticated.
- Data encapsulation format - XML.
- Programmable alpha-numeric Device ID and Device serial number.
- Programmable demand (kW) threshold. WEM-IO triggers relays when exceeded by accessing the WEM-MX.
- User Configuration of built-in modules such as Duty Cycling, Threshold Trigger, Input State Triggering.
- Programmable reporting of load profile data at end of interval or at fixed intervals.
- Mail, ftp or SOAP reports include summation values for pulse inputs.
- Mail, ftp or SOAP Web Service client reports can be setup to be sent every 1 minute or later.
- Open Protocols XML, HTTP, SMTP, SNTP, FTP, DHCP, DNS, SOAP.
The WEM-IO can trigger a relay to start charging external storage batteries when the solar generation exceeds
a pre-defined kW threshold.
Certain jurisdictions do not allow export of (solar or other) generated kWh to the grid. The WEM-IO also has the ability to communicate with a WEM-MX
meter which measures both import and export of kWh. The WEM-IO has an option to trigger a relay which can further provide a signal to the invertor or another relay to
disconnect thus preventing export of kWh to the grid.
Demand Response Application:
The WEM-IO is IP enabled and has the ability to communicate to a remote server via Web Services. The WEM-IO can be
configured with a unique Device ID, Device Serial Number and be given a unique Zone ID. These details are sent to
the Web Server (via XML / SOAP). The advanced business logic at the Web Server’s end can review this data
and access additional data such as the remote host IP address and the Device’s MAC ID to confirm that this
is a valid request.
Based on the current load conditions, the remote server can send a directive to the WEM-IO to engage or disengage
one or more relays. In addition, the Web Server can request the next contact time. Please contact Energy Tracking
for more details.
Duty Cycling Application:
There are many applications where you would want to prevent two loads from being engaged at the same time. An
example would be that two HVAC units should not come 'ON' at the same time to minimize the peak demand.
The WEM-IO has a Duty Cycling module built-in.
Input Triggering Application:
The WEM-IO is also a pulse input data logger having two inputs. When the state of the pulse input changes, the
corresponding relay will also change state. The WEM-IO can be configured to change relay states from High to Low
or Low to High. The state change will be logged and reported.
Threshold Triggering Application:
The WEM-IO is also capable of counting pulse inputs. Certain application may require a 'Floor' setting where
N number of pulses must be received OR a 'Ceiling' where N number of pulses must not be exceeded for a user defined
time frame. The WEM-IO has the ability to trigger relays based on a user defined time frame for floor, ceiling or both
Manual Load Control Application:
The WEM-IO has a built-in web server which allows the end user to manually turn 'ON' or 'OFF' the relays.
Power Failure Triggering Application:
The WEM-IO is battery backed up using a Lithium-Ion battery and has a re-charging circuit built-in. Upon a power
failure the WEM-IO will seamlessly switch to it backup power. The WEM-IO can be set to engage a relay upon detecting
a power loss.
As an end user, you may have purchased our electric measurement meter: WEM-MX. The WEM-IO device has the ability to query
the WEM-MX and acquire the current kW demand. Based on user defined thresholds, the WEM-IO can trigger relays to
minimize the peak demand.
Need a Customized Application for the WEM-IO?
Please contact Energy Tracking.
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